Free calculators, right now
Every page targets a specific distance and finish time — sub-3:05 marathon, sub-20 5K, and hundreds more. Open any calculator instantly, no signup required.
About PaceSplits
PaceSplits is a free running pace calculator built for runners who plan races by the clock. Pick your distance, pick your goal, and get the numbers you need to train and execute — then join the app waitlist for personalized plans built around your pace.
Mile-by-mile clarity
See the exact even pace per mile and cumulative splits at every marker. Toggle negative splits on any calculator to plan a smarter race-day strategy.
The PaceSplits app is coming
The free site gets you the numbers. The PaceSplits app will turn your goal pace into a full training plan — workouts, weekly mileage, and race-day guidance tailored to your target time.