BeslyWeight loss calculator
Enter where you are, where you want to be and how fast. You get a daily calorie target and an honest date — with a safety floor so the maths never asks for a crash diet. Runs in your browser; nothing is stored.
How this is calculated
Maintenance calories come from the Mifflin-St Jeor equation times your activity level. A kilogram of body fat is roughly 7,700 kcal (about 3,500 per pound), so losing 0.5 kg a week needs a deficit of about 550 kcal a day.
The date assumes you hold that deficit. In practice, loss is faster in the first weeks (water and glycogen) and slows as you get lighter, because a smaller body burns less. We recalculate maintenance at your goal weight and use the average of the two, which is closer to what really happens than a straight line.
The date only holds if the deficit does. Besly sets this target for you, logs meals from a sentence or a photo, and its coach watches your real weight trend against the plan. Get Besly →
Filling meals for a deficit
High-protein, low-calorie recipes · Meals under 300 calories · Meals under 400 calories · Macro calculator
Not medical advice. If you have a medical condition, are pregnant or under 18, talk to a doctor or dietitian. Sources.