Sports Calculators

Running pace, marathon training, cycling speed, swimming pace, and heart rate zone calculators.

6 calculators in this category

Calculate your running pace per mile or per kilometer from total time and distance. Or work backward — find finish time given a target pace.

Find your required marathon pace per mile and per kilometer to hit a target finish time. Includes split markers at 5K, 10K, half, and 30K.

Calculate average cycling speed and finish time from distance and ride time. Or find finish time given target average speed.

Calculate your maximum heart rate and the five training zones (Zone 1-5) using the Tanaka formula and percent-of-max method.

Calculate swim pace per 100m or per 100 yards from total time and distance. Convert between yards and meters automatically.

Predict your race time at a different distance from a recent result. Uses the Riegel formula, the standard predictor for endurance running.