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Running Pace Calculator

Enter any two of pace/distance/time and get the third. See finish times for 5K, 10K, half marathon, and marathon at your pace.

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km
::
Your pace
5:30 /km
Speed
10.91 km/h
6.78 mph

Race finish times at this pace

RaceDistanceFinish time
1 mile1.60934 km8:51
5K5 km27:30
10K10 km55:00
Half Marathon21.0975 km1:56:02
Marathon42.195 km3:52:04
1 mile
8:51
5K
27:30
10K
55:00
Half Marathon
1:56:02
Marathon
3:52:04

How to use Running Pace Calculator

The running pace calculator solves for any one of three running variables — pace, distance or finish time — given the other two. It supports kilometres and miles, includes speed conversion, optional calorie estimation and a race split table showing projected finish times at your current pace for five standard race distances: 1 mile, 5K, 10K, half marathon and full marathon.

  1. Select your unit (km or mi) and calculation mode(Find Pace, Find Distance, or Find Time).
  2. Enter the two known values for your chosen mode.
  3. Optionally enter body weight to estimate calories burned.
  4. Read your result, speed in km/h and mph, and projected race finish times.

Your data never leaves your device — 100% private processing.

Pace, speed and the conversion between them

Pace (minutes per km or mile) and speed (km/h or mph) are reciprocals: speed = 60 ÷ pace_in_minutes, pace_in_minutes = 60 ÷ speed. A 5:00 min/km pace equals exactly 12 km/h. A 6:00 min/km pace equals 10 km/h. Understanding the relationship helps runners set treadmill speeds and interpret race feedback.

Calorie estimation from running pace

Calories burned running depend on body weight and speed. The MET value of running scales roughly with speed: METs ≈ speed_km/h × 0.8 (capped between 6 and 20). Calories = MET × weight_kg × duration_hours. A 70 kg runner at 10 km/h (MET ≈ 8) burns about 280 kcal in 30 minutes. Actual values can vary ±15% based on terrain, fitness and running economy.

Worked examples

5K in 25:00

Inputs: 5 km in 25 minutes

Result: 5:00 min/km (≈ 8:03 min/mile · 12 km/h)

Marathon at 5:30/km

Inputs: 5:30 min/km over 42.195 km

Result: ≈ 3:52:04 finish time

Pace and speed conversions

Pace and speed conversions
Pace (min/km)Pace (min/mile)Speed (km/h)
4:006:2615.0
5:008:0312.0
6:009:3910.0
7:0011:168.6

Glossary

Pace
Time taken to cover one unit of distance (e.g., minutes per kilometre).
MET
Metabolic Equivalent of Task — running intensity expressed as a multiple of resting metabolic rate.
Half marathon
A race of 21.0975 km (13.1094 miles), half the length of a full marathon.
Marathon
A standard road race of 42.195 km (26.219 miles).

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