Lose Weight by Date Calculator
Have a wedding, holiday, or event on the calendar? Enter your goal weight and target date, and we'll work out the daily calories to get you there — with a projection straight to your deadline.
Your details
Projection to your target date
The dashed line marks your goal weight.
Most calculators tell you how fast you'll lose weight at a fixed deficit. This one works backwards: you tell it where you want to be and when, and it calculates the daily calorie target required to get there. It spreads the total weight change evenly across the days remaining, checks the pace is realistic, and plots the whole journey to your date — with your goal weight marked as a reference line.
How the lose-weight-by-date calculator works
First we estimate your maintenance calories (TDEE) from your stats. Then we take the difference between your current and goal weight, convert it to calories using the 7,700-kcal-per-kilogram estimate, and divide by the number of days until your target date. That daily figure is subtracted from your maintenance to give the number you should eat each day.
The projection line shows your expected weight for every week between now and your deadline, with a dashed line at your goal so you can see exactly when the two meet. Move your date or goal weight and the whole chart re-draws instantly.
What if my target date isn't realistic?
If your deadline would require eating below the safe minimum — 1,200 calories for women or 1,500 for men — the calculator raises your target to that floor and flags it, because faster isn't better when it costs you muscle and energy. It also warns you when the required pace exceeds roughly 1% of your bodyweight per week, a common guideline for sustainable fat loss.
If you see a warning, the fix is simple: pick a later date. A slightly longer timeline almost always means a more comfortable diet and results that actually stick once the event is over.
Frequently Asked Questions
It calculates the total weight you want to lose, converts that to calories (about 7,700 per kilogram), and divides by the days until your target date. That daily amount is subtracted from your maintenance calories to give the number you should eat each day.
Within reason. The calculator won't set a target below 1,200 calories (women) or 1,500 (men), and it warns you if your chosen date requires losing more than about 1% of your bodyweight per week. If you hit those limits, choose a later date.
It can be, as long as the pace is moderate. Aim for no more than about 0.5–1% of your bodyweight per week. Crash diets to hit an aggressive deadline tend to backfire with muscle loss, fatigue, and rebound weight gain.
A closer date means the same weight change is spread over fewer days, so you need a bigger daily deficit and a lower calorie target. A later date spreads it out, raising your daily calories and making the diet easier.
Yes. As you get lighter you burn fewer calories, so re-enter your current weight every couple of weeks to keep your projection accurate.
These results are estimates for general educational purposes only and are not medical or nutritional advice. Individual needs vary. Consult a qualified healthcare professional or registered dietitian before making significant changes to your diet, especially if you are pregnant, breastfeeding, under 18, or have a medical condition.