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TDEE for Weight Loss

500 kcal deficit ~ 1 lb/week. Free online TDEE for Weight Loss. Calculate tdee for weight loss online — fast, accurate, mobile-friendly, no signup needed.

TDEE = BMR × activity multiplier.
Target kcal
2,000

Derivation

  1. ├── 01Giventdee = 2500, pct = 20
  2. ├── 02Formulae.tdee × (1-e.pct / 100)
  3. ├── 03Substitutee.2500 × (1-e.20 / 100)
  4. └── 04Compute Target kcal2,000
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§01What is

Understanding the TDEE for Weight Loss

The TDEE for Weight Loss computes Target kcal from 2 inputs: tdee (kcal), deficit (%). 500 kcal deficit ~ 1 lb/week.

Health metrics give us objective checkpoints against a body that can feel unreliable. Used alongside professional guidance — not in place of it — these numbers help you track progress and spot trends that matter. The TDEE for Weight Loss sits in that toolkit — it 500 kcal deficit ~ 1 lb/week. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

e.tdee × (1-e.pct / 100)

Where

tdee
TDEE (kcal)
pct
Deficit (%)
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: TDEE (kcal) = 2500, Deficit (%) = 20.

  1. 01Start by noting the input — TDEE (kcal): 2500.
  2. 02Start by noting the input — Deficit (%): 20.
  3. 03Substitute these values into the formula: e.tdee × (1-e.pct / 100)
  4. 04Compute Target kcal: the calculator returns 2000.
  5. 05Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants

Common TDEE for Weight Loss Problems

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.

01 · PATTERN

TDEE (kcal) halved

tdee = 1250 (from 2500)

Keep every other input at its default and halve the tdee (kcal). See how target kcal responds.

  1. 01New TDEE (kcal): 1250
  2. 02Baseline Target kcal: 2000
  3. 03New Target kcal: 1000
  4. 04Target kcal decreases by 50% → use this sensitivity to plan for real-world variation.
02 · PATTERN

TDEE (kcal) doubled

tdee = 5000 (from 2500)

Keep every other input at its default and double the tdee (kcal). See how target kcal responds.

  1. 01New TDEE (kcal): 5000
  2. 02Baseline Target kcal: 2000
  3. 03New Target kcal: 4000
  4. 04Target kcal increases by 100% → use this sensitivity to plan for real-world variation.
03 · PATTERN

Deficit (%) halved

pct = 10 (from 20)

Keep every other input at its default and halve the deficit (%). See how target kcal responds.

  1. 01New Deficit (%): 10
  2. 02Baseline Target kcal: 2000
  3. 03New Target kcal: 2250
  4. 04Target kcal increases by 12.5% → use this sensitivity to plan for real-world variation.
04 · PATTERN

Deficit (%) doubled

pct = 40 (from 20)

Keep every other input at its default and double the deficit (%). See how target kcal responds.

  1. 01New Deficit (%): 40
  2. 02Baseline Target kcal: 2000
  3. 03New Target kcal: 1500
  4. 04Target kcal decreases by 25% → use this sensitivity to plan for real-world variation.
§05FAQ

Frequently asked questions

Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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