Pace Calculator
Last updated: June 2026 · Free · No sign-up required
Enter values above and click Calculate to see your result instantly.
Quick reference
Finish times by pace:
| Pace /mi | 5K | 10K | Half | Marathon |
|---|---|---|---|---|
| 7:00 | 21:45 | 43:30 | 1:31:46 | 3:03:33 |
| 8:00 | 24:51 | 49:42 | 1:44:53 | 3:29:46 |
| 9:00 | 27:58 | 55:56 | 1:58:00 | 3:55:59 |
| 10:00 | 31:04 | 1:02:08 | 2:11:07 | 4:22:12 |
monitor_weight A starting point, not a diagnosis
This calculator gives you the same number a clinician would compute by hand from your inputs. It is informational, never a substitute for a doctor. If a result surprises you, write it down and discuss it at your next appointment — that conversation is the goal, not a verdict from a webpage.
science Built from peer-reviewed formulas
Every health calculator on CalcaTools uses an equation from the WHO, NIH, ACOG, CDC, or a published peer-reviewed paper. The exact citation is in the "Formula & methodology" section. We re-check sources quarterly and update the page when guidance changes — the "Last reviewed" date is at the top.
volunteer_activism Designed for real people
Health calculations only help if you can actually use them. We use plain-English labels (no jargon), accept both metric and US units, and show what a "normal" range looks like alongside your result — so you understand what the number means, not just what it is.
lock Private by design
Your weight, height, age, pregnancy details, and any other health input never leave your browser. Calculations run client-side; nothing is logged or stored on our side. We don't want your medical data — we just want the formula to work for you.
Interpretation guide
Pace concepts:
| Term | Meaning |
|---|---|
| Pace | Time to cover one mile or km |
| Speed | Distance per hour (mph or km/h) |
| Splits | Time for each segment of a race |
| Even / negative split | Same or faster second half |
Formula & methodology
Formula: Pace = Time / Distance; Speed = Distance / Time; Finish time = Pace x Distance
Pace is simply elapsed time divided by distance, expressed as minutes per mile or kilometer. The calculator converts freely among pace, speed, finish time, and distance so you can plan race goals or training runs. Enter any two values to solve for the third — for example a target marathon time to find the pace you need to hold.