Calorie Calculator
Estimate maintenance calories and a daily target for weight loss, maintenance, or weight gain.
Disclaimer: This calculator provides educational estimates only. It is not medical advice, diagnosis, contraception guidance, or a substitute for a qualified healthcare professional.
Calorie Calculator
A calorie calculator estimates how many calories you may need each day for maintenance, weight loss, or weight gain. This version can either use maintenance calories that you already know or derive maintenance from the same resting energy and PAL logic used in the TDEE calculator.
What This Calculator Estimates
The calculator produces two planning numbers:
| Result | Meaning |
|---|---|
| Maintenance calories | A starting estimate for weight stability |
| Target calories | Maintenance adjusted for your chosen goal |
How to Use the Calorie Calculator
- Choose whether to enter maintenance calories directly or calculate them from TDEE inputs.
- If using TDEE inputs, enter sex, age, height, weight, and a preset or custom PAL value.
- Select your goal: maintain, lose weight, or gain weight.
- If losing or gaining weight, enter the size of the daily adjustment in kilocalories.
- Review maintenance calories, target calories, and any warning about aggressive adjustments.
Calorie Calculator Formula
Maintenance calories = TDEE or direct maintenance input
Target calories = maintenance calories + daily adjustment
For weight loss, the daily adjustment is treated as a deficit. For weight gain, the same field is treated as a surplus.
Example Calorie Calculation
If maintenance calories are 2,300 kcal/day and the goal is slow weight loss with a 300 kcal/day deficit:
Target calories = 2,300 - 300 = 2,000 kcal/day
If maintenance calories are 2,398 kcal/day from the TDEE workflow and the goal is weight gain with a 250 kcal/day surplus:
Target calories = 2,398 + 250 = 2,648 kcal/day
Choosing a Daily Adjustment
| Goal | Typical planning approach |
|---|---|
| Maintain | No adjustment |
| Lose weight | Moderate deficit from maintenance |
| Gain weight | Moderate surplus above maintenance |
Large changes can be harder to sustain. The calculator flags aggressive deficits and also warns when a weight-loss target drops below estimated resting energy expenditure.
Accuracy and Limits
Daily calorie needs vary with body composition, occupation, step count, training volume, dieting history, medications, pregnancy, illness, and other factors. Use the result as a starting point, then adjust based on body-weight trends, energy, hunger, and performance over two to four weeks.
FAQs
Is this calorie target exact?
No. It is a planning estimate, not a guarantee or medical prescription.
Should I use direct maintenance or TDEE mode?
Use direct maintenance if you already have a maintenance estimate from tracking. Use TDEE mode if you want the calculator to derive maintenance from body measurements and activity level.
Why does the calculator warn about aggressive deficits?
Very large deficits can be difficult to maintain and may reduce training quality, recovery, and day-to-day energy. The warning is there to keep the result educational rather than prescriptive.
Why can the result be different from another calculator?
Different calculators use different resting-energy formulas, activity factors, goal adjustments, and rounding rules.
What should I do after getting a target?
Follow the target consistently for a few weeks, review your actual weight trend and performance, then adjust gradually if needed.