Enter your current and goal weight and a weekly pace for an instant date. Or paste your recent weigh-ins and get the date your actual trend points to. Free, kg or lb, no sign-up.
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Goal weight date calculator
Projected goal date
May 1, 2027
About 30.0 weeks (210 days) · 0.50 kg/week (0.59% of body weight)
Within commonly cited weekly ranges — not medical advice.
How we got this
You want to lose 15 kg. At 0.50 kg per week, that is about 30 weeks (210 days). Starting from October 3, 2026, that points to May 1, 2027.
Straight-line estimate; real progress usually slows as you get lighter.
This is a planning tool, not medical advice. Commonly cited pace ranges are for general reference only — talk to a doctor for health goals, especially if you are pregnant, under 18, or have a medical condition.
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The calculator shows a projected date, weeks remaining, and your weekly rate in kg or lb and as a percentage of body weight. Pace-band notes compare your rate to commonly cited ranges — they are not medical advice. A straight-line date is usually optimistic; as you get lighter, the same habits often produce a smaller deficit, so the real date tends to land later.
Weeks to goal = (current weight − goal weight) ÷ weekly rate. Goal date = today + weeks × 7 days.
Reverse mode: pick a target date and the calculator returns the weekly pace required (weight to lose ÷ weeks until your date).
Assumes a constant rate forever. The 7,700 kcal per kg (3,500 per lb) rule is a rule of thumb. Good for planning before you have data.
With two dated weigh-ins, we estimate your weekly rate. With a pasted history, we fit a straight line through your entries (least squares) and project where it crosses your goal. Water, salt and carbs make the scale jump day to day — a trend line is steadier than your latest reading.
Your scale is better evidence of what you are actually doing. Gaps in logging, an overestimated deficit, or the early water drop are common reasons the plan date is earlier than the trend date. Both are still estimates.
As body weight falls, energy needs fall, so the same diet produces a smaller deficit over time. There is some extra metabolic adaptation, plus real-life adherence. The early-weeks drop is mostly water and glycogen. For calorie planning, see the NIH/NIDDK Body Weight Planner.
Weigh under the same conditions each time — morning, after the bathroom, before eating. At least 7 days of weigh-ins for a first estimate; two or more weeks gives a steadier date. The projected date will move a little as you log — that is expected. A steady drift later or earlier is the signal worth acting on. See how a flat trend affects your goal date. Read how the forecast is calculated.
Commonly cited guidance is roughly 0.5–1 kg (1–2 lb) per week, or about 0.5–1% of body weight per week. Faster is harder to sustain. This is general information, not a personal prescription — talk to a clinician if you are pregnant, under 18, or have a medical condition.
Weight Forecast: a free web app that projects your goal-weight date from your weigh-ins. Log morning weight and the projected date recalculates on every entry. Garmin and Strava sync; Telegram coach; works offline as an installable web app. Pricing: Free.
How the app calculates your date · Garmin & Strava sync · Compare to paid trackers · Compare to Happy Scale
Subtract your goal from your current weight, divide by your weekly rate of loss, and add that many weeks to today. 10 kg at 0.5 kg a week is 20 weeks. For a date based on your real progress, use your weigh-in trend instead of a guessed rate.
It reflects what you're actually doing rather than what you plan to do, so it catches a plan that isn't working. It's still an estimate. It assumes your recent trend continues, and real loss usually slows over time.
At least 7 days for a first estimate; 2 weeks or more gives a steadier date. Weigh under the same conditions each time, ideally in the morning before eating.
Each weigh-in updates the trend. Water, salt, carbs and timing move the scale day to day, so the date shifts a little. A steady drift later or earlier is the signal worth acting on.
Straight-line calculators assume a constant deficit. As you get lighter you burn a bit less, so the same intake produces a smaller deficit, and adherence varies. Expect the real date to land later than a simple projection.
At 0.5 kg a week, about 20 weeks; at 1 kg a week, about 10. Use the calculator for your own numbers and a date.
Commonly cited guidance is roughly 0.5–1 kg (1–2 lb) a week, or about 0.5–1% of body weight. Faster is harder to sustain. If you have a medical condition, are pregnant or are under 18, ask a clinician first.
Yes. Enter a target date in Plan mode and the calculator shows the weekly pace it requires, and flags it if that is faster than the usual range.
Yes. Switch units at any time.
The calculator is free with no sign-up. Create a free account only if you want the date to update automatically as you log.
Not yet. It's built for weight-loss goals.