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The memory lane of the HandyMate Digital Tape Measure is featured by the 8 memory functions allowing for an easy attraction at a later time. The design is made from strong metal featuring high-quality carbon steel.
With that said, the best digital tape measure is eTape16 ET Best Reviews. Table of Contents. Though this type tends to be a bit smaller and somewhat heavier, there is still a digital display. It may be more petite, though it offers accurate readings to within the same standard deviation as other options.
You can find hybrid selections in various sizes, though more often than not they are powered by a set of replaceable batteries. The unit will likely be able to convert your units and store values in its memory.
Sometimes, you can find a hybrid selection able to calculate advanced formulas. Useful for those who prefer to titrate in technology, these continue to be popular. A handy option for those with overflowing tool kits, this type of digital tape measure takes up less space than other options.
You can find compact digital tape measures in both exclusively digital and hybrid styles. Often, the unit will include a carrying pouch to protect it against damage. Powered by batteries and with a very small LCD display, this type of measuring tape usually features a long battery life.
Typically, it will have an automatic shutoff with activity. Given the size of the screen, it also extends battery life. The first is the type of tape. Choose something that works for you. The next thing to look for is range and precision. Opt for at least feet of range with the laser to give yourself the chance to measure larger areas.
When assessing these digital tape measures , there are a few things we kept in mind. Broken into a couple of categories, we looked primarily at function, structure, and power. By assessing each of these parameters as noted by the description, we were able to identify the top selections.
First, we looked at function; finding the selections with the most ability digit conversion, accuracy, range, memory. The next step in our analysis, provided the tape met the standards for function, is looking at the structure. Is the screen properly sized? Are the buttons accessible? Is it easy to read? Provided these lined up, we moved forward to the power section.
All digital tech requires a power source. So long as the power was accessible strong USB port or replaceable batteries , it made the cut. From there, we looked at the products repute and track record before making our final recommendations. As with any tool, there are some essential features to make your experience a successful one. Sure, some are more critical than others; but, when you find a tape measure that has all these features and more, you can rely on it to work.
Prioritize the features and, from there, you can identify the best digital tape measure for you. What sets digital tape measures apart from their analog counterparts is the LCD display. This feature lets you interpret the results achieved by the digital component. Sometimes the screens are a few square inches and sometimes they are quite small. Within this component, you can find a lot of other features, too. For instance, larger screens can display more simultaneously.
They also enable you to see more clearly, especially when the screen is backlit. This is where to keep an eye on resolution and waterproof abilities especially if you work in humid areas.
So long as the screen is well-placed and large enough, you can achieve the desired results. While tape may be a loose term, the reach of the measuring tape counts for a lot. Sure, some options have both a physical tape and a light beam.
However, even if the tape is just a laser pointer, it can work equally as well, if not more precisely. The idea is to identify the quality of the tape and how it relates to the measurement sensors. With lasers, you can expect a range of roughly feet while a tape will have drastically less reach.
However, lasers only work when the unit has sufficient power. So long as the laser interfaces well with the display, it is a good way to go. Naturally, your tape measure needs to perform the key job: measuring. However, not all readings are made alike. For one, you need to keep an eye on the accuracy. So long as this can be achieved, you are getting the full benefits of the digital features since human readings at this accuracy level are subject to flaw.
You also want measurements that work in multiple metrics. Ideally, it will be able to complete formulas, saving you time. You can find selections that measure volume and readings according to the Pythagorean theorem right angle triangles. Finally, you need to be able to run the measuring tape.
There are two options within this category, both viable and more a matter of personal convenience. The first is replaceable batteries which are the most common designs on the market. The other option is a rechargeable battery that uses a USB cord to recharge the internal system.
Provided you have access to a laptop, a PC, or a wall adapter like those found with cell phones, this is a viable option. However, when you take it on the road, you may want something with a replaceable battery backup. Just like with any tool, digital tape measures have specific maintenance requirements. While this is fairly straightforward, prudent scheduling of preventative upkeep can drastically improve the shelf life of your measurement tool.
As with most things, it comes down to both storage and cleaning. The idea is to keep it in prime condition for when you need it. As such, keep it reasonably charged and promptly take out spent batteries.
When you practice proper maintenance, your readings are more reliable and the part lasts longer. Digital tape measures are a relatively new piece of technology. Naturally, this means that owners and operators have a fair share of questions.
This level of precision is next to impossible with the human eye alone, adding value to the digital interface. A regulated measuring tape falls under certain guidelines which can be consulted for more details.
A: The red dot on a tape measure is where the laser sits. Sometimes, this part is used in the place of the physical tape whereas other times it functions as a straight edge or a level. A: Turn on the tape measure and set the metrics you desire.
Activate the tape whether physical or laser and place its end at the second spot stand at the first. Interpret the measurement on the screen and jot it down. If necessary, set the function for the desired formula and get that readout too. Should you need the same reading later, store it in the memory. Though many have an automatic shutoff feature, you can save power by turning it off right away. A: Most options come pre-calibrated, adding ease by letting you get back to work.
Previously published research comparing precision of self-report vs trained-technician measurements indicate self-report measurements may be sufficiently accurate for epidemiological studies [ 33 — 35 , 38 , 42 , 43 ].
The few research studies available suggest that training, especially video instructions, have the potential to improve self-reported waist measurement accuracy [ 37 , 41 ]. These findings are promising, but their application remains limited for numerous reasons. For example, the instructions written and video provided to study participants are generally unavailable beyond the study participants.
Additionally, the participant burden e. A key factor limiting application and replication of existing research is the tape measure used. That is, previous studies have relied on tape measures with special characteristics [ 10 , 44 ] or one mailed to participants [ 7 , 16 , 39 , 45 ]—this limitation makes it costly and logistically-difficult to conduct a large scale survey or promote self-measurement as a strategy for self-monitoring of health.
In addition, little is known about the reliability of self-measurements over time in any population group [ 46 ]. Another limitation of published studies is the statistical procedures used to compare self- and technician-measurements.
Many report only correlation coefficients e. Of those reporting Bland-Altman plots, no studies of technician- vs self-measurements could be located that applied the array of reporting standards for Bland-Altman analysis of agreement between measurements taken by technicians vs.
Thus, to overcome limitations of previous research and ascertain the test-retest reliability and criterion validity of a self-report tool feasible for use in large scale studies, this study compared self-measurements of waist, hip, and neck circumferences taken by novice lay people i. All participants gave informed consent.
Participants were recruited via announcements posted on community websites and distributed through workplace listservs. Recruitment materials invited individuals to learn to accurately measure their neck, waist, and hips and then have these measurements taken by a trained researcher.
To be eligible for this study, participants had to be women, between 18 and 45 years of age, have at least one child under 12 years of age, and not be pregnant within the past year. Tape measures that can be downloaded, printed on home printers, and assembled with scissors and tape are commonly used by online clothing companies to ensure ordered clothing will properly fit purchasers.
Development of the tape measure for this study began by collecting and reviewing a wide array of online tape measures and assessing them for measurement accuracy, ease of assembly, and clarity of instructions. Existing tape measures were extensively adapted to create the tape measure used in this study; adaptations included developing by clarifying assembly instructions and improving labeling of cutting lines and pieces to be joined by tape see Fig.
Development of the video began by writing Tape Measure Digital Journals scripts using consumer-friendly terminology. The scripts included instructions for creating the tape measure and taking neck, waist, and hip circumferences. The key points addressed in the video are shown in Table 1. Waist was measured at the level of the belly button umbilicus [ 48 — 50 ], hips measured at the level of maximum extension of the buttocks [ 17 , 50 ], and neck at a point halfway between the collar bone and chin in the middle of the neck [ 25 ].
Before participants were recruited, the tape measure and video were posted online. The tape measure and video underwent formative cognitive testing with women similar to the study participants, but not included in the study reported here, to verify clarity of information, accuracy of interpretation, and application of the information; it was iteratively refined based on formative testing findings.
Subsequently, the tape measure and video were pilot-tested with 7 women recruited in the same way as the study sample and having characteristics similar to those in the study sample, but not in the sample, and again refined. Participants completed an in-home assessment, including self-measures and an online questionnaire part 1 , followed by a clinical visit part 2.
In part 1, participants viewed the less than 9 min instructional video explaining how to measure their own waist, hip, and neck circumferences using the measuring tape they printed out and assembled. Participants were advised to watch the video carefully and as many times as required until they felt sufficiently confident to take their measurements accurately. They also were instructed to pause the video at each of these points to complete the task before proceeding: assemble the tape measure, measure waist, measure hips, and measure neck.
The video provided verbal instructions along with photos of women demonstrating the measuring procedure. The survey also collected participant name, demographic data, height, and weight and evaluated video clarity and ease of constructing the tape measure.
Participants were instructed to retain the tape measure. In part 2, participants visited a campus anthropometrics lab. At the lab, technicians confirmed participants took their measurements at home using the tape they assembled and brought to the lab. The participant-assembled tape measure was labeled and later analyzed for accuracy of assembly.
Participants were instructed to fast 4 h before the visit and to wear light, snug clothing. At the lab, participants were instructed to void their bladders, watch the video, and take their measurements in duplicate in the same way they did at home using a commercial measuring tape like those used in home sewing the home-assembled paper tape measures were not used in the lab to preserve them for later analysis.
At the conclusion of the session, technicians briefly interviewed participants to explore their perceptions of the clarity and ease of following the instructions in the video and to identify suggestions for improvement. Technicians reviewed standard anthropometric measurement protocol [ 51 ], discussed the protocol with the lead technician, viewed live demonstrations of measurements being taken, and then practiced taking measurements until they achieved a high degree of accuracy compared to the lead technician.
The coefficient of inter-observer reliability was above 0. Technical error of measurement was calculated for each set of duplicate measurements to assess intra-observer error and reliability [ 51 — 54 ]. Agreement between all possible pairs of measurements were examined using Intraclass Correlations ICCs. Home and lab self-measurements were compared to establish test-retest reliability repeatability of measurements.
Analysis procedures for Bland-Altman plots incorporated the array of reporting standards for agreement analysis in laboratory research [ 20 ]. These plots graphically illustrate the agreement between participant home self-measurements and technician measurements [ 47 , 55 , 56 ]. A comparison of the magnitude of measurement errors between study participants i.
This difference was set after scrutinizing previous research for guidance. For example, a review article examining the magnitude of measurement error for waist circumferences taken at various anatomical locations none included umbilicus reported that intra-observer and inter-observer measurement error ranged from 0. Additionally, studies rarely report absolute measurement error e. Although no reports of error as a percent of body circumferences could be located and a clinically meaningful difference for inter-observer or intra-observer measurements of waist circumference [ 46 ], or other body circumferences, could not be gleaned from the literature, Verweij et al.
As shown in Table 2 , the technical error of measurement for home self-, participant lab self-, and technician- duplicate measurements indicated very minor differences i. Table 2 also reports means, ranges, and ICC for measurements.
All ICCs comparing participant home vs participant lab, participant home vs technician, and participant lab vs technician met the benchmark for near perfect agreement i. A comparison of the duplicate technician and self-measurements indicated high measurement repeatability because little difference occurred between the paired measurements for any circumference i.
A comparison of the participant home and participant lab self-measurements was conducted to establish test-retest reliability. The ICCs for these intra-observer measurements were very high see Table 2.
Despite the significant difference between home and lab waist and neck self-measurements, the mean difference was negligible i. Figure 2 illustrates the differences between participant home self-measurements and technician waist circumference measurements.
The mean difference bias indicates that participant waist circumferences were about one-half inch larger than technician measurements; however this measurement did not differ significantly between technician and participant home measurements and did not demonstrate systematic bias.
A comparison of differences indicated the vast majority i. All three of these cases also had differences outside the standard for one other circumference 1 hip and 2 neck. The upper and lower tolerance limits show the potential agreement expected if similar measures are taken with different samples in the future [ 56 ].
Legend: Diamond shapes are individual observations calculated as home self-measurement — technician measurement; hence positive values indicate self-measurement was larger than technician measurement and vice versa. The mean difference between home and technician hip measurements was about one-fifth of an inch.
Participant home hip measurements did not differ significantly from technician measurements and there was no systematic bias. As with waist measurements, the vast majority i. Both cases also had differences outside the standard for one other circumference 1 waist and 1 neck. The mean difference between home and technician neck measurements showed a slight positive systematic bias, with participant measurements being consistently larger than technician measurements by an average of about eight-tenths of an inch Fig.
Home measurements were significantly greater than technician measurements. Most i. Two of these cases had measurements outside the standard for one other circumference both were for waist. An examination of the tape measures participants made at home indicated that nearly all followed the online instructions and assembled the measuring tapes correctly. Only three participants did not correctly assemble the measuring tape.
Their most common error was not taping pieces of the tape measure together at the correct locations; despite this error, measurements from two of these women were very similar to technician measurements whereas the third woman underestimated measures by more than 2 inches.
To further improve ease, participants suggested making the dotted cutting lines darker to help them cut the paper tape straight. Participants had limited suggestions for refining the instructional video. A few felt more information on how to identify the widest part of their hips was needed beyond the pictures depicting this in the video.
Errors observed in some participants were not keeping the tape measure flat, placing the tape measure at incorrect locations on waist or hips, wearing inappropriate clothing or not removing clothing, and incorrectly reading measurements on the tape measure. The aim of this study was to evaluate the test-retest reliability and criterion validity of self-measurements taken by novice lay persons using a self-assembled tape measure after viewing a brief online instructional video.
Results indicate that participants were able to accurately assemble the tape measure and demonstrate proficiency in measuring themselves when observed by lab technicians. The low technical error measurements and high reliability for duplicate measurements demonstrates excellent intra-observer accuracy and reliability. The high ICCs between participant home and lab waist, hip, and neck circumferences indicate that participant self-measurements are highly reliable over time, which is congruent with the limited research reporting reliability of self-measurements [ 10 , 36 ].
The high ICCs between participant home and technician criterion measurements for all circumferences indicate measurements made by lay people using paper self-assembled tape measures and a brief online training video are comparable to those of trained health professionals using research-grade equipment and, thus, demonstrate good criterion validity.
This finding also suggests that it is feasible to cost-effectively gather accurate self-measurements using a flexible, inelastic paper tape measure self-assembled from a pdf downloaded from the internet for large scale consumer surveys and intervention studies where participants are geographically distant from researchers and, thus, cannot easily visit anthropometric labs for measurement by trained technicians.
The mean differences in waist, hip, and neck circumferences between participants and technicians were small 0. The upper and lower LOA and absolute difference for waist circumference in this study also are well within the values reported by others [ 7 , 10 , 34 , 35 , 37 , 38 , 41 — 44 , 49 , 69 ]. Also, like other studies, there were no significant differences in mean waist and hip circumferences measured at home and in the lab by technicians [ 38 , 41 ].
No comparable studies could be found for neck circumference, however the limited research available indicates high agreement for this measure among trained observers [ 71 ].
The vast majority of waist and hip circumference self vs. An even tighter agreement between participant and technician circumference measurements would further enhance the utility of self-measurements and may be feasible to achieve.
This difference likely is because of the many factors affecting waist circumference throughout the day, including posture, time of day variations in height, fasting vs postprandial state [ 46 , 51 , 58 , 69 , 72 ], as well as the time gap between home measurements and lab measurements mean 9.
It is important to consider that some differences between technician and participant measurements may be due to the dissimilarity in measurement precision each used. Additionally, consumers frequently have difficulty accurately interpreting markings denoting fractional quantities when performing measurements [ 73 ].
For the most accurate waist and hip measurements, experts recommend standing with feet together, arms at the side, wearing little clothing, being in a fasted state, taking measurements at the end of a normal expiration with the abdomen relaxed, and taking measurements twice and averaging measurements repeatedly until they are within 1 cm of each other [ 17 ].
Because the participants in this study were taking their own measurements, they could not keep their arms at their sides or feet together. However, the video did instruct them to wear minimal clothing, read the measuring tape after taking a deep breath in and letting it out, put tension on the tape measure by pulling it gently to be sure it sat flat on the skin but not to pull it tight, and take measurements twice.
Additionally, the video repeated instructions for measuring each circumference twice and each time directed them to ensure that the tape measure ran straight across their back waist , buttocks hips , or neck and encouraged them to use a mirror to check accuracy of tape measurement placement.
Additionally, Yoon recommended enlisting the assistance of a partner when taking self-measurements because she observed this improved the accuracy of measurements [ 69 ]. This study has many important strengths. The tape measure and videos underwent formative cognitive testing by experts trained in qualitative data collection methods and subsequently refined to ensure participant comprehension.
Technicians were rigorously trained and had excellent inter-rater reliability scores. In addition, this study is one of the first of its type to include intra-observer technical error measurement and reliability [ 51 — 54 ] as well as test-retest reliability data for self-measurements [ 10 , 36 ].
Although creating the tape measure does place some participant burden e. This study is among the few of its type to report confidence intervals for waist, hip, and neck circumferences differences and limits of agreement [ 34 , 43 , 44 ]. Importantly, this study provides the recommended reporting data for Bland-Altman analysis of agreement between measurements taken by technicians vs self.
Clinically meaningful levels are rarely reported [ 20 , 21 , 56 ]; this study also is the first known to the authors to propose a clinically meaningful difference in agreement for body circumferences. This study has numerous strengths, however, the results are limited by the size and homogeneity of the sample i. Additionally, studies should explore possible training effects e. Furthermore, an investigation of the effect of providing an interpretation of the measurements to consumers e.
This study has demonstrated that a simple, inexpensive method for teaching individuals to take their own body circumferences provides reliable and suitably accurate data.
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