18 free calculators to help you train smarter and race faster
Calculate your running pace per mile or kilometer. Enter your distance and time to get your pace breakdown.
Open Tool ›Estimate your finish time for any race distance based on a recent race result. Uses the Riegel formula.
Open Tool ›Convert your finish time between race distances. Predict your marathon time from a half marathon, or your 10K from a 5K.
Open Tool ›Calculate even, negative, or positive splits for any race distance. Get mile-by-mile target times.
Open Tool ›Estimate your race finish time from your current pace and total distance.
Open Tool ›Find your 5 training pace zones based on a recent race time. Recovery, easy, tempo, threshold, and interval.
Open Tool ›Calculate your 5K pace from finish time or target pace. Get mile splits and speed for 3.1 miles.
Open Tool ›Calculate your 10K pace from finish time or target pace. Get mile splits and speed for 6.2 miles.
Open Tool ›Calculate your half marathon pace. Get mile-by-mile splits and projected finish time for 13.1 miles.
Open Tool ›Calculate your marathon pace with halfway split, 20-mile mark, and all 26.2 mile splits.
Open Tool ›Estimate how many calories you burn during a run based on your weight, distance, and pace.
Open Tool ›Set a race goal time and get target split paces with mile-by-mile cumulative splits.
Open Tool ›Build a gradual mileage plan following the 10% rule with built-in recovery weeks.
Open Tool ›Calculate run-walk intervals and estimate your total finish time for any distance.
Open Tool ›Find your ideal running cadence based on your pace and stride length or height.
Open Tool ›Calculate your Body Mass Index from height and weight. See your category and healthy weight range.
Open Tool ›Estimate fluid needs based on run duration, temperature, and intensity. Get a personalized drink schedule.
Open Tool ›Track your shoe mileage and know when it is time for a new pair. Visual wear indicator included.
Open Tool ›Estimate your 5K finish time based on pace per mile. Quick reference for your next 3.1-mile race.
View Chart ›Plan your 10K race goal with a simple pace chart. Find your finish time for 6.2 miles.
View Chart ›See projected half marathon finish times at different paces. Plan your 13.1-mile race.
View Chart ›Find your estimated marathon finish time from your average pace per mile.
View Chart ›