TDEE Calculator
Last updated: June 2026 · Free · No sign-up required
Enter values above and click Calculate to see your result instantly.
Quick reference
| Activity level | Multiplier | Description |
|---|---|---|
| Sedentary | 1.20 | Desk work, little exercise |
| Light | 1.375 | Light exercise 1–3 days/week |
| Moderate | 1.55 | Training 3–5 days/week |
| Very active | 1.725 | Hard exercise most days |
| Extra active | 1.90 | Physical job plus hard training |
monitor_weight A starting point, not a diagnosis
This calculator gives you the same number a clinician would compute by hand from your inputs. It is informational, never a substitute for a doctor. If a result surprises you, write it down and discuss it at your next appointment — that conversation is the goal, not a verdict from a webpage.
science Built from peer-reviewed formulas
Every health calculator on CalcaTools uses an equation from the WHO, NIH, ACOG, CDC, or a published peer-reviewed paper. The exact citation is in the "Formula & methodology" section. We re-check sources quarterly and update the page when guidance changes — the "Last reviewed" date is at the top.
volunteer_activism Designed for real people
Health calculations only help if you can actually use them. We use plain-English labels (no jargon), accept both metric and US units, and show what a "normal" range looks like alongside your result — so you understand what the number means, not just what it is.
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Your weight, height, age, pregnancy details, and any other health input never leave your browser. Calculations run client-side; nothing is logged or stored on our side. We don't want your medical data — we just want the formula to work for you.
Interpretation guide
| Goal | Starting target |
|---|---|
| Fat loss | TDEE − 300 to 500 kcal/day |
| Maintenance | Around TDEE |
| Lean gain | TDEE + 150 to 300 kcal/day |
Formula & methodology
Formula: TDEE = BMR × activity multiplier
TDEE starts from BMR, then multiplies by activity. The activity multiplier is the largest source of error, so use 2–4 weeks of body-weight trend data to calibrate.
Authoritative source: IOM Dietary Reference Intakes