---
title: What Is My Body Fat Percentage? 5 Ways to Check at Home
url: https://progresslens.app/guides/what-is-my-body-fat-percentage/
language: en
updated: 2026-11-13
---

# What is my body fat percentage? Five ways to find out at home

By the [ProgressLens team](https://progresslens.app/about/) · Updated November 13, 2026

From a free chart to AI: how each method works, how accurate it is, and which to use for tracking.

Short answer

The easiest accurate home method is a tape measure: neck, waist (and hips for women) plus height in the US Navy formula, within about 3–4 points. Comparing with a body fat photo chart is quicker but rougher. AI photo estimates vary with lighting; combining photos with tape measurements, as ProgressLens does, gives a steadier range.

**On this page**
- [Five ways, compared](#methods)
- [1. Compare with a chart](#chart)
- [2. Use a tape measure](#tape)
- [3. Ask an AI](#ai)
- [4. Track it, don’t just measure it once](#track)
- [FAQ](#faq)

## Five ways, compared

| Method | Typical error | Cost | Best for |
| Compare with a photo chart | 5+ points | Free | A first guess |
| Tape measure (US Navy) | About 3–4 points | Free | Repeatable tracking |
| Smart scale (BIA) | 3–5 points, swings with water | $30–150 | Trends, same conditions |
| AI photo estimate | Several points, swings with light | Free–subscription | A quick read |
| Photos + tape + history (ProgressLens) | A range, steady between check-ins | Subscription | Tracking change |

## 1. Compare with a chart

Find the level that looks most like you in the [body fat chart](https://progresslens.app/body-fat/) (men and women, 6% to 45%). Be honest about lighting: gym mirrors flatter.

### A steady range from photos and tape.

ProgressLens lines up every photo with your last one, then AI Analyze tells you your body-fat range, what changed, fat vs muscle, and whether to cut or bulk. iPhone and Android, private, no account.

## 2. Use a tape measure

Measure your neck below the larynx and your waist at the navel (women add hips at the widest point), then enter them with your height in the [body fat calculator](https://progresslens.app/tools/body-fat-calculator/). Read [how to measure body fat with a tape measure](https://progresslens.app/guides/how-to-measure-body-fat-with-a-tape-measure/).

## 3. Ask an AI

ChatGPT and AI apps can estimate from a photo, but different chats give different numbers. Use a careful prompt (see [the ChatGPT body fat prompt](https://progresslens.app/guides/chatgpt-body-fat-prompt/)) and treat the answer as a range.

## 4. Track it, don’t just measure it once

Body fat changes slowly, so the trend matters more than any reading. Same method, same conditions, every two to four weeks, beside matched photos.

FAQ

## Frequently asked questions

**How can I tell my body fat percentage without calipers?**

Use a tape measure and the US Navy formula, or compare with a body fat photo chart.

**Can I find my body fat percentage from a picture?**

Roughly. A photo gives a first guess within several points; adding tape measurements makes it steadier.

**Is there an app that tells you your body fat percentage?**

Yes. See [apps that measure body fat](https://progresslens.app/guides/is-there-an-app-that-measures-body-fat/).

## Keep reading

[Body fat with a tape measureThe US Navy method, step by step.Read more →](https://progresslens.app/guides/how-to-measure-body-fat-with-a-tape-measure/)[Can ChatGPT estimate body fat?How accurate AI estimates are.Read more →](https://progresslens.app/guides/can-chatgpt-estimate-body-fat/)[Should I bulk or cut?A simple answer by body fat, with rates.Read more →](https://progresslens.app/guides/should-i-bulk-or-cut/)

---
ProgressLens is an AI progress photo app for iPhone, iPad and Android that turns your check-in photos and tape measurements into a Progress Report: your body-fat range, what changed, whether you are losing fat or muscle, and whether to cut, lean bulk, recomp or maintain.
App Store: https://apps.apple.com/app/progresslens/id6806300575
Google Play: https://play.google.com/store/apps/details?id=app.progresslens