Running Pace Calculator
Calculate your running pace, finish time, or distance. Enter any two values and get the third instantly — plus see pace charts for popular race distances.
Calculate Your Pace
Enter any two fields and the third will be calculated automatically.
Popular Pace Charts
5K Pace Chart
Finish times from 15:00 to 45:00 with per-km and per-mile splits.
10K Pace Chart
Finish times from 30:00 to 1:30:00 with detailed split breakdowns.
Half Marathon Pace Chart
Finish times from 1:10 to 3:00 with mile and km pace targets.
Marathon Pace Chart
Finish times from 2:30 to 6:00 with complete split tables.
Frequently Asked Questions
Divide your total time by the distance. For example, if you ran 5K (3.1 miles) in 25 minutes, your pace is 25 ÷ 3.1 = 8:04 per mile, or 25 ÷ 5 = 5:00 per km. Use the calculator above to do this instantly for any distance.
Most beginners run between 10:00–13:00 per mile (6:15–8:05 per km). A comfortable pace where you can hold a conversation is ideal for building fitness. Don't worry about speed — consistency matters more than pace when you're starting out.
Pace is time per distance (e.g., 8:00 per mile), while speed is distance per time (e.g., 7.5 mph or 12 km/h). Runners typically use pace because it's easier to target during a run. This calculator shows both.
We use the Riegel formula: T₂ = T₁ × (D₂/D₁)^1.06, which is the most widely used race prediction model. It accounts for the fact that pace naturally slows as distance increases. The formula was published by Peter Riegel in 1977 and is used by Runner's World and most running apps.
The Riegel formula is most accurate for distances between 1 mile and the marathon for trained runners. Predictions become less reliable for ultra distances, sprints, or if you're significantly more trained for one distance than another. Use them as guideline targets, not guarantees.
Enter your goal race distance and time in the calculator to find the required pace. For example, a 4:00:00 marathon requires a 9:09/mile (5:41/km) pace, and a sub-2:00 half marathon needs 9:09/mile (5:41/km) or faster.
How to Use the Running Pace Calculator
The PacePercentile pace calculator helps runners plan training and race targets. Whether you're preparing for your first 5K or chasing a marathon PR, knowing your target pace is essential for pacing strategy.
Three Calculation Modes
- Find Pace — Enter your distance and time to calculate the pace you need to maintain.
- Find Time — Enter distance and pace to predict your finish time.
- Find Distance — Enter time and pace to see how far you'll cover.
Understanding Running Splits
Split times show your target time at each kilometer or mile marker. Even splits (same pace throughout) are generally the most efficient race strategy. The split table helps you set watch alerts or plan where you should be at each checkpoint.
Race Time Predictions
The equivalent race times use the Riegel formula to estimate how your fitness translates across distances. If you've recently run a 5K race, the predictor can estimate your half marathon or marathon potential at the same fitness level.