What is TDEE and how is it calculated?

TDEE (Total Daily Energy Expenditure) estimates the calories you burn per day. This tool computes your BMR with the Mifflin-St Jeor equation, then multiplies it by an activity factor from 1.2 (sedentary) to 1.9 (athlete-level training).

Is BMI accurate for athletes?

No — BMI only compares weight to height and cannot distinguish muscle from fat. Muscular people often score as overweight despite low body fat. Use the healthy weight range as context and treat the number as a rough screening metric, not a diagnosis.

Why does the calculator cap age at 15–100?

Mifflin-St Jeor was validated on adults, and BMI bands differ for children and teens (age- and sex-specific percentiles). For anyone under 18, a pediatrician should interpret growth charts instead.

Are the calorie targets safe?

The cut target is a moderate −20% deficit and the bulk target +10% surplus — sustainable rates for most healthy adults. They are estimates, not prescriptions; consult a professional for medical weight management.

BMI & TDEE Calculator

Body mass index, healthy weight range, BMR and daily calorie needs — computed locally

About you

Sex

Age (years)

Height (cm)

Weight (kg)

Units

Activity level

BMI

24.5

Normal weight

Healthy weight for 175 cm: 56.7–76.3 kg

Daily calories

BMR (Mifflin-St Jeor): 1699 kcal
TDEE (maintenance): 2633 kcal
Cut (−20%): 2106 kcal
Bulk (+10%): 2896 kcal

Macro breakdown (Mifflin-St Jeor)

Goal	Calories	Protein	Carbs	Fat
Cut	2106	158 g	211 g	70 g
Maintain	2633	197 g	263 g	88 g
Bulk	2896	217 g	290 g	97 g

Estimates use a 30/40/30 calorie split for protein, carbohydrates, and fat.

Export Results

{
  "bmi": 24.5,
  "band": {
    "id": "normal",
    "label": "Normal weight",
    "min": 18.5,
    "max": 25
  },
  "healthyWeightMin": 56.7,
  "healthyWeightMax": 76.3,
  "bmr": 1699,
  "tdee": 2633,
  "caloriesCut": 2106,
  "caloriesMaintain": 2633,
  "caloriesBulk": 2896
}

This calculator provides estimates for healthy adults and is not medical advice. Consult a healthcare professional before changing your diet or activity.

About this tool

Free BMI calculator with WHO classification, healthy weight range, BMR (Mifflin-St Jeor) and TDEE calorie targets. Metric or imperial, runs in your browser. BMI & TDEE Calculator runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.

What this tool does not do

BMI & TDEE Calculator is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.

How do I use this tool?

How do I use BMI & TDEE Calculator?
Open BMI & TDEE Calculator, enter or paste your input, and copy the result. The page works without an account.

BMI & TDEE Calculator

About you

Activity level

BMI

Daily calories

Macro breakdown (Mifflin-St Jeor)

About this tool

What this tool does not do

How do I use this tool?

How do I use BMI & TDEE Calculator?

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About you

Activity level

BMI

Daily calories

Macro breakdown (Mifflin-St Jeor)

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What this tool does not do

How do I use this tool?

How do I use BMI & TDEE Calculator?

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