Pace Calculator
Estimate the pace of a run, walk, or ride — or work backwards from a pace to a finish time or a distance. Give the solver any two of time, distance, and pace; it finds the third, projects your pace onto popular race distances, and lays out your splits.
Enter time and distance — the calculator finds your pace.
Placeholder zeros are optional in the time and pace fields — 5 minutes 3 seconds can be entered as 5:3.
At this pace, the times required for popular race distances are:
Splits:
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(300 x 250)
Multipoint Pace Calculator
If you record your time at checkpoints along a route — and know the distance to each — this tool works out how fast each segment was, and how your overall pace evolved. Run the same route repeatedly and the segment table shows exactly where you gain or lose time.
| Distance (cumulative) | Time (hh:mm:ss) | ||
|---|---|---|---|
Pace Trends for Sections
Pace Converter
hh:mm:ss
Finish Time Calculator
Mid-race math: tell it how far you have covered and how long it took, and it projects your finish time for the full distance at your current pace.
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Typical races and world record paces
To feel what the numbers mean, compare your pace against the fastest humans alive. World record pace barely changes between 100 m and 200 m — sprinters are already at top speed — then stretches steadily as distance forces an aerobic bargain.
| Category | Men's World Record Pace | Women's World Record Pace |
|---|---|---|
| 100 meters | 2:35/mile or 1:36/km | 2:49/mile or 1:45/km |
| 200 meters | 2:35/mile or 1:36/km | 2:52/mile or 1:47/km |
| 400 meters | 2:54/mile or 1:48/km | 3:12/mile or 1:59/km |
| 800 meters | 3:23/mile or 2:06/km | 3:48/mile or 2:21/km |
| 1,500 meters | 3:41/mile or 2:17/km | 4:07/mile or 2:34/km |
| 1 mile | 3:43/mile or 2:19/km | 4:13/mile or 2:37/km |
| 5K | 4:04/mile or 2:31/km | 4:34/mile or 2:50/km |
| 10K | 4:14/mile or 2:38/km | 4:45/mile or 2:57/km |
| Half Marathon (13.11 miles / 21.098 km) | 4:27/mile or 2:46/km | 4:58/mile or 3:05/km |
| Marathon (26.22 miles / 42.195 km) | 4:41/mile or 2:55/km | 5:10/mile or 3:13/km |
Training through pace and heart rate
Pace measures movement; heart rate measures cost — the number of heart contractions per minute. The two rise together, and using both in training is how you improve performance without over-training: pace tells you what you did, heart rate tells you what it took.
A typical adult resting heart rate sits between 60 and 100 bpm (some argue the healthy band is really 50–90); lower usually means a more efficient heart, though anything under 50 or over 90 deserves a doctor's look. Maximum heart rate is pinned down properly only by a cardiac stress test — ten to twenty minutes of escalating effort under supervision — so most people estimate it with the most cited formula in fitness:
MHR = 220 − age
Treat that number as a sketch, not a measurement: it carries no standard deviation, and real maximums scatter widely between similar people. Still, zones built on it are useful references — an intensity of 60–70% of MHR is the classic fat-burning band, and steady aerobic work generally lives around 55–85% of MHR for 20–30 minutes at a time.
Aerobic vs. anaerobic
Aerobic exercise (roughly 70–80% of MHR) is light activity sustained for a long time: oxygen supply meets demand, and muscles produce their energy cleanly. Anaerobic exercise (roughly 80–90%) is the short, intense end — oxygen can't keep up, muscles burn sugar directly, and the byproduct, lactate, produces the familiar burn and eventually forces a stop if it isn't cleared. The pace you can hold while staying aerobic — your aerobic threshold pace — is the foundation of marathon training, because it balances fat and carbohydrate use and can be held for hours. The anaerobic (lactate) threshold is where glycogen takes over as the primary fuel and lactate starts accumulating faster than it can be removed; threshold training exists to push that point later, which is another way of saying: farther and faster before the wall.
Labs measure thresholds directly, but a good field estimate comes from a 2005 study's method: run a solo 30-minute time trial at maximum sustainable effort and average your heart rate over the last 20 minutes — that average estimates your lactate threshold heart rate (in a group, extend the trial to 60 minutes). Subtract 30 bpm and you have an estimate of your aerobic threshold heart rate.
FAQ
How do I calculate pace from time and distance?
Divide time by distance: 50:25 over 5 km is 3,025 ÷ 5 = 605 seconds per kilometer, a 10:05/km pace. The solver above also converts it to per-mile, mph, kph, meters per minute, and meters per second in one pass.
Pace or speed — which should I train with?
Runners think in pace because races are fixed distances and the question is time per kilometer. Cyclists think in speed because wind and terrain make distance-per-hour the natural readout. They are the same information, inverted — the converter above flips between them.
How accurate is the finish time projection?
It assumes you hold your current pace exactly — no fade, no kick, no hills. Real races drift, which is why the multipoint tool matters: it shows whether your segments are speeding up or slowing down, so the projection can be believed or discounted.