TDEE Calculator From Your Weight Trend
Formulas estimate your needs from height, age and activity. Your weight trend measures them. Enter your weigh-ins and your average calorie intake: the change in your trend weight shows how much you actually burn. For losing, maintaining, bulking and cutting.
Your data never leaves your browser
The calculation runs entirely on your device. No upload, no account and nothing stored on our server.
Order and separators don't matter, comma or dot as decimal mark. Several weigh-ins on the same day are averaged.
Drop a file here or
Apple Health (export.zip or export.xml), Withings (weight.csv or ZIP), Google Fit (Takeout CSV), Happy Scale, Libra, openScale, Trendcurve and any CSV with a date and a weight column.
Your result Example data
This is made-up example data covering twelve weeks, so you can see what a result looks like. Paste your own weigh-ins above.
Budget for your target pace
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Your calorie budget from your trend, every day
Trendcurve recalculates your trend after every weigh-in and shows your weekly rate for free. With Pro you get the calorie budget: maintenance calories via Mifflin-St Jeor or with active energy from Apple Health, your current daily balance from your measured weekly rate and the target budget for your desired pace.
Why your weight trend beats a formula
Formulas such as Mifflin-St Jeor estimate your resting metabolic rate from height, weight, age and sex and multiply it by an activity factor. The Trendcurve app states an uncertainty of 10 to 15 percent for this. At 2,500 kcal that is 250 to 375 kcal, often the difference between losing and maintaining.
Your weight trend measures the outcome instead: if your trend falls at a given intake, you were in a deficit, and by roughly as much as the change in your trend shows. You don't need a formula for that, just two things: regular weigh-ins and an honest estimate of how much you ate in the same period.
How the calculator works
- Your weigh-ins are turned into a trend weight with exponential smoothing, exactly like in the Trendcurve app. Daily swings from water and salt drop out.
- The change per week is the slope of a regression line through the trend values of the selected period. For 14 days this is exactly the weekly rate of the app.
- One kilogram of body weight corresponds to about 7,700 kcal. A trend of minus 0.5 kg per week therefore means a deficit of roughly 550 kcal per day.
- Your expenditure is your average intake minus this daily balance. At 2,000 kcal intake and a 550 kcal deficit it is about 2,550 kcal.
How to get a reliable result
- Use at least two, better four weeks. The longer the period, the less a few poorly logged days matter.
- The intake has to match the period. If you averaged 2,100 kcal over the last 28 days, choose 28 days as well.
- After a change (new diet, creatine, much more or fewer carbs) water shifts first. Wait one to two weeks before you calculate.
- When bulking, a rising trend shows a surplus. The calculator works in both directions.
- 7,700 kcal per kilogram is an average for fat tissue. At the start of a diet and while building muscle the real energy density differs.