Weight loss goal date calculator

What date would you reach your goal if your chosen weekly pace continued? Enter a starting weight, goal and pace to explore the arithmetic. The result does not predict or recommend a rate of weight change.

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How the date is worked out

Weeks = weight change needed ÷ weekly change toward goal

Going from 90 kg to 80 kg at 0.5 kg a week takes 20 weeks in this calculation. The tool multiplies the weeks by seven and rounds up to a whole calendar day. It also handles a goal above your starting weight, labelling that scenario as weight gain.

Why the date will change

This is a constant-pace scenario. It does not model changes in energy use, food intake, water weight or activity. Halving the pace doubles the time in the calculation. Your actual pace may change, and the date becomes less informative the further ahead you project.

For a model that considers calories and activity, NIDDK’s Body Weight Planner offers a different approach. It is intended for adults, excluding pregnancy and breastfeeding.

A chosen pace and a measured pace

This calculator uses the pace you type. Downtrend estimates a goal date from your recorded weight trend instead, so its estimate changes as your recent pace changes. Neither date is a deadline or a guarantee. Read why the weight trend lags behind the scale to understand how smoothing affects that view.

Sources

1. NIDDK. About the Body Weight Planner. A calorie and activity planning model, separate from this page’s constant-pace arithmetic.

These calculators give estimates for adults, not a diagnosis. Nothing you type leaves this page.