Fitness

Solve for pace, finish time or distance from any two, and compare 5K to marathon times a…

Calculate calories burned running from distance, time or pace and incline, and compare 5…

Solve for pace, cadence or step length from the other two, then see +5–10% target cadenc…

Turns 5K, 10K, half marathon and marathon times into an age grade (%) and shows same-gra…

Build a race plan from your goal time: pace split, checkpoint times, watch error and a w…

Predict your half marathon time and range from recent times, see the 5K and 10K times yo…

An interval timer that beeps when you switch between running and walking, and shows what…

Calories burned walking from steps, time or distance, with speed, grade and stairs.

Calculates calories burned swimming from weight, time and stroke using 2024 Compendium M…

Estimates calories burned from time, distance, speed, hills and bike type using power, w…

Calculate calories burned jumping rope from weight, jumps, time and pace, and see how ma…

A pitch-shaped calculator that turns your weight and the halves or blocks you actually p…

Steps × step length gives distance in km or miles. Also finds the steps needed for a dis…

Estimates walking stride from height and pace and running stride from pace, then checks …

Work out lifetime miles walked, laps around the Earth and the age you passed each milest…

Get speed, time or distance from the other two, plus required power for your weight, pos…

Estimate your 1RM from weight and reps, compare 7 formulas, and get a training load char…

Calculates max heart rate and Zone 1–5 ranges from your age and resting heart rate, and …

Estimate VO2 max from a 12-minute run, a mile walk or heart rate, then see your rank for…

Compare total cost, cost per workout and the month home equipment pays for itself agains…