What pace for a sub-3 marathon?

A sub-3-hour marathon requires averaging 4:15 min/km (6:52 min/mile) or faster over 42.195 km.

What pace for a sub-20 5K?

A sub-20-minute 5K requires averaging 3:59 min/km (6:26 min/mile) or faster.

Should I run even splits or negative splits?

Most coaches recommend even pacing or slight negative splits (second half faster). Running too fast early leads to significant slowdowns later in the race.

How do I account for hills in my race pace?

On hilly courses, aim for even effort rather than even pace. You will naturally slow on uphills and speed up on downhills. Your overall pace should still average to your target.

RunCalcs

Race Pace Calculator — Hit Your Goal Time

Calculate the exact pace per km you need to achieve your race goal time.

Goal Hours

Time in hours

Goal Minutes

Time in minutes

Goal Seconds

Time in seconds

Race Distance

Distance measurement

How We Calculate This

Race Pace Calculation

Required Pace = Goal Time / Race Distance

This gives you the pace per kilometre needed to maintain throughout the race. The calculator also shows cumulative split times at key distance markers.

Standard race distances: 5K = 5 km, 10K = 10 km, Half Marathon = 21.0975 km, Marathon = 42.195 km.

Frequently Asked Questions

Related Calculators

Pace Calculator

Calculate your pace per km or mile from distance and time.

Finish Time Calculator

Predict your finish time for any distance based on your pace.

Speed Calculator

Convert between pace and speed in km/h or mph.

Negative Split Calculator

Plan a negative split strategy with faster second-half pacing.

Even Split Calculator

Calculate even splits for any race distance and target time.

Last updated: February 2026

All calculations are estimates. Always consult a coach or medical professional for personalised training advice.