Half Marathon Pace Calculator

Calculate the pace and speed needed to finish a half marathon (21.0975 km) in a target time.

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  • Accurate results
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  • Works on all devices
Enter a target finish time to calculate the pace needed for a half marathon (21.0975 km).

Your result

5:41

Pace (min/km)

Pace (min/mile)9:09
Speed10.55 km/h

AI explanation

Formula

Pace = target time / 21.0975 km

Worked example

2:00:00 target time

Worked example: 2:00:00 target time
FieldValue
Hours2
Minutes0
Seconds0
Pace (min/km)5:41

Assumptions

  • Uses the standard half marathon distance of 21.0975 km (13.1 miles).
  • Assumes an even, constant pace across the full race — actual pacing strategies vary.
  • Informational only.

Frequently asked questions

What pace do I need for a 2-hour half marathon?

A 2:00:00 half marathon requires an average pace of about 5:41 per km (9:09 per mile).

What's the official half marathon distance?

21.0975 kilometers (13.1094 miles) — exactly half the marathon distance of 42.195 km.

Should I run the whole race at exactly this pace?

Many runners use an even-pacing or slight negative-split strategy (running the second half slightly faster), but individual race strategy varies with course profile and experience.

Related calculators

Marathon Pace CalculatorRace Time Predictor

This calculator provides a general estimate only.

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