Free running calculator
Training Pace Calculator
Estimate easy, long run, steady, tempo, interval, and repeat paces from a recent race or time trial.
- Easy pace
- Tempo pace
- Interval pace
- Mile or kilometer output
Training ranges
Suggested pace bands
5K in 25:00 estimates9:55 / mile - 11:12 / mile
Projection uses a simple race-time curve. Adjust for heat, hills, fatigue, terrain, and recovery.
Long run
9:27 / mile - 10:27 / mileControlled long runs where finishing smooth matters.Steady
8:54 / mile - 9:32 / mileModerate efforts that are quicker than easy but not a race.Tempo
8:36 / mile - 9:08 / mileSustainably hard threshold-style running.Interval
7:49 / mile - 8:13 / mileShort repeats with recovery between efforts.Repeat / strides
7:04 / mile - 7:33 / mileFast controlled reps, strides, or short hill efforts.- Benchmark pace
- 8:03 / mile
- Estimated 5K
- 25:00
- Estimated 10K
- 52:04
- Estimated half marathon
- 1:54:45
- Estimated marathon
- 3:59:12
How the training pace calculator works
The calculator starts with one recent benchmark effort, such as a 5K, 10K, mile time trial, half marathon, or custom distance. It converts that effort into pace, then uses a simple race-time projection curve to estimate equivalent race paces at nearby distances.
Those projected paces become anchors for practical training ranges. Easy and long-run paces are intentionally slower. Tempo, interval, and repeat paces are faster and should be used with more recovery and less total volume.
What each training pace means
Easy pace should feel conversational and sustainable. Long-run pace is controlled enough that the final miles do not turn into a race. Steady pace is quicker, but still below a true threshold effort.
Tempo pace is a sustainably hard effort, interval pace is closer to shorter-race intensity, and repeat pace is best reserved for short controlled efforts. The calculator gives ranges because training by feel matters more than chasing one exact second on every workout.
Training pace zones at a glance
Use the ranges as workout labels, not as strict commands. The right pace on a given day can shift with weather, terrain, fatigue, and recovery.
| Zone | Typical feel | Common use |
|---|---|---|
| Easy | Conversational | Recovery, aerobic mileage, relaxed runs |
| Long run | Controlled | Endurance building without racing the workout |
| Steady | Moderate | Progression runs or sustained aerobic work |
| Tempo | Sustainably hard | Threshold-style efforts with enough recovery |
| Interval | Hard repeats | Shorter reps with planned recovery |
Why recent effort matters
A current benchmark is more useful than an old personal best. Fitness changes with consistency, sleep, stress, weather, course profile, altitude, and injury history. A hot or hilly race may understate your fitness, while a downhill course may overstate it.
If the paces look too aggressive for normal training, slow them down. Building aerobic consistency usually matters more than forcing every run into a calculator range.
When to adjust the suggested paces
Slow the ranges down when it is hot, humid, windy, hilly, icy, or when the route includes trail surfaces, stoplights, or crowded paths. Also adjust after poor sleep, illness, travel, high stress, or a hard workout earlier in the week.
If every run requires race-level effort to hit the calculator range, the benchmark may be too aggressive or no longer current. Use an easier benchmark, reduce the pace targets, or keep the effort conversational until training feels stable again.
Training pace limits
This page is a planning tool, not medical advice, coaching advice, or a personalized training plan. It does not know your health history, injury risk, weekly mileage, sleep, strength work, heat tolerance, or recovery needs.
Use the results as a starting point. If you are returning from a break, building from low mileage, preparing for a military fitness test, or dealing with pain, use conservative paces and get qualified guidance when needed.