Marathon Pace Calculator
Plan your marathon race pace and get per-km/mile splits for your target finish time.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
Marathon Pace Calculator
Pace per km
5:41/km
Pace per mile
9:09/mi
Half Marathon
2:00:00
Estimated
This tool provides general sports and fitness estimates for educational purposes only. It is not medical advice — consult a physician before starting or intensifying training, especially if you have a cardiovascular condition.
About the Marathon Pace Calculator
The marathon pace calculator works out the pace per kilometre and per mile needed for a target marathon time over the full 42.195 km (26.2 miles), along with the matching half-way split. Running even splits is usually the most efficient way to reach a time goal.
How to use it
- 1Enter your target hours.
- 2Enter the target minutes.
- 3Read the pace per km, pace per mile and half-way time.
Worked example
a 4-hour marathon needs 5:41 per km (9:09 per mile), passing halfway in 2:00:00.
Common use cases
- Planning race-day pacing
- Setting training paces
- Choosing a pacing group
Frequently asked questions
A:You need to run at 5:41 min/km (9:09 min/mile) consistently.
A:Most first-time marathoners finish in 4–5 hours. Completing is the primary goal.
Reviewed for accuracy · Last updated October 7, 2026
Formulas follow published sports-science literature and official league definitions (Karvonen heart rate reserve, Cooper and Bruce protocols, MET compendium values, and standard baseball, cricket, and basketball statistics).
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources