Running, Walking & Endurance
Pace-to-speed conversion, race time predictions (Riegel formula), split calculations, marathon pace charts, and distance time.
Pace Calculator
Calculate running or walking pace per kilometer and per mile from time and distance
Running Pace Calculator
Dedicated running pace, speed, and standard race splits analysis
Walking Pace Calculator
Calculate walking pace, brisk walking speed, and daily step pacing
Running Speed Calculator
Calculate speed in kilometers per hour (km/h) and miles per hour (mph)
Pace-to-Speed Calculator
Convert running pace (min/km or min/mile) directly to speed (km/h and mph)
Speed-to-Pace Calculator
Convert treadmill speed in km/h or mph to running pace (min/km and min/mile)
Race Time Calculator
Calculate finish times across 5K, 10K, Half Marathon, and Marathon from target pace
Running Time Calculator
Calculate elapsed time from distance and running speed or pace
5K Pace Calculator
Calculate target pace and split benchmarks for 5 kilometer road races
10K Pace Calculator
Calculate kilometer splits and pacing strategies for 10 kilometer races
Half Marathon Pace Calculator
Calculate target pace and 5K interval splits for 21.0975 km half marathons
Marathon Pace Calculator
Calculate official marathon pace and 5K split checkpoints for 42.195 km
Running Calories Calculator
Calculate exact calories burned running based on body mass and distance
Walking Calories Calculator
Calculate calories burned walking based on weight and distance
Distance Calculator
Calculate distance covered from running duration and speed or pace
Time-Distance-Pace Calculator
Triangular athletic calculator solving for either Time, Distance, or Pace
Split Calculator
Calculate intermediate kilometer and mile split times for any target race
Race Predictor
Predict finish times across any distance using your recent race performance
Riegel Race Predictor
Dedicated implementation of Peter Riegel's 1.06 fatigue exponent equation
Running Cadence Calculator
Calculate steps per minute (SPM), stride frequency, and ground contact time dynamics
Stride Length Calculator
Calculate running or walking stride length from height, speed, or steps
Average Pace Calculator
Calculate composite average pace across multiple splits, intervals, or laps
Elevation Pace Calculator
Calculate Grade-Adjusted Pace (GAP) accounting for uphill and downhill slope
5K Time Predictor
Predict your 5K race finish time from recent 1-mile, 10K, or half marathon performances
10K Time Predictor
Predict your 10,000m race finish time from 5K, half marathon, or marathon times
Half Marathon Time Predictor
Predict your 21.1 km half marathon finish time from 5K or 10K race results
Marathon Time Predictor
Predict your 42.195 km marathon finish time from half marathon or 10K times