The core relationship
Pace equals elapsed time divided by distance. Speed is the inverse relationship: distance divided by elapsed time. Keep the distance unit consistent before comparing results.
Running guide
Running Pace Guide: Pace, Speed, Finish Time, and Training
Learn how pace, speed, distance, and finish time relate, with examples for miles and kilometers and practical training use cases.
Reviewed by FormatNest Editorial Team. Updated August 19, 2026.
Example
A 5K in 30 minutes is 6:00 per kilometer. Convert the distance to miles when you want a per-mile pace, or enter a target pace and distance to estimate finish time.
Use it for planning
Runners use pace calculations to set race targets, create interval splits, compare treadmill settings, and estimate finish windows. Conditions, hills, heat, and fatigue can make real-world performance differ from the estimate.
Check your units
Kilometers and miles are different distances. Confirm the unit shown beside each input before using the result in a race plan or training log.
Primary reference: FormatNest Running Pace Calculator. This guide is educational and does not replace professional advice.