Quick answer
Pace is time divided by distance. Enter a distance and a time and the calculator returns your pace per kilometre and per mile and your speed in km/h and mph: 10 km in 50 minutes is 5:00 per km, 8:03 per mile and 12 km/h.
Pace and speed are two views of the same thing: pace in minutes per kilometre equals 60 divided by speed in km/h. To plan training paces from a race result, use the running training pace calculator.
Related tools: Pace Distance Calculator: Distance covered at a steady pace for a given time.
How to use the Pace Calculator
- Enter distance (above 0).
- Choose distance unit: Kilometers, Miles and Meters.
- Optionally, enter hours (0 or more).
- Optionally, enter minutes (0 or more).
- Optionally, enter seconds (0 or more).
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Distance | A number | > 0 |
| Distance unit | Choose one: Kilometers; Miles; Meters | Starts at Kilometers |
| Hours (optional) | A number | ≥ 0 |
| Minutes (optional) | A number | ≥ 0 |
| Seconds (optional) | A number | ≥ 0 |
Formula and method
Formula
pace = time ÷ distance; speed = distance ÷ time
IEEE-754 double precision; shown to the decimals indicated.
Pace is shown per kilometer and per mile; speed in km/h and mph. Informational estimate, not medical advice. Talk to a qualified health professional about your own situation.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Distance = 10; Distance unit = Kilometers; Hours = 0; Minutes = 50; Seconds = 0.
| Result | Value |
|---|---|
| Pace per km | 5:00 |
| Pace per mile | 8:03 |
| Speed (km/h) | 12 |
| Speed (mph) | 7.46 |
Example 2
Inputs: Distance = 5; Distance unit = Miles; Hours = 0; Minutes = 40; Seconds = 0.
| Result | Value |
|---|---|
| Pace per mile | 8:00 |
| Pace per km | 4:58 |
| Speed (km/h) | 12.07 |
| Speed (mph) | 7.5 |
Example 3
Inputs: Distance = 42.195; Distance unit = Kilometers; Hours = 3; Minutes = 30; Seconds = 15.
| Result | Value |
|---|---|
| Pace per km | 4:59 |
| Pace per mile | 8:01 |
| Speed (km/h) | 12.04 |
| Speed (mph) | 7.48 |
The first line is the headline result (pace per km). Below it the pace Calculator lists pace per mile, speed (km/h) and speed (mph), which describe the same case from other angles. IEEE-754 double precision; shown to the decimals indicated.
Converting between kilometres and miles
One mile is 1.609344 kilometres, so a pace in minutes per mile is the pace per kilometre multiplied by 1.609344. At 5:00 per km, that is 5 × 1.609344 = 8.047 minutes, or 8:03 per mile. Going the other way, divide by 1.609344.
Splits and target times
To plan a race, multiply your target pace by the distance: at 5:00 per km, 5 km takes 25:00, 10 km takes 50:00 and 21.0975 km (a half marathon) takes about 1:45:29. Even splits mean running every kilometre at the same pace; this calculator reports the average pace for a finished or planned effort rather than a split table, and for training paces from a race result see the running training pace calculator.
Common mistakes
- Entering minutes and seconds in the wrong boxes: 50 minutes is not 50 seconds.
- Reading 8.5 minutes as 8:50; it is 8:30.
- Comparing a per-mile pace with a per-kilometre pace.
A 10 km run at different finishing times
Every figure in this table comes from running this calculator, so it matches what the form returns.
| Minutes | Pace per km | Pace per mile | Speed (km/h) |
|---|---|---|---|
| 45 | 4:30 | 7:15 | 13.33 |
| 50 | 5:00 | 8:03 | 12 |
| 55 | 5:30 | 8:51 | 10.91 |
| 60 | 6:00 | 9:39 | 10 |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Distance: entering "0" shows "Distance must be greater than 0." beside that field and no result.
- Minutes: entering "0" shows "Enter a time greater than zero." beside that field and no result.
Choosing between the Pace Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Pace Distance Calculator](/fitness/pace-distance-calculator/) | pace minutes and pace per | Distance |
| [Marathon Pace Calculator](/fitness/marathon-pace-calculator/) | race | Pace per km |
| [Running Training Pace Calculator](/fitness/training-pace-calculator/) | race distance, hours and minutes | VDOT (estimated VO₂max) |
| [Swimming Pace Calculator](/fitness/swimming-pace-calculator/) | distance and unit | Pace per 100 m |
| [Calories per Mile Calculator](/fitness/calories-per-mile-calculator/) | body weight and pace | Calories per mile |
Background: fitness estimates
Fitness formulas are estimates whose accuracy depends on the input. One-rep-max formulas such as Epley and Brzycki give different answers, and predictions from hard sets of a few repetitions are better than from sets of ten or more. Age-based maximum heart rate formulas can be off by 10 to 30 beats a minute for an individual; Tanaka's 208 − 0.7 × age is generally preferred to 220 − age but is still an estimate.
Pace models built from a race result assume a maximal effort and work best for distances from about 5 km to the marathon. Use the output as a guide, not a prescription.
Assumptions and limitations
- Time can be entered in any combination of hours, minutes and seconds
- Not a diagnosis
Estimates from formulas describe averages. They are not a training or medical prescription; check with a qualified professional before changing your exercise or diet.
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for distance and minutes to confirm this.
Frequently asked questions
What is a good running pace?
There is no single standard: published guidance for beginners differs, and the right pace depends on fitness, terrain and goals. Use the calculator to measure your own pace and compare it over time.
What does the Pace Calculator calculate?
Pace and speed from a distance and a time. It returns Pace per km, Pace per mile, Speed (km/h) and Speed (mph).
What formula does the Pace Calculator use?
pace = time ÷ distance; speed = distance ÷ time. Pace is shown per kilometer and per mile; speed in km/h and mph.
What do I need to enter in the pace Calculator?
You enter Distance and Distance unit. Optional: Hours, Minutes and Seconds.
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Time can be entered in any combination of hours, minutes and seconds.
What are the limits of this calculator?
Time can be entered in any combination of hours, minutes and seconds. Not a diagnosis.
What does the “Distance unit” option change?
It sets how the pace is worked out. The choices are Kilometers, Miles and Meters.
What is an example of a pace result?
With distance 10, distance unit Kilometers, hours 0, minutes 50 and seconds 0, the pace per km is 5:00.
Where does the method come from?
The method follows: International mile: 1,609.344 m exactly (1959 International Yard and Pound Agreement).
Can I rely on this calculator for a decision?
Estimates from formulas describe averages. They are not a training or medical prescription; check with a qualified professional before changing your exercise or diet. For this calculator in particular: Time can be entered in any combination of hours, minutes and seconds.
Related calculators
- Pace Distance Calculator — Distance covered at a steady pace for a given time.
- Swimming Pace Calculator — Pace per 100 meters or yards from a distance and a time.
Sources
- International mile: 1,609.344 m exactly (1959 International Yard and Pound Agreement)
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.