health

Marathon Pace Calculator

Q: What pace do I need for a sub-4 marathon?

A sub-4-hour marathon (42.195 km) requires an average pace of 5:41 min/km (9:09 min/mile) or faster.

Q: How much slower is marathon pace than half marathon?

Typically 15-30 seconds per km slower. The Riegel formula estimates: marathon time ≈ half marathon time × 2.099.

Q: How do I use the Running Pace Calculator?

Open the page and fill in the input fields — results update automatically. Pace per km/mile, speed and finish time.

Q: Are the results accurate?

Results follow published international standards (WHO, ACE, IOM) and are for reference only.

Q: Can this replace medical advice?

No. Always consult a qualified healthcare professional for health decisions.

Marathon pace calculator: enter your target finish time (full or half) to get the required pace per kilometer/mile, plus split times for every checkpoint.

Free online · Instant results

Pace (min/km) = total time ÷ distance. 1 mile = 1.609 km. Splits assume even pacing — real races: start 5-10 s/km slower.

Distance

Finish time (h : m : s)

Your pace

1'18"/km

Elite (sub-4 pace)

Speed46.03 km/h

Pace per mile2'06"/mi

Per 400m lap0:31

LevelElite (sub-4 pace)

Step-by-step

1Total time: 0:55:00 = 3,300 s
2Pace = time ÷ distance = 3,300 ÷ 42.195 = 78.2 s/km = 1'18"/km
3Speed = 3600 ÷ 78.2 = 46.03 km/h

Finish times at 1'18"/km

Event	Distance	Finish time
5K	5 km	6:31
10K	10 km	13:02
Half marathon	21.0975 km	27:30
Marathon	42.195 km	55:00

💡 Level reference (pace/km): <4'00 elite, 4-5' competitive, 5-6' advanced, 6'-7'30 recreational, beyond beginner. Negative split (second half faster) is the pro racing strategy.

Frequently Asked Questions

What pace do I need for a sub-4 marathon?▼

A sub-4-hour marathon (42.195 km) requires an average pace of 5:41 min/km (9:09 min/mile) or faster.

How much slower is marathon pace than half marathon?▼

Typically 15-30 seconds per km slower. The Riegel formula estimates: marathon time ≈ half marathon time × 2.099.

How do I use the Running Pace Calculator?▼

Open the page and fill in the input fields — results update automatically. Pace per km/mile, speed and finish time.

Are the results accurate?▼

Results follow published international standards (WHO, ACE, IOM) and are for reference only.

Can this replace medical advice?▼

No. Always consult a qualified healthcare professional for health decisions.

💡

This is a dedicated variant of the Running Pace Calculator, pre-configured for this scenario with tailored FAQs.