Tiny Toolkit

Calorie Calculator — Daily Calorie Needs by Goal

Enter your age, height, weight, sex, and activity level to estimate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. The tool also shows calorie targets for mild and moderate weight loss or gain. Use these numbers as a starting point — individual needs vary.

All processing happens in your browser. No data is sent to any server.

Frequently Asked Questions

What formula is used to calculate calorie needs?
The Mifflin-St Jeor equation calculates your Basal Metabolic Rate (BMR), which is then multiplied by an activity factor to give your Total Daily Energy Expenditure (TDEE).
What is TDEE?
TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns in a day including all activity. Eating at TDEE maintains your current weight.
How many calories should I cut to lose weight?
A 500 kcal/day deficit generally leads to approximately 1 lb (0.45 kg) of weight loss per week. A 250 kcal deficit leads to about 0.5 lb/week. Always consult a healthcare professional before making significant dietary changes.

Related Tools

Percentage Calculator — 3 Ways to Calculate Percentages

Calculate what percent of a number is, find a percentage change between two values, or determine what percent one number is of another. Three calculators in one. Free.

Ratio Calculator — Simplify Ratios & Solve Proportions

Simplify any ratio to its lowest terms, solve proportions, or find the missing value in A:B = C:X. Enter any three values to solve for the fourth. Free.

Age Calculator — Exact Age in Years, Months & Days

Calculate your exact age in years, months, and days from any date of birth. Also shows your next birthday and how many days until it. Free, instant results.

Related Articles

What Is BMI and Is It a Good Measure of Health?

BMI is a simple ratio of weight to height used to screen for weight-related health risks. Here's how it's calculated, what the ranges mean, and where it falls short as a health metric.

4 min read