Marathon Pace Calculator

Calculate the pace needed for a target marathon finish time.

About Marathon Pace Calculator

Dividing the target time by the race distance gives the pace that must be held throughout. The halfway split is the checkpoint that reveals whether the pace is on track early enough to correct. Marathon pace must be sustainable for over three hours, and starting even ten seconds per kilometre too fast typically costs several minutes in the final ten kilometres.

Formula

Marathon Pace

Pace = finish time ÷ the marathon distance of 42.195 km

pace: Time per kilometre needed to hit the target
even splits: Running the second half at the same pace as the first

Worked example

With the default values below, Marathon Pace Calculator returns Required Pace of 5.3324. Change any input above and every figure here is recalculated in your browser.

Inputs used

Target finish hoursaccepts 0–24 h: 3 h
Target finish minutesaccepts 0–59 min: 45 min
Target finish secondsaccepts 0–59 s: 0 s

Results

Required Pace: 5.3324 min/km
Required Pace: 5:20 per km
Required Speed: 11.252 km/h
Required Pace per Mile: 8.5816 min/mile
Halfway Split: 1:52:30

Step by step

1Values used
2Marathon Pace
3Required Pace= 5.3324 min/km
4Required Pace= 5:20 per km
5Required Speed= 11.252 km/h
6Required Pace per Mile= 8.5816 min/mile
7Halfway Split= 1:52:30

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.

Frequently Asked Questions

How is Marathon Pace calculated?

Pace = finish time ÷ the marathon distance of 42.195 km Dividing the target time by the race distance gives the pace that must be held throughout. The halfway split is the checkpoint that reveals whether the pace is on track early enough to correct.

Why does Marathon Pace matter?

Marathon pace must be sustainable for over three hours, and starting even ten seconds per kilometre too fast typically costs several minutes in the final ten kilometres.

What values do I need to enter?

This calculator takes 3 inputs: Target finish hours, Target finish minutes, Target finish seconds. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.