Calculating your daily calories to eat is straightforward once you know the Calorie Deficit formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Calorie Deficit Calculator.
What is Calorie Deficit?
The Calorie Deficit calculation tells you your daily calories to eat from a few simple inputs. The figure you are solving for here is the daily calories to eat.
The Calorie Deficit formula
The core formula is:
Daily calories to eat = Maintenance calories (TDEE) - Daily calorie deficitHere is what each input means:
- Maintenance calories (TDEE) — a value measured in kcal. Example: 2,500 kcal.
- Daily calorie deficit — a value measured in kcal. Example: 500 kcal.
How to calculate it step by step
- Write down the maintenance calories (tdee) (for example, 2,500 kcal).
- Write down the daily calorie deficit (for example, 500 kcal).
- Apply the formula above to get your daily calories to eat.
- Double-check the result with the Calorie Deficit Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Maintenance calories (TDEE) | 2,500 kcal |
| Daily calorie deficit | 500 kcal |
| Daily calories to eat | 2,000 |
| Estimated weekly weight loss | 0.45 |
| Estimated monthly weight loss | 1.95 |
With maintenance calories (tdee) of 2,500 kcal and daily calorie deficit of 500 kcal, the daily calories to eat works out to 2,000.
Example 2
With maintenance calories (tdee) of 5,000 kcal and daily calorie deficit of 500 kcal, the daily calories to eat works out to 4,500.
| Result | Value |
|---|---|
| Daily calories to eat | 4,500 |
| Estimated weekly weight loss | 0.45 |
| Estimated monthly weight loss | 1.95 |
Example 3
With maintenance calories (tdee) of 1,300 kcal and daily calorie deficit of 500 kcal, the daily calories to eat works out to 800.
| Result | Value |
|---|---|
| Daily calories to eat | 800 |
| Estimated weekly weight loss | 0.45 |
| Estimated monthly weight loss | 1.95 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
- These figures are general estimates, not medical advice — check with a qualified professional before acting on them.
Prefer not to do the maths by hand? — the Calorie Deficit Calculator does it instantly, for free, with the formula and a worked example built in.
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