UtilityBaseCalculators
Running Pace Calculator
Pace per mile/km, speed, and race finish times from any distance and time.
Updated July 8, 2026
How to use the running pace calculator
- 1Enter a distance (or tap a race preset) and your time — mm:ss or hh:mm:ss.
- 2Read pace in both min/mile and min/km, plus mph for the treadmill.
- 3Check the projected finishes at that pace across standard races.
- 4For goal-setting, enter the target time at the race distance to get your required pace.
Common uses
- Working out what pace a goal race time actually requires
- Converting between min/mile and min/km for international training plans
- Setting the right treadmill speed for a target pace
- Projecting a realistic half-marathon ceiling from recent 10K results
Frequently asked questions
How do I read pace vs speed?
Pace is time per distance (8:30 per mile) — how runners think. Speed is distance per time (7.1 mph) — how treadmills think. They're reciprocals; the calculator shows both plus the metric versions so you never do the conversion mid-run.
Are the race projections realistic?
They assume you hold today's pace forever, which physiology disputes — endurance costs roughly 6% more time per doubling of distance (Riegel's rule). Treat the 5K projection from a 5K as exact, the marathon projection from a 5K as a best-case ceiling.
What's a respectable pace for a newer runner?
Sustainable beats fast: many recreational runners live between 9 and 12 minutes per mile, and finishing a first 5K anywhere under 35 minutes is solid. The pace that lets you hold a conversation is the one building your aerobic base.
How should I use this for race pacing?
Work backwards: enter your goal time at the race distance and read the required pace — that's the number for your watch. Then check whether recent training runs at shorter distances support it; a goal pace you've never touched in training is a plan to blow up at mile 18.
About this tool
The running pace calculator turns any distance and time into everything a runner wants to know: pace per mile and per kilometer simultaneously, speed in mph and km/h (the treadmill number), and projected finish times at that exact pace for the 5K, 10K, half marathon, and marathon. Race-distance presets fill the field in one tap. It's honest about the projection caveat — holding pace across doubling distances flatters you, so the marathon figure is labeled a ceiling, not a promise. Time parsing accepts both mm:ss and hh:mm:ss, because a 5K and a marathon shouldn't need different tools.
Like most tools on UtilityBase, the running pace calculator runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more calculators here.
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