Calculate training paces for 5K and 10K races using VDOT-based methodology. Get easy, tempo, interval, and repetition pace zones from a recent race time.
This calculator turns a recent 5K or 10K result into common training pace ranges such as Easy, Marathon, Tempo, Interval, and Repetition.
The approach is inspired by Daniels-style race-based training systems, where recent performance is used to set practical workout targets for different sessions.
Use the outputs as starting paces for training and adjust for terrain, weather, and recovery status.
It can help separate easy running from faster workouts so sessions are closer to their intended purpose. The pace ranges are guides, not exact prescriptions, but they are useful for avoiding the common habit of running everything at the same effort.
VDOT Estimation: VDOT is an index of running fitness derived from race performance. Pace zones are percentages of race pace: • Easy: 59–74% VO₂max (~65–79% race pace intensity) • Marathon: 75–84% VO₂max • Tempo: 83–88% VO₂max (lactate threshold) • Interval: 95–100% VO₂max • Repetition: > 100% VO₂max (anaerobic)
Result: Easy: 10:50–11:33/mi | Tempo: 9:06/mi | Interval: 8:20/mi | Rep: 7:53/mi
A 25-minute 5K (8:03/mi) translates to a VDOT of approximately 36. Easy runs should be 10:50–11:33/mi, feeling relaxed enough to hold a conversation. Tempo runs at 9:06/mi target the lactate threshold. Interval pace (8:20/mi) develops VO₂max in 3–5 minute repeats. Repetition pace (7:53/mi) for short, fast repeats builds speed.
Each training zone targets a specific physiological system. Easy pace develops the aerobic base; threshold pace raises lactate clearance; interval pace improves VO₂max; repetition pace supports speed and running economy.
Many runners do best when most mileage stays truly easy and only a smaller share is hard. The calculator helps separate those paces so every session has a clearer purpose.
Training paces assume flat terrain and moderate weather. Heat, hills, and fatigue can all shift the right pace for the day.
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The calculator converts a recent race result into a VDOT-style performance estimate and then maps that estimate to common training paces. It is a planning worksheet for run training, not a guarantee that any one workout pace will fit every day or every course.
VDOT is a measure of running fitness developed by coach Jack Daniels. It represents the VO₂max you would need to achieve your race time, adjusted for running economy. A higher VDOT means greater fitness.
Easy pace develops the aerobic system with minimal stress. Running faster does not improve those adaptations very much but adds fatigue that can hurt workout quality.
Tempo pace targets the lactate threshold, while interval pace targets VO₂max. Tempo is usually more sustainable; interval work is shorter and harder.
A typical week includes several easy runs plus one tempo or threshold session and one interval or speed session, with total hard sessions kept moderate.
The training paces are still useful as a starting point. The calculator is most helpful when you want a current fitness anchor rather than a race-specific prediction.
Both approaches work. Pace is more precise and repeatable, while heart rate can better reflect fatigue, heat, and elevation.