Running Pace Calculator
Pace is the runner's working unit: minutes and seconds per kilometer or mile. Enter a distance and a finish time — actual or target — and this calculator returns your pace both ways plus average speed. Use it to plan race splits or translate a goal time into the pace you must hold.
Fill in the fields above to see your result.
How it's calculated
The math is direct: pace equals total time divided by distance. Run 10 km in 52:30 and your pace is 5:15 per kilometer, or about 8:27 per mile after applying the 1.609344 km-per-mile conversion. Average speed is the reciprocal — distance divided by time, scaled to km/h and mph. The calculator handles the unit conversions and the awkward seconds arithmetic (52:30 is 3,150 seconds, not 52.3 minutes) that produces most manual pace errors.
The main use is race planning in reverse: a 4-hour marathon requires holding 5:41 per km for 42.195 km; a sub-25 5K requires 5:00 per km flat. Knowing the required pace before the gun changes how you run the first kilometers — the most common amateur race error is banking time early at a pace the goal never asked for, then paying it back double after the halfway mark. Even pacing, or a slightly negative split (second half marginally faster), is how the large majority of distance world records have been run.
Pace also organizes training. Easy runs belong 60-90 seconds per km slower than your threshold pace; intervals sit at or below 5K pace; long runs stay conversational. Anchoring each session to a pace range keeps easy days genuinely easy — the discipline most self-coached runners lack. Pair this calculator with the VO2 max and target heart rate tools: pace tells you what you're doing, heart rate tells you what it costs, and drift between the two over weeks is fitness changing.
Frequently asked questions
What pace do I need for a sub-2-hour half marathon?
5:41 per kilometer (9:09 per mile) held for 21.0975 km. Build in a few seconds per km of margin — course turns and aid stations cost real time.
Should I run even splits or start fast?
Even or slightly negative splits win. Time banked early at an unsustainable pace is repaid with interest late in the race — most distance records are negative splits.
What's a good beginner 5K pace?
Finishing between 30 and 40 minutes — 6:00 to 8:00 per km — is typical for new runners. Progress comes from consistent weekly mileage, mostly at an easy pace.
How do treadmill pace and road pace compare?
A flat treadmill is mechanically slightly easier than road running at the same displayed speed; a 1% incline is the standard equalizer for outdoor effort.
Take it with you
Every calculator, plus workout and macro tracking, in the ElevenSix Fitness app for iPhone.