Training Pace Calculator
Enter a recent race result to get personalized training zones: Easy, Marathon, Threshold, Interval, and Repetition paces based on proven VDOT methodology.
Enter Your Recent Race
Use your most recent race result (ideally from the last 4–6 weeks) for the most accurate training paces.
Understanding Training Zones
Easy / Recovery Pace
Easy runs build your aerobic base and promote recovery. You should be able to carry on a full conversation at this pace. Easy runs make up 70–80% of most training plans and are the foundation of distance running fitness. Don't underestimate them — running easy allows you to absorb harder workouts.
Long Run Pace
Long runs build endurance and teach your body to burn fat efficiently. The pace is similar to or slightly slower than easy pace, depending on distance. For marathon training, long runs at the faster end of this range prepare you for race-day fatigue.
Marathon Pace
The pace you'd sustain for a full marathon (26.2 miles). This zone develops your ability to run at a comfortably hard effort for extended periods. Marathon pace workouts are typically 8–15 miles and help you learn what race pace feels like.
Threshold / Tempo Pace
Threshold pace is the intensity at which lactate begins to accumulate faster than your body can clear it — often called your "lactate threshold." You can sustain this pace for roughly 50–60 minutes in a race. Tempo runs (20–40 minutes at threshold pace) are one of the most effective workouts for improving your racing speed.
Interval / VO₂max Pace
Intervals at VO₂max pace improve your body's maximum oxygen uptake. These are hard, controlled efforts typically done as 800m–1600m repetitions with equal-time recovery jogs. This pace closely matches your 3K–5K race pace.
Repetition Pace
The fastest training zone. Repetition workouts (200m–400m at near-top speed) develop running economy and neuromuscular efficiency — teaching your legs to turn over quickly and efficiently. Full recovery between reps is essential.
How to Use These Paces
- Use a recent race — Your training paces are only as accurate as the race result you enter. Use a race from the last 4–6 weeks where you ran a genuine best effort.
- Start with longer distances — A 5K or 10K result tends to give the most accurate training paces for most runners. Mile results may underestimate your distance-running ability.
- Respect the easy pace — Most runners run their easy days too fast. If your easy pace feels too slow, it's probably correct.
- Adjust for conditions — Add 10–20 seconds per mile for heat (>75°F), humidity, altitude, or hilly terrain.
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Training Pace Calculator FAQ
VDOT is a measure of running fitness developed by exercise physiologist Jack Daniels. It's derived from your race performance and represents your current aerobic capacity. A higher VDOT means faster paces. The training paces generated are matched to your VDOT so every workout targets the right physiological system.
A 5K or 10K race generally gives the most accurate estimate because these distances are long enough to reflect aerobic fitness but short enough that most runners can truly race them all-out. A mile race may underestimate your distance paces, while a marathon involves pacing skills that can skew the input.
Recalculate every 4–8 weeks or after any new race PR. As your fitness improves, your training paces should get faster. Using stale paces means your workouts may be too easy to drive further adaptation.
This is extremely common. Most runners habitually run their easy days too fast, which leads to fatigue and stagnation. Truly easy running should feel effortless. Trust the calculator: easy pace should allow full conversation without gasping. The aerobic gains happen regardless of how slow it feels.
They're often used interchangeably. Technically, threshold pace is the intensity at your lactate threshold — roughly your 60-minute race pace. Tempo runs are sustained efforts at or near threshold pace, typically 20–40 minutes. Both target the same system; tempo is the workout, threshold is the intensity.