Health & Fitness Calculators: BMI, Calories & TDEE

Tracking your health starts with understanding your numbers. This guide covers the best free calculators on Taskly's health & fitness page.

BMI Calculator

The BMI calculator estimates body mass index from height and weight, while the BMI percentile calculator compares you to age-based percentiles.

Calories & TDEE

The calorie calculator estimates daily needs, and the TDEE calculator factors in activity level for accurate maintenance calories.

Body Composition

The body fat calculator estimates fat percentage from measurements, and the calorie burn calculator estimates calories burned by activity.

Hydration & Sleep

Stay hydrated with the water intake calculator and plan better rest with the sleep calculator.

Get Started

All tools are private — calculations run in your browser. Browse at health & fitness calculators.

Frequently Asked Questions

What is the difference between BMI and body fat?

BMI estimates body mass from height and weight, while the body fat calculator estimates your fat percentage using measurements like waist, neck and hip — the latter is a better fitness indicator.

How do I calculate how many calories I should eat?

The calorie and TDEE calculators use your age, gender, height, weight and activity level to estimate your daily maintenance calories and targets for losing, gaining or maintaining weight.

Are these health tools private?

Yes. Calculations run entirely in your browser and no health data is uploaded or stored on our servers.