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Use this Running Pace Calculator to calculate your pace, projected finish time and race splits for common running distances. Enter your time, distance or pace, and the calculator helps you work out how fast you need to run or what finish time your current pace would produce.

You can use it for 5K, 10K, half marathon, marathon and custom distances. The calculator supports both kilometres and miles, making it useful whether you train in min/km or min/mile.

Calculate your running pace, finish time or distance

Running pace is the amount of time it takes to run one kilometre or one mile. For example, a pace of 5:00 min/km means you run each kilometre in five minutes.

This calculator helps you answer common running questions such as:

What pace do I need for a 45-minute 10K?

What finish time will I get if I run 5:30 min/km?

What pace do I need to run a sub-2 hour half marathon?

What marathon time does my current running pace suggest?

How fast should I run per mile instead of per kilometre?

The tool is designed for quick race planning, training checks and pace conversion.

How to use the running pace calculator

Enter the details you know, such as your distance and finish time, or your current pace and target distance. The calculator will then work out the missing result.

You can use it to calculate:

Running pace

Estimated finish time

Race distance

Pace per kilometre

Pace per mile

Projected race times

Custom distance results

This makes it useful for both training and race preparation. You can check your current fitness, compare race goals or work out the pace needed for a specific finish time.

Running pace for 5K, 10K, half marathon and marathon

The calculator can be used for the most popular road-running distances:

5K

10K

Half marathon

Marathon

Custom distance

A small difference in pace can have a big impact over longer distances. Running 10 seconds faster per kilometre may not feel like much during a short run, but across a half marathon or marathon it can change your finish time by several minutes.

That is why a running pace calculator is useful. It shows the real impact of pace changes across different race distances.

Min/km and min/mile pace calculator

Runners often use different pace formats depending on where they live, which watch they use or which training plan they follow.

This calculator works with both:

Minutes per kilometre

Minutes per mile

If your training plan is in miles but your race is listed in kilometres, or the other way around, the calculator helps you compare both formats quickly.

Race pace calculator

This tool also works as a race pace calculator. You can use it to estimate the pace needed for a target race time or to see what finish time your current pace would produce.

For example, you can calculate the pace needed for:

A sub-25 minute 5K

A sub-50 minute 10K

A sub-2 hour half marathon

A sub-4 hour marathon

A custom race goal

This is especially useful when setting realistic race targets. Instead of guessing, you can see the exact pace required and decide whether that target fits your current training level.

Custom distance running pace calculator

Not every run or race fits a standard distance. Some events are 5 miles, 10 miles, 15K, 20K or trail routes with unusual distances.

The custom distance option lets you enter your own distance and calculate the pace or finish time for that specific run. This is useful for training routes, local races, charity runs, relay legs and non-standard events.

Pace calculator vs finish time calculator

A pace calculator works out how fast you need to run per kilometre or per mile.

A finish time calculator estimates how long it will take to complete a distance at a given pace.

This tool can help with both. You can use it to calculate your pace from a known finish time, or calculate your finish time from a known pace.

Is this a race predictor?

This calculator uses simple pace maths. It does not predict performance based on fitness, elevation, weather, fatigue, fuelling or race conditions.

Use it as a planning tool, not a guarantee.

Your actual race result will depend on how well you can hold the pace over the full distance. A pace that feels comfortable for 5K may not be realistic for a half marathon or marathon without the right training.

Running Pace Calculator FAQ

What is a running pace calculator?

A running pace calculator helps you calculate your pace, finish time or distance. You can use it to work out how fast you need to run for a target time or estimate your finish time based on your current pace.

How do I calculate running pace?

Running pace is calculated by dividing your total time by your distance. For example, if you run 10 kilometres in 50 minutes, your pace is 5:00 min/km.

Can I calculate pace per kilometre and pace per mile?

Yes. This calculator supports both min/km and min/mile, so you can calculate running pace in kilometres or miles.

What pace do I need for a 5K?

Enter 5K as your distance and add your target finish time. The calculator will show the pace you need to run per kilometre or per mile.

What pace do I need for a 10K?

Enter 10K as your distance and your target time. The calculator will show the required average pace for the full race.

What pace do I need for a half marathon?

A half marathon is 21.0975 kilometres, or about 13.1 miles. Enter your target half marathon time to calculate the pace needed.

What pace do I need for a marathon?

A marathon is 42.195 kilometres, or about 26.2 miles. Enter your target marathon time to calculate the required average pace.

Can I use this calculator for custom distances?

Yes. You can enter a custom distance to calculate pace or finish time for non-standard races, training routes and local events.

Is running pace the same as speed?

No. Pace measures how long it takes to cover one kilometre or mile. Speed measures distance covered per hour. Runners usually use pace because it is easier to apply during training and racing.

Is this calculator accurate?

The maths is accurate, but race performance depends on more than pace. Weather, elevation, fatigue, training, fuelling and pacing strategy can all affect your final result.