Track your progress · Free calculator

Weight change calculator

Calculate weight lost or gained, percentage change, and the average weekly change between two measurements.

Free to use. No account required.

Example values are prefilled. Replace them with your own values to calculate your result.

Starting weight (lb)Weight unitApplies to both weights.

Current weight (lb)Starting measurement dateCurrent measurement date

Weight lost

10 lb

Percentage lost

Average lost per week

2 lb

Across 35 calendar days. Values are rounded to two decimal places; calculations retain full precision.

Keep this calculation in this tab for up to two hours, then sign in to review it during setup. Nothing is added to your account until you save.

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