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🏃 Running Pace Calculator

Calculate your running pace, finish time, or distance. Get race projections for 5K, 10K, half marathon, and marathon — plus pace in both min/km and min/mile.

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Running Pace Formulas

Pace = Time ÷ Distance
Time = Pace × Distance
Distance = Time ÷ Pace

Pace is expressed as time per unit distance (min/km or min/mile). Speed is the inverse: distance ÷ time, expressed in km/h or mph. To convert: speed (km/h) = 60 ÷ pace (min/km).

How to Use the Running Pace Calculator

  1. 1
    Choose What to Calculate
    Select "Find Pace" to calculate your pace from distance and time, "Find Time" to estimate a finish time, or "Find Distance" to see how far you can run at a given pace.
  2. 2
    Select Your Units
    Toggle between kilometres and miles. Pace will be shown in both min/km and min/mile regardless of your selection.
  3. 3
    Enter Your Values
    Fill in the required fields. Time uses three boxes (hours, minutes, seconds). Pace uses minutes and seconds per unit distance.
  4. 4
    View Results
    See your result plus speed in km/h and mph. When pace is known, race projections for 5K, 10K, half marathon, and marathon are shown automatically.

Example Calculation

Running 10 km in 55 minutes:

Pace = 55 min ÷ 10 km = 5:30 min/km
Convert to min/mile: 5:30 × 1.60934 = 8:51 min/mile
Speed = 60 ÷ 5.5 = 10.9 km/h
Marathon projection = 5:30 × 42.195 = 3:52:04

Frequently Asked Questions

Running pace is the time it takes to cover one unit of distance — usually expressed as minutes per kilometre (min/km) or minutes per mile (min/mile). For example, a 5:30 min/km pace means it takes 5 minutes and 30 seconds to run each kilometre. Pace is the inverse of speed: a faster runner has a lower pace number.

Improvement comes from a mix of consistent easy mileage, interval training, and tempo runs. Easy runs (around 60–70% of max heart rate) build aerobic base. Interval sessions — short, fast efforts with recovery — improve VO2 max. Tempo runs at your lactate threshold teach your body to sustain a comfortably hard effort. Aim to increase weekly mileage by no more than 10% per week to avoid injury.

A beginner pace of 7:00–9:00 min/km (11:15–14:30 min/mile) is perfectly normal and healthy. The most important goal when starting out is to build the habit and aerobic base — not to run fast. Many beginners benefit from the run/walk method, alternating 1–2 minutes of running with 1 minute of walking. As fitness improves over weeks and months, pace will naturally drop.

Multiply your pace (in seconds per km) by the marathon distance (42.195 km). For example, at 5:30 min/km (330 seconds/km): 330 × 42.195 = 13,924 seconds = 3 hours, 52 minutes, 4 seconds. The Race Projections table in this calculator does this automatically once you enter a pace. Note that real marathon times typically add 5–10% over your training pace due to race-day fatigue.

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