Fitness Calculators

Free online fitness calculators tools. Convert and calculate fitness calculators values instantly in your browser.

Calculate calories burned during exercise based on activity type, duration, and body weight.

Calculate your target heart rate training zones based on age. Find zones for fat burn, cardio, and peak performance.

Calculate your running pace per mile or kilometer. Enter distance and time to find your pace and speed.

Calculate body surface area (BSA) in square meters using the Mosteller formula. Supports imperial and metric units.

Advanced running pace calculator. Solve for pace, finish time, or distance. Calculate splits for km or miles.