Question 1

What pace do I need for a 4-hour marathon?

Accepted Answer

A 4:00:00 marathon requires an average pace of approximately 9:09 per mile or 5:41 per kilometer. In practice, most runners aim for 9:05/mi to build a small buffer for water stops and late-race slowdown.

Question 2

Should I run even splits or negative splits?

Accepted Answer

Research on marathon pacing shows that the fastest finishers tend to run close to even splits, with the second half no more than 1-2% slower than the first. Aggressive negative splits are rare at the elite level. For most recreational runners, starting conservatively and running the second half at the same pace is the safest strategy.

Question 3

How do I account for hills in my pace plan?

Accepted Answer

Hills will naturally slow you down on the uphill and speed you up on the downhill, but the net effect is usually a slower overall time. Use the Difficulty Analyzer to estimate how much a hilly course will affect your pace, then adjust your target splits accordingly.

Question 4

Can I embed this calculator on my running club website?

Accepted Answer

Yes. Click the embed button to get an iframe code snippet that you can paste into any website or blog. The embedded version is responsive and works on mobile devices.

Question 5

What is the difference between pace and speed?

Accepted Answer

Pace is measured in minutes per mile (or km) and tells you how long each unit of distance takes. Speed is measured in miles (or km) per hour and tells you how far you travel in a given time. Runners typically think in pace because it maps directly to split times on the course.

Finish time	Per mile	Per km
3:00:00	6:52	4:16
3:30:00	8:01	4:59
4:00:00	9:09	5:41
4:30:00	10:18	6:24
5:00:00	11:27	7:07

Marathon Pace Calculator

Projected Finish Times

Race Splits

How runners use this tool

Marathon pace by finish time

How Pace Is Calculated

Frequently Asked Questions

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