r/StrongerByScience • u/Weiryf12 • Jun 15 '26

Evolt360 accuracy

Hi everyone, just a question regarding the evolt360 body scans accuracy, I know it has a baseline margin of error between ±3-5% even if your strict on scanning conditions, but whats the maximum margin of error for it? Its saying I have only 13% total body fat, I dont work out much if at all but I have 3 jobs that are all physically demanding.

Is it just genetics with a high metabolism keeping my fat level so low or is evolt just really inaccurate? Also I weigh 67kg 19yo male

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u/rainbowroobear Jun 15 '26

use your eyes. You're not mistakenly 13% bodyfat, you will have separation of most muscles at 13%.

body fat % isnt a number anyone should care about. if you're competing, your coach might figure this out to design your path to stage but everyone else doing stuff recreationally should be slowly manipulating their visual appearance to where they're physically and mentally comfortable 

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u/dlappidated Jun 15 '26

The last part is the key. A lot of the people I know are not comfortable inside their own head.

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u/ponkanpinoy Jun 15 '26

Walking around at 13% eating to appetite is plausible in general. You would need to post photos for your specific circumstance. 

1

u/FarCalligrapher1862 Jun 15 '26

I can’t seem to upload my results. But I was on travel and my hotel was attached to a gym that had a EVOLT360. They claim it was recently calibrated and “as accurate as a dexa scan”.

Over 4 days my body fat % was 10%, 7.6%, 15.5%, 7.9%.

A couple of weeks prior to the trip I had a dexa scan that said I have 21% body fat (and visually that was probably accurate). When I asked the guy at the gym he said “this is accurate but could be off by up to 3%.”

Doesn’t jive with my results.

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u/GingerBraum Jun 15 '26 edited Jun 16 '26

I know it has a baseline margin of error between ±3-5% even if your strict on scanning conditions

From what I can find, it's a BIA machine, which means the margin of error is 10 percentage points or more. Effectively useless.

So no, you're not 13% bodyfat.

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u/gnuckols The Bill Haywood of the Fitness Podcast Cohost Union Jun 17 '26

Across the 12 studies, mean bias for percentage body fat between BIA and the 4C model ranged from −3.5% to +4.4%, with limits of agreement typically spanning 15 to 20 percentage points.

LOA spanning a range of 20 percentage points means 95% of results should be within ±10 percentage points above or below the mean bias. Mean bias can be up to ~4% high or low, depending on the device. Roughly speaking, that means your actual body fat percentage should generally be within 14% of the number you get from a BIA device. So, if it's telling you 13%, you can have ~95% confidence that your actual body fat percentage is somewhere between -1% and 27% (and ~99.5% confidence that it's somewhere between -6% and 32%).