Log waist, chest, hips, arms and thighs, and watch each one's trend on its own chart — because a tape measure catches changes the scale never shows. Saves in your browser. Free.
| Date | Waist | Chest | Hips | Arms | Thighs | Notes |
|---|
💾 Saves in this browser only. Leave any field blank if you didn't measure it that day. Entering a date that already exists updates that entry. Record-keeping only — not medical advice.
Key takeaways:
A body measurement tracker logs tape-measure numbers — waist, chest, hips, arms, thighs — over time, rather than a single number like body weight. It exists because body composition can change in ways the scale won't show: waist down and arms up with the scale barely moving is a completely different result than the same number reflects on its own.
Each measurement gets its own trend line so you can see exactly where change is (or isn't) happening, instead of trying to read five numbers in a table at once.
Weight alone can't distinguish muscle gain from fat loss — both can leave the scale flat while your shape changes considerably. Tape measurements catch that: a shrinking waist alongside stable or growing arms is a clear body-composition signal a bathroom scale simply can't give you. Track a few key points instead of everything, so the noise-to-signal ratio stays manageable.
Pair this with the Weight Journal for the scale side of the picture, and the BMI Calculator or our BMI Tracker & History for the height-weight ratio over time.
What measurements can I track?
Waist, chest, hips, arms and thighs, all in centimetres, plus a notes field for anything else. Use the chart dropdown to see the trend for any one of them.
How often should I take body measurements?
Every 2–4 weeks is common — muscle and fat changes are slow, so weekly measuring often just captures normal day-to-day fluctuation like water and bloating.
Where is my measurement data stored?
Entirely in this browser's local storage, on this device. Nothing is uploaded. Export a CSV as a backup or to share with a trainer.
How do I measure consistently?
Same tape position, same time of day, same tension on the tape, ideally first thing in the morning before eating. Inconsistent technique is the biggest source of noise in the numbers, not real change.
Can I edit an entry?
Add an entry with the same date and it replaces the original — handy for correcting a typo.
Is this different from the BMI Calculator?
Yes — BMI is one number from height and weight. This tracks the actual tape-measure numbers for individual body parts over time, which BMI can't show at all.