Calorie Deficit Calculator - Find Your Daily Target for Weight Loss

A calorie deficit is the single mechanism behind all fat loss. When you consistently consume fewer calories than your body burns, it draws on stored fat to make up the difference. This calculator finds your personal calorie deficit target based on your body stats, activity level, and how quickly you want to lose weight.

Calorie Deficit Calculator

Find your daily calorie target for weight loss based on your body stats and goal pace.

Your Details

Your Daily Calorie Target
calories / day
Maintenance
cal
Daily Deficit
cal
Weekly Loss
kg
Monthly Loss
kg
How Your Target Was Calculated
Basal Metabolic Rate (BMR)
Activity Multiplier
Total Daily Energy Expenditure (TDEE)
Calorie Deficit Applied
Your Daily Target
Now Track Your Deficit Daily with Welling
Log meals by chat or photo. Welling's AI checks you are hitting this target every day and coaches you when you are not.

Calculated using the Mifflin-St Jeor equation. Results are estimates for guidance only. Consult a healthcare professional for personalised medical advice.

How to Use Your Calorie Deficit Result

Your calorie deficit target is the daily calorie intake that creates the energy gap needed for your target rate of weight loss. A deficit of 500 calories per day produces approximately 0.5 kg of fat loss per week. A deficit of 250 calories per day produces slower, more sustainable progress with less impact on energy and muscle mass.

The number from this calculator is your starting point. Track your actual intake against this target using Welling's AI calorie tracker to verify you are hitting it consistently — and let the AI coaching adjust your approach if your real-world results differ from the projection.

Track Your Calorie Deficit Daily With Welling