Half Marathon Finish Time Predictor
Enter your recent 5K time, 10K time, weekly mileage, or longest run distance and get a personalised predicted half marathon finish time instantly. No login or signup required.
Frequently asked questions
How accurate is this half marathon predictor?
The predictor uses established running performance formulas based on your current fitness baseline. Results are most accurate when based on a recent race time rather than weekly mileage.
What is a good half marathon finish time for a beginner?
Most first time half marathon runners finish between 2 hours and 2 hours 30 minutes. With a structured training plan most beginners can target finishing under 2 hours 15 minutes.
How do I use my 5K time to predict my half marathon time?
Enter your recent 5K time in the calculator above and select 5K time as your baseline. The predictor applies a standard performance conversion formula to estimate your half marathon finish time.
This app is not medical advice. Training guidance is for general fitness only. Consult a qualified professional if you have health concerns.