Zoven

Calorie Calculator

Calculate daily calorie needs, TDEE, and BMR for diet

What is the Calorie Calculator?

The calorie works like this: it estimates daily calorie needs using the Mifflin-St Jeor BMR equation multiplied by an activity factor, then adds or subtracts for weight goals. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.

How to use the Calorie Calculator

1. Enter the values the calculator asks for.
2. Double-check the unit or period next to each field (per month vs per year, cm vs m).
3. Read the result together with the breakdown shown beneath it.
4. Adjust one input at a time to compare scenarios side by side.

Features

• Calculate daily calorie needs, TDEE, and BMR for diet
• Instant result, no page reload
• Works in any modern browser, desktop or mobile
• Free with no signup

Common mistakes to avoid

• Mixing units or periods between fields
• Rounding inputs before the final calculation
• Treating estimates as guarantees for major decisions

Examples

Input	Result
Female, 30y, 165cm, 62kg, moderate exercise, lose 0.5kg/week	Maintenance ~2,018 kcal · target ~1,518 kcal

Best used for

• Getting a reliable answer for calorie without installing an app
• One-off tasks done in under a minute from any device
• Checking results before committing them to something important
• Working on a phone where desktop software is unavailable

Privacy

Calculations run in your browser. Enter only what the calculation needs.

Frequently asked questions

How accurate is the estimate?

Within about 10% for most people. Track actual weight change over 2-3 weeks and adjust - your real number beats any formula.

Is eating below BMR dangerous?

Sustained large deficits below BMR can cause muscle loss and metabolic adaptation; moderate deficits are safer and more sustainable.

What is the difference between maintenance and target calories?

Maintenance is what your current weight needs at your activity level; the target adds or subtracts the daily deficit/surplus implied by your weekly weight-change goal (roughly 7,700 kcal per kilogram).

How accurate is the Mifflin-St Jeor estimate?

Within about 10% for most adults. Track real weight change over two to three weeks and adjust - your measured trend beats any formula, including this one.

More like this

Zoven offers 200+ free browser tools. Browse by category - Calculators, Converters, Generators, Developer Tools and Media Tools - or read workflow guides on the Zoven blog.