Pace Calculator
Calculate running pace, time, or distance. Includes race predictions and training zones.
A pace calculator helps runners and cyclists convert between pace, time, and distance. Whether training for a 5K or planning a marathon, knowing your target pace helps you set realistic goals and maintain consistent effort throughout a race.
Examples
Calculate Pace for a 5K
Common Race Distances and Target Paces
| Race | Distance | Beginner Pace | Intermediate Pace | Advanced Pace |
|---|---|---|---|---|
| 5K | 3.1 miles | 12:00-14:00 min/mi | 9:00-11:00 min/mi | 6:00-8:00 min/mi |
| 10K | 6.2 miles | 12:30-15:00 min/mi | 9:30-11:30 min/mi | 6:30-8:30 min/mi |
| Half Marathon | 13.1 miles | 13:00-15:00 min/mi | 10:00-12:00 min/mi | 7:00-9:00 min/mi |
| Marathon | 26.2 miles | 13:00-16:00 min/mi | 10:00-12:30 min/mi | 7:00-9:30 min/mi |
Frequently Asked Questions
What is a good running pace?
Key Terms
- Pace
- The time it takes to cover a unit of distance, typically expressed as minutes per mile or minutes per kilometer.
- Negative Split
- Running the second half of a race faster than the first half, generally considered an optimal pacing strategy.
- Tempo Run
- A sustained run at a comfortably hard pace, typically 25-30 seconds per mile slower than 5K race pace.
- Splits
- The time for each segment of a race, such as each mile or kilometer.
References
- Running Pace Calculator — Runner's World
- Riegel Race Prediction Formula — RunSmart Project
Quick Tips
- •Start races slightly slower than your target pace — you can always speed up in the second half.
- •Train at different paces: easy runs build endurance, tempo runs build speed, intervals build power.
- •Use pace per mile or pace per km consistently to avoid confusion in race planning.
- •Factor in 5-10% slower pace for trail running compared to road running at equivalent effort.
A pace calculator helps runners and cyclists convert between pace, time, and distance. Whether training for a 5K or planning a marathon, knowing your target pace helps you set realistic goals and maintain consistent effort throughout a race.
How to Use This Calculator
Select what you want to find: Pace, Time, or Distance. Enter the two values you know (e.g. time and distance to get pace). Choose your units (e.g. min/mile, min/km, or speed in mph/km/h). Click Calculate. The calculator solves for the missing value, useful for planning runs or bike rides.
Understanding the Formula
Pace = Time / Distance. Speed = Distance / Time. Predictions use Riegel's formula: T2 = T1 * (D2/D1)^1.06.
Examples
Calculate Pace for a 5K
If you run 5K in 25 minutes, your pace is 5:00 per kilometer or 8:03 per mile.
Frequently Asked Questions
What is a good running pace?
Pace varies by experience. Beginners often start at 10-12 mins/mile, while competitive runners may maintain sub-7 mins/mile.
Assumptions & Limitations
- Race prediction uses Riegel's formula which assumes adequate training for the target distance.
- Does not account for elevation changes, weather conditions, or terrain differences.
- Pace assumes constant speed — real-world running involves natural pace variation.
- Heart rate zones and effort levels are not factored into pace calculations.
Common Race Distances and Target Paces
| Race | Distance | Beginner Pace | Intermediate Pace | Advanced Pace |
|---|---|---|---|---|
| 5K | 3.1 miles | 12:00-14:00 min/mi | 9:00-11:00 min/mi | 6:00-8:00 min/mi |
| 10K | 6.2 miles | 12:30-15:00 min/mi | 9:30-11:30 min/mi | 6:30-8:30 min/mi |
| Half Marathon | 13.1 miles | 13:00-15:00 min/mi | 10:00-12:00 min/mi | 7:00-9:00 min/mi |
| Marathon | 26.2 miles | 13:00-16:00 min/mi | 10:00-12:30 min/mi | 7:00-9:30 min/mi |
Key Terms
- Pace
- The time it takes to cover a unit of distance, typically expressed as minutes per mile or minutes per kilometer.
- Negative Split
- Running the second half of a race faster than the first half, generally considered an optimal pacing strategy.
- Tempo Run
- A sustained run at a comfortably hard pace, typically 25-30 seconds per mile slower than 5K race pace.
- Splits
- The time for each segment of a race, such as each mile or kilometer.
References
- Running Pace Calculator — Runner's World
- Riegel Race Prediction Formula — RunSmart Project