Runners are trained to think in pace — minutes per kilometre or minutes per mile — while almost every other sport defaults to plain speed. They're not different things, just two ways of expressing the same number. Once you can convert between them in your head, a live speed reading becomes a genuinely useful training tool, not just a curiosity.
The math: converting pace to speed
Pace is time per unit distance; speed is distance per unit time. They're reciprocals of each other, scaled by 60. To convert a pace in minutes per kilometre into km/h: divide 60 by your pace. A 5:00 min/km pace becomes 60 ÷ 5 = 12 km/h. A 4:00 min/km pace becomes 60 ÷ 4 = 15 km/h. The same formula works for miles: a pace of 8:00 min/mile is 60 ÷ 8 = 7.5 mph.
Going the other way is just as simple: divide 60 by your speed to get pace in minutes per unit distance. At 10 km/h, that's 60 ÷ 10 = 6:00 min/km.
Why a live speed number can be more useful mid-run
Pace, as most watches display it, is usually a rolling average over the last several seconds or the most recent split — by design, smoothed so it doesn't jump around. That's great for judging your overall race rhythm, but it's slower to react if you want to know, right now, exactly how hard you're pushing in this specific moment, for example during a short interval or a hill repeat. A live speed readout, like the gauge on this site's running speed checker, updates continuously and gives you that instant feedback without doing the pace-to-effort translation in your head mid-stride.
Typical speeds for common running efforts
To put some numbers on it: an easy conversational jog usually sits around 8 to 10 km/h (5:00–7:30 min/km). A comfortable 5K race pace for a recreational runner is often 10 to 12 km/h. Marathon pace for a sub-4-hour finisher works out to roughly 10.5 km/h, while elite marathon pace is closer to 20 km/h. Sprinting, even briefly, can push well past 25 km/h. Seeing where your own live number falls against these benchmarks gives you an instant sense of effort level without waiting for a split to update.
One number, two purposes
Neither pace nor speed is "more correct" — they're suited to different moments. Pace is the better long-term planning tool: it maps directly onto race splits and finish-time goals. Speed is the better real-time feedback tool: it updates instantly and translates intuitively to "how hard am I going right now." Many runners benefit from glancing at both: pace for the plan, speed for the moment-to-moment execution.
The takeaway
Pace and speed are the same measurement told two different ways, connected by a simple 60-divided-by formula in either direction. If you train by pace but want a more immediate, real-time read on your effort, the GPS-based running speed checker on this site gives you that number continuously, with no math required.