Workout Performance, Pace & Calorie Calculators

Calculate running splits, one-rep maximums, target heart rate zones, and daily protein targets to reach your fitness goals faster.

9 free calculators100% Free no signup requiredPrivate runs in your browser

Popular topics:Running PaceOne-Rep Max (1RM)Heart Rate ZonesProtein Intake

Showing 9 Fitness calculators

Training heart rate zones using the Karvonen method.

Pace per kilometer and speed from distance and time.

Estimate your maximum single lift from a multi-rep set.

Calories burned by common activities.

Daily protein target for your activity level.

Convert steps to kilometers, miles, time, and calories.

Predict 5K, 10K, half marathon, and marathon times from one result.

Estimate aerobic fitness from a 12 minute run.

Estimate body fat percentage from tape measurements.