Pace is simply how long it takes to cover one unit of distance — minutes per kilometre or per mile — and it is the language runners use. It is just time ÷ distance; a lower number means a faster run. Its mirror image is speed (distance ÷ time, in km/h or mph), where a higher number is faster. Converting between km and miles uses one constant: 1 mile = 1.60934 km. Knowing your pace lets you set a race target and hold the right effort across the distance.
Reviewed: June 20, 2026 · Author: Naveen P N, Founder — AI Calculator · Verified against: pace = time ÷ distance and the mile↔km factor.
The pace equations
Dividing the total time by the distance gives the average time per kilometre. Because a mile is longer than a kilometre, a per-mile pace is a larger number — multiply the per-km pace by 1.60934 to get it. Speed inverts the relationship: distance over time, expressed per hour. To display a decimal pace in the usual m:ss form, keep the whole minutes and turn the fractional part into seconds by multiplying by 60.
Worked example — a 10 km run
Scenario: 10 km covered in 50 minutes.
So 10 km in 50 minutes is a steady 5:00 per km — about 8:03 per mile, or 12 km/h (7.46 mph). Change the finish time and the pace scales directly: 40 minutes is a brisk 4:00 /km (15 km/h), while 60 minutes is an easy 6:00 /km (10 km/h). To plan a race, flip it around — pick a goal time, divide by the distance, and train at that pace. A sub-50-minute 10 km, for instance, simply means holding 5:00 /km or quicker.
Frequently Asked Questions
Time ÷ distance. 10 km in 50 min = 5:00 /km.
Inverses. Pace = time/distance (lower faster); speed = distance/time (higher faster). 5:00/km = 12 km/h.
1 mile = 1.60934 km. Pace/mile = pace/km × 1.60934. 5:00/km ≈ 8:03/mile.
Keep the minutes; ×60 the decimal for seconds. 8.05 → 8:03.
Goal time ÷ distance = goal pace. Sub-50 10 km → 5:00 /km. Train at goal pace.