Pace Calculator
Enter your race time and distance to calculate pace per kilometre or mile, speed in km/h or mph, and your full breakdown.
Quick race presets
Your race time
Track every run with a GPS watch
A GPS watch is the most useful tool for monitoring your pace in training and on race day. These are well-regarded picks at different price points.
Garmin Forerunner 265
AMOLED display, live pace alerts, and advanced training analytics. The best mid-range option for runners serious about their times.
View on AmazonGarmin Forerunner 255
Accurate GPS, up to 14 days battery life, and a clean interface. A reliable first serious running watch.
View on AmazonNike Pegasus
Versatile daily trainer for tempo runs, long runs and easy miles — one of the most popular running shoes year after year.
View on AmazonHalf marathon training plans
Half marathon plans for every level, with pacing tables and race-week preparation built in.
Beginners Half Marathon Finisher Plan
£5.99
Intermediate Half Marathon Running Plan
£5.99
Breaking the Barrier: 1:45 Half Marathon Plan
£5.99
How it works
Enter your total time and distance. The calculator divides total time by distance to give you pace per unit, and converts the result to speed in km/h and mph. Switch between kilometres and miles using the unit buttons.
Frequently asked questions
What is running pace?
Pace is how long it takes you to cover a set distance — usually expressed as minutes per kilometre or minutes per mile. A pace of 5:00/km means you take 5 minutes to run 1 kilometre.
How do I convert pace from km to miles?
Multiply your min/km pace by 1.60934. So a 5:00/km pace equals roughly 8:03/mile. This calculator does the conversion automatically.
What pace do I need to run a sub-4 hour marathon?
You need to average 5:41 per kilometre (9:09 per mile) to finish a marathon in under 4 hours.
Is pace the same as speed?
They are inverses of each other. Pace measures time per distance (min/km), speed measures distance per time (km/h). Lower pace = faster running.