Half Marathon Time Calculator
Predict your half marathon finish time from your pace, a recent 5K or 10K, or a run-walk strategy. See how your time compares by age and gender.
Pace to Finish Time
Enter your running pace to calculate your half marathon finish time
Half Marathon Finish Time
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Half Marathon Finish Time by Pace
Quick reference table showing half marathon finish times for common running paces. Find your usual training pace and see what that translates to over 13.1 miles.
Average Half Marathon Time by Age and Gender
These averages come from analyzing hundreds of thousands of half marathon results across major races. Find your age group to see how the average runner in your bracket performs.
Is My Half Marathon Time Good?
Compare your finish time to the general half marathon population. These percentiles are based on aggregated race results and give you a sense of where you stand among all finishers.
How This Calculator Works
This calculator predicts your half marathon finish time in three ways. The pace-to-time mode multiplies your pace per mile (or km) by the half marathon distance of 13.1094 miles. Simple math, but essential for setting realistic goals.
The race prediction mode uses the Riegel formula (T2 = T1 x (D2/D1)^1.06), which is the gold standard for estimating performance across distances. It accounts for the natural slowdown that occurs as race distance increases. A 25-minute 5K runner will not run at the same pace for a half marathon because fatigue compounds over longer distances.
The walk break calculator is unique to this tool. It calculates your effective pace by weighting the time you spend running versus walking, then applies that effective pace to the full 13.1 miles. This is valuable for runners using the Jeff Galloway run-walk-run method or anyone planning to take walk breaks through water stations.
For pace-focused calculations and mile-by-mile split tables, check out our half marathon pace calculator. For predictions across all race distances, use our race pace calculator.
Make Every Training Run Count
Half marathon training is a 12 to 16 week commitment. Motera gives every one of those runs a purpose beyond the finish line. Capture territory on your long runs, compete on leaderboards during tempo sessions, and explore your city through Fog of War on recovery days.
Your half marathon journey builds more than just fitness. It builds your empire on the map.
MoteraFrequently Asked Questions
What is the average half marathon finish time?
The average half marathon finish time across all ages and genders is approximately 2:01 to 2:05. For men, the average is around 1:55 to 2:00. For women, the average is around 2:10 to 2:15. These averages come from large race datasets and vary by course, weather, and the competitive level of the event.
Can I walk during a half marathon and still finish?
Absolutely. Many half marathon runners use a run-walk strategy. A common approach is running for 4 minutes and walking for 1 minute. This typically adds 10 to 20 percent to your finish time compared to running the entire way, but it reduces fatigue and muscle damage significantly. Most half marathons have a time limit of 3.5 to 4 hours, which allows plenty of room for walk breaks.
How accurate is predicting a half marathon from a 5K time?
The Riegel formula is accurate to within 2 to 5 percent for most trained runners. The prediction assumes you have trained adequately for the half marathon distance. If you only train for 5K distances, your actual half marathon time will likely be slower than the prediction because your endurance base will not be developed enough for 13.1 miles.
Is a 2-hour half marathon good?
A 2:00 half marathon is a solid achievement that puts you in roughly the top 40 to 50 percent of all half marathon finishers. It requires an average pace of 9:09 per mile, which is very achievable for runners who train consistently for 3 to 4 months. For many runners, breaking 2 hours is their first major half marathon milestone.
What is a good half marathon time for my age?
Performance varies significantly by age group. A 25-year-old male running 1:45 is performing at a similar relative level as a 55-year-old male running 2:05. The age and gender table on this page shows average times by decade. Use it to find where you stand relative to your peers rather than comparing to the overall average.
How do I calculate my half marathon time from my pace?
Multiply your pace per mile by 13.1094 (the half marathon distance in miles). For example, at 9:00 per mile, your finish time is 9 x 13.1094 = 117.98 minutes, or about 1:58:00. If using kilometers, multiply your pace per km by 21.0975. The calculator on this page does this automatically.
Should I use a walk break strategy for my first half marathon?
Yes, this is a smart strategy for first-time half marathon runners. The Jeff Galloway method recommends run-walk intervals from the very start (not just when you get tired). Popular ratios include 4:1 (run 4 minutes, walk 1), 3:1, or 2:1. Starting with walk breaks from mile 1 keeps your heart rate lower and saves your legs for the final miles.
