Running Pace Calculator — Pace, Speed & Race Predictions

Enter a race distance and your goal time — get exact min/km and min/mile splits plus speed, instantly.

Quick answer: Free running pace calculator: distance and finish time gives pace per km/mile, speed, and 10K/half predictions — instant.

Distance Finish time (minutes) Seconds

How to use

Enter distance and unit.
Enter your finish time.
Read pace, speed and predictions live.

General information only — not medical, financial or legal advice. Figures cross-checked against public official sources (IRS / HMRC / NHS / WHO guidance); content last reviewed September 2026. For decisions that matter, confirm with a licensed professional in your country.

About this tool

Training plans speak pace, treadmills speak speed, watches speak both. This calculator converts your goal into the numbers your run needs — plus honest Riegel-formula predictions for other race distances.

FAQ

What pace for a 25-minute 5K?

5:00 min/km (8:03 min/mile) — enter it and see.

How accurate are predictions?

Riegel formula is good when training matches the distance — a target, not a promise.

Treadmill speed?

The speed readout converts directly.

Walking?

Identical math — pace is pace.

GPS drift?

Pace from known distances (race/track) beats GPS jitter — compute after the race.

Mobile?

Yes — big touch inputs, works offline.

Rate this tool

Your rating stays in this browser (local storage) — nothing is sent to any server.

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The complete pace calculator guide

Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Pace Calculator — Complete Guide, Mistakes & FAQ covers all of it step by step.

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Running Pace Calculator — Pace, Speed & Race Predictions

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About this tool

FAQ

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The complete pace calculator guide