Health Tools

Health & Fitness Calculators

Estimate maintenance calories, set a realistic deficit, and track progress with clear numbers.

BMI Calculator

Calculate BMI (body mass index) and category from height and weight.

BMR Calculator

Estimate basal metabolic rate (resting calories) using Mifflin-St Jeor.

TDEE Calculator

Calculate maintenance, cut, and bulk calories fast.

Body Fat Calculator

Estimate body fat percentage using measurements.

Calorie Deficit Calculator

Calculate daily calories for a deficit based on TDEE.

Ideal Body Weight Calculator

Estimate ideal weight range based on height.

One Rep Max Calculator

Estimate 1RM from weight and reps using common formulas.

Period Calculator

Estimate next period, ovulation, and fertile window from cycle length.

Browse all tools on the ClearCalculate homepage or explore the full calculator directory.

How to use these health calculators

Most health and fitness planning is easier when you start with energy balance. Get a reasonable estimate of maintenance calories, then choose a goal (lose fat, maintain, gain muscle) and make small adjustments based on weekly trends.

Recommended order:

Estimate maintenance with the TDEE Calculator.
Convert maintenance into a target using the Calorie Deficit Calculator.
Track body composition context with the Body Fat Calculatorand use the Ideal Body Weight Calculatoras a simple height-based reference.

The core idea: maintenance + adjustment

Maintenance calories are the level where your weight tends to stay stable over time. A cut or bulk is simply an adjustment above or below that baseline.

Target calories = TDEE ± adjustment

Example: if TDEE is 2,400 and you cut 400 calories, target = 2,000 kcal/day

The “right” adjustment is the one you can stick to while sleeping well, training effectively, and maintaining reasonable hunger levels.

Common mistakes (and how to avoid them)

Choosing an activity level that overestimates your average movement.
Going too aggressive on deficit and burning out after 1–2 weeks.
Judging progress by day-to-day scale weight rather than weekly averages.
Expecting perfect precision: calculators are estimates—use them to iterate.

Which calculator should you use?

Goal	Best tool	What to focus on
Find maintenance calories	TDEE Calculator	Maintenance target + goal calories
Pick a cut target	Calorie Deficit	Daily target and implied weekly change
Estimate body fat	Body Fat	Trend over time with consistent measuring
Reference a height-based weight estimate	Ideal Body Weight	Context for planning, not a strict target

Why Trust Our Health Tools

Science-Based

Our calculators use proven scientific formulas and methods trusted by health professionals.

Personalized Results

Get calculations tailored to your specific body metrics, activity level, and goals.

Goal Oriented

Whether you're cutting, bulking, or maintaining, get the exact numbers you need.

Related Categories

Education Calculators

Student planning tools for grades, GPA, and academic goals.

Finance Calculators

Budget, salary, and tax-focused calculators for real decisions.

Frequently Asked Questions

TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns in a day. It's crucial for weight management, muscle building, and achieving your fitness goals.