How to take a mirror selfie for a body fat estimate

The photo matters as much as the AI. Seven steps for a clean, comparable shot, about a minute of setup.

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  1. 1

    Use even, front-facing light

    Face a window or stand under a bright, diffuse light. Harsh overhead light or a single side lamp creates shadows that look like muscle definition (or hide it), which skews any estimate, human or AI.

  2. 2

    Wipe the mirror and silence the glare

    A smudged mirror or a flash glare across your torso hides the waist. Turn the flash off and clean the area in frame.

  3. 3

    Stand relaxed, not flexed

    Stand tall with arms slightly away from your sides and your stomach relaxed. Flexing or sucking in changes the shape you are trying to measure, and makes comparisons over time unfair.

  4. 4

    Wear fitted or minimal clothing

    Shirtless, a sports bra, fitted shorts or a fitted top. Baggy clothes make the waist unreadable and lower the confidence of the estimate.

  5. 5

    Frame the torso from chest to mid-thigh

    Hold the phone at about chest height, level, and far enough back that your full torso and waist are in frame. Do not cut off the waist, and avoid tilting the phone up or down, which stretches proportions.

  6. 6

    Take a front shot (and a side shot if you like)

    A front view is the one the estimator is built around. A side view can help you judge your belly profile yourself, but upload the front photo for the AI estimate.

  7. 7

    Repeat the same way next time

    Same spot, time of day, light and pose. If you re-test, only the body should change, so the difference you see is real.

Common mistakes

  • Flexing, sucking in, or posing differently each time.
  • Flash glare, a dirty mirror, or the waist cropped out of frame.
  • Baggy clothing, or a filter or beauty mode on the camera.
  • Comparing a morning photo with an evening one after a big meal.

Photo ready? Get your estimate.

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Upload a photo → AI estimate (free)

Your photo stays private.We analyze it once, then throw it away. Never saved, never shared, no account needed.

Frequently asked questions

How do I take a photo to estimate body fat?

Stand relaxed (not flexed) facing a mirror in good, even light, wearing fitted or minimal clothing, with your torso and waist fully in frame. Keep the phone level at about chest height and turn the flash off. Use the same setup each time you re-test.

Should I flex or stand relaxed?

Relaxed. Flexing shows muscle shape but not how much fat covers it, and it makes progress photos hard to compare. The baisics estimator is built around a relaxed, front-facing torso photo.

Does lighting really change the estimate?

Yes. Strong side or overhead light adds shadows that read as definition, and dim light flattens everything. The baisics estimator lowers its own confidence for poor lighting, baggy clothes or a partial view.

Is a mirror selfie as accurate as a gym scan?

No. A photo estimate is the fastest and cheapest option but the least precise. We have not validated the tool against DEXA, so treat the result as a range and watch the trend. Details are in the estimator FAQ.

Is my photo stored?

No. baisics does not save your photo. It is sent to our AI provider for that single analysis and discarded.