How do I convert min/km to min/mile?

Multiply your min/km pace by 1.609. A 5:00 min/km pace is about 8:03 per mile.

What pace do I need for a sub-4-hour marathon?

About 5:41 per kilometre (9:09 per mile) held for the full 42.195 km.

Should I include walking breaks?

Yes, if you want average pace for the whole session. Enter total elapsed time rather than moving time.

Running Pace Calculator

Enter any two of distance, time and pace and this calculator works out the third, so you can plan a race target or check what a training run actually averaged.

Fill in the fields above and select Calculate to see your result and the full working.

Please note: Health calculators on this site provide general estimates based on population-level formulas. They are not medical advice and cannot account for your individual medical history. Speak to a qualified healthcare professional before making decisions about diet, medication or training.

Formula used

Pace = total time ÷ distance; time = pace × distance; distance = time ÷ pace

How to use this calculator

Choose whether you want pace, finish time or distance.
Fill in the two values you know — leave the others at zero.
Times are entered as hours, minutes and seconds; pace as minutes and seconds per kilometre or mile.

Example calculation

A 10 km run in 50 minutes:

50 minutes = 3,000 seconds

3,000 ÷ 10 = 300 seconds per kilometre

That is a 5:00 min/km pace, or 12 km/h.

What does this result mean?

Pace is the inverse of speed and is the unit runners actually think in. A useful planning rule: race pace for a distance you have not trained for is rarely faster than your comfortable long-run pace minus about 45 seconds per kilometre. Use this tool to convert a goal time into the pace you need to hold, then check whether that pace is realistic in training.

Frequently asked questions

How do I convert min/km to min/mile?: Multiply your min/km pace by 1.609. A 5:00 min/km pace is about 8:03 per mile.
What pace do I need for a sub-4-hour marathon?: About 5:41 per kilometre (9:09 per mile) held for the full 42.195 km.
Should I include walking breaks?: Yes, if you want average pace for the whole session. Enter total elapsed time rather than moving time.

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