Zerdly

Target Pace Calculator

Calculates the required pace per kilometre to hit a goal time over a distance.

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How to use this calculator

Enter details

Distance(km)
Goal time
::

Result

Fill in the fields to see your result.

Estimate only — real results depend on terrain, weather, fatigue, conditions and individual fitness. Not medical or coaching advice.

Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.

How to use this calculator

  1. Enter the distance (km) and your goal time.
  2. Read the pace per km / mile you need.

How it works

Required pace per km = goal time ÷ distance.

Worked example

Sub-4 marathon. 42.195 km in 4:00:00 needs about 5:41 /km.

Common mistakes

  • Setting a goal pace you cannot sustain — base it on recent race results, not hopes.
  • Ignoring terrain and heat, which can add 10–20 sec/km to the pace you can actually hold.

Tips

  • Times are estimates only — not medical or coaching advice. Always train safely and follow event rules.
  • Distances are editable: choose “Custom…” to enter your own course lengths.

Frequently asked questions

How do I find my target pace?

Divide your goal time by the race distance. The tool does this and shows the per-km and per-mile pace you need to average.

What is a realistic goal pace?

Anchor it to a recent race or time trial; a sensible step is a few seconds per km faster than your current fitness, not a leap.

Does it allow for fade?

No — it's an even-pace target. Use the Negative Split Planner to plan a faster second half.

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Cite this tool

Zerdly. (2026). Target Pace Calculator. Retrieved from https://www.zerdly.com/tools/target-pace-calculator/

Tip: Enter any known values to calculate the remaining results.

All calculations run in your browser. Your inputs are never saved or transmitted.