Health & Fitness
TDEE Calculator
TDEE — TDEE Calculator multiplies your Mifflin-St Jeor BMR by an activity factor for total daily energy expenditure. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Enter your body weight, standing height, age and sex and TDEE Calculator works out your total daily energy expenditure in kcal/day with your Mifflin–St Jeor BMR multiplied by your activity factor — fast, free and private, with no sign-up or uploads.
About this calculator
Get tdee right and the rest of the task gets easier. TDEE Calculator multiplies your Mifflin-St Jeor BMR by an activity factor for total daily energy expenditure. It matters when you want a quick screening number before deciding whether a habit, plan or measurement deserves a closer look. With a BMR of 1,600 kcal and a 'lightly active' factor of 1.375: TDEE ≈ 1,600 × 1.375 = 2,200 kcal/day . The tool above does the same computation in your browser — free, private, nothing stored.
How to use
- Enter your weight, height, and age for the base equation.
- Select your sex for the correct base equation.
- Choose the activity level matching your routine.
- Press Calculate to see your estimated TDEE.
Why use TDEE Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Educational
Uses common estimation formulas for educational purposes. Results are not medical advice and should not replace professional guidance.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Clear about formulas used and their limits, with disclaimers where they matter.
Common uses
Use it when learning what a metric means
Use it for everyday fitness check-ins
Use it for setting realistic training goals
Use it when adjusting diet and exercise
TDEE in personal-training sessions
TDEE as a general wellness guide
Technical notes
TDEE Calculator multiplies your Mifflin-St Jeor BMR by an activity factor for total daily energy expenditure.
These are general-population estimates and not a substitute for advice from a qualified clinician.
Because it runs locally, results appear instantly with no server round-trip.
FAQ
How is TDEE estimated?
We calculate BMR with the Mifflin–St Jeor equation, then multiply by an activity factor between 1.2 (sedentary) and 1.9 (very active) to approximate total daily burn.
Which activity level should I pick?
Choose the option that reflects your whole week including work. Most people with desk jobs and a few workouts fall between light and moderate.
How do I use TDEE for weight goals?
Eat near TDEE to maintain, below it to lose, and above it to gain. A deficit or surplus of about 500 kcal/day shifts weight gradually.
Does the TDEE Calculator send my data to a server?
No. The TDEE Calculator runs entirely in your browser — your inputs never leave your device, and nothing is uploaded or stored.
Worked example
With a BMR of 1,600 kcal and a 'lightly active' factor of 1.375: TDEE ≈ 1,600 × 1.375 = 2,200 kcal/day. Estimate only.