Marathon Time Calculator — Predict Your Finish Time

Predict your marathon finish time, get mile-by-mile splits, and see race time predictions based on the Riegel formula. Plan your 26.2 miles.

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Your Pace

8:03 per mile

5:00 per km

Speed (mph)

7.5 mph

Speed (kph)

12.0 kph

Pace /mile

8:03

Pace /km

5:00

Easy/Recovery

9:33 - 10:03 /mi

Tempo

7:33 - 7:48 /mi

Interval

7:03 - 7:18 /mi

Split Table
#DistanceSplitCumulative
11.00 miles8:028:02
22.00 miles8:0216:05
33.00 miles8:0224:08
43.11 miles0:5125:00
Race Time Predictions
RaceDistanceEstimated Time
1 Mile1.0 mi7:31
5K3.1 mi25:00
10K6.2 mi52:07
Half Marathon13.1 mi1:55:00
Marathon26.2 mi3:59:46

Race predictions use the Riegel formula and assume consistent training. Longer distances typically slow relative to shorter race paces.

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Last updated: March 2026

Average Marathon Finish Times

Marathon times vary widely based on age, experience, and training. The overall average is about 4:30. A sub-4-hour marathon is achieved by roughly 30% of finishers and is a common intermediate goal. Sub-3 hours is elite recreational territory, achieved by about 5% of finishers.

Common marathon time goals and their required paces: 5:00 marathon = 11:27/mile, 4:30 = 10:18/mile, 4:00 = 9:09/mile, 3:30 = 8:01/mile, 3:00 = 6:52/mile. Use our calculator above to find the pace for your specific goal time.

How to Pace a Marathon

The golden rule of marathon pacing is start conservative. Run your first 2-3 miles 10-15 seconds per mile slower than your target pace. The adrenaline and crowd energy at the start make it feel easy, but starting too fast almost always leads to suffering in the final 10K.

Aim for even or slightly negative splits — running the second half at the same pace or slightly faster than the first half. Elite marathoners often run the second half 1-2 minutes faster. Use our split table above to see exactly where you should be at each mile marker.

Frequently Asked Questions

What is the average marathon finish time?

The average marathon finish time in the US is about 4 hours 30 minutes. For men, the average is 4:22; for women, 4:47. These averages have increased over the past two decades as marathon participation has broadened to include more recreational runners.

What pace do I need for a 3-hour marathon?

A 3-hour marathon requires a pace of 6:52 per mile (4:16 per km). This is an elite recreational time achieved by roughly the top 5% of marathon finishers. To run a 3-hour marathon, you typically need a 5K time under 19 minutes.

How should I pace a marathon?

The most effective strategy is even or slightly negative splitting — running the second half equal to or slightly faster than the first half. Start 10-15 seconds per mile slower than your target pace for the first 2-3 miles. The most common mistake is starting too fast, which leads to dramatic slowdowns after mile 20.

What is the wall in a marathon?

The 'wall' typically hits around mile 18-22 when glycogen (stored energy) becomes depleted. Your body shifts to burning fat, which is less efficient. To push through or avoid the wall: train long runs, practice race-day nutrition (gels/sports drink every 30-45 minutes), and don't start too fast.

Can I predict my marathon time from a 5K?

Yes, using the Riegel formula: Marathon Time = 5K Time × (26.2/3.1)^1.06. A 25-minute 5K predicts roughly a 3:50 marathon. However, this assumes proper marathon-specific training. Without long run training, your actual marathon will be significantly slower than the prediction.

How many miles per week should I run for a marathon?

Most marathon training plans peak at 35-55 miles per week. Beginner plans typically top out at 35-40 miles, intermediate at 45-55, and advanced at 55-70+. The key is building gradually — increase weekly mileage by no more than 10% per week to avoid injury.

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