This pace calculator works the way an actual training run works — give it any two of the three numbers that matter (pace, time, distance) and it solves the third instantly. Know your 10K time and want your pace per kilometer? Know your goal pace and want to predict your finish time for race day? Planning a run-walk session and want to know how long it’ll actually take? All three live in the same tool, switchable with a tap.
What this result tells you:
Pace is simply how much time it takes you to cover one kilometer — it’s the number that actually predicts your finish time, more reliably than speed in km/h, which is why every serious training plan is built around pace rather than overall speed. A pace result on its own isn’t good or bad; it only means something next to a goal. If you’re training with a calorie or energy target in mind for longer runs, our TDEE Calculator and Calorie Deficit Calculator are useful companions once you know how much distance you’re actually covering.
What is a pace calculator, and why not just use speed?
A pace calculator converts between three connected numbers: how far you went, how long it took, and how fast you were moving per kilometer. Runners talk in pace — minutes and seconds per kilometer — instead of speed in km/h, because pace maps directly onto how a race actually feels and how training plans are written. “Run at 5:30 pace” tells you exactly what effort to hold for the next kilometer marker. “Run at 10.9 km/h” technically means the same thing, but almost nobody thinks in those terms mid-run.
This calculator handles the conversion both ways, plus a specific mode for run-walk training, which uses slightly different math since you’re alternating between two paces rather than holding one steady effort.
How this calculator works
The pace calculator (3-way solver)
Pace, time, and distance are locked together by one relationship: time equals pace multiplied by distance. Since you always know two of the three going in, the calculator just rearranges that same equation depending on what you’re solving for:
Pace = Time ÷ Distance
Time = Pace × Distance
Distance = Time ÷ Pace
Pick which one you’re missing, fill in the other two, and the calculator does the division for you — no manual unit conversion between hours, minutes, and seconds required.
The run-walk calculator
Run-walk training — popularized by Olympian Jeff Galloway in the 1970s — alternates fixed running and walking intervals throughout a session instead of running continuously. It’s genuinely not just a beginner strategy: Galloway’s own research found runners using a planned run-walk ratio finished marathons faster on average than when they ran the same distance continuously, largely because the walk breaks are taken before fatigue sets in rather than after it forces a slowdown.
Since you’re covering ground at two different paces, this calculator simulates the session interval by interval — running distance at your run pace, walking distance at your walk pace, repeating until the target distance is reached — rather than using a single formula. That’s why it needs four separate inputs (run pace, run interval, walk pace, walk interval) instead of just one pace figure.
How to use this pace calculator
Solving for pace, time, or distance
Tap whichever one you want to find — your pace, your finish time, or your distance — and the calculator hides that field and asks for the other two instead. Pick a common race distance from the dropdown (5K, 10K, half marathon, marathon) or type in a custom number. Time is entered as hours, minutes, and seconds; pace is entered as minutes and seconds per kilometer. Your result also shows the equivalent pace per mile, in case that’s the unit you’re more used to seeing in an app like Strava.
Planning a run-walk session
Switch to the Run-Walk Calculator tab and fill in your running pace and how long you run before each walk break, then your walking pace and how long each walk break lasts. Add your target distance and the calculator works out your realistic total finish time and your blended average pace across the whole session — useful for knowing roughly when to expect to finish, or for comparing a few different ratios (4:1, 3:1, 2:1, 1:1) before deciding which one to train with.
What to do with your pace results
Use it to set a realistic race goal
Working backward from a goal finish time to a goal pace (and checking that pace against what you can currently hold in training) is a far more reliable way to set a race target than picking a finish time that sounds good. If your training runs are consistently landing at 6:30 pace, targeting a sub-6:00 marathon pace on race day is setting yourself up for a rough back half.
Use it to choose a run-walk ratio that matches your pace
Run-walk ratios generally track with pace: runners around 12-16 minute miles often use something close to 1:1 (equal run and walk time), while faster runners might use 4:1 or higher. There’s no single correct ratio — it’s worth testing a couple of options on a long training run and using this calculator to compare the projected finish times before settling on one for race day.
Use it to plan fueling and pacing on longer runs
Once you know roughly how long a long run or race will actually take, that number feeds directly into fueling and energy planning. Pair your estimated finish time here with our TDEE Calculator to get a sense of your overall daily energy needs on heavy training days.
Frequently asked questions
How do I calculate my running pace?
Divide your total time by your total distance. If you ran 5 kilometers in 30 minutes, your pace is 30 ÷ 5 = 6 minutes per kilometer. This calculator does that division automatically and also converts the result to pace per mile, so you don’t need to do the math by hand or convert units yourself.
What’s a good running pace for a beginner?
There’s no universal “good” pace — the honest answer is whatever pace lets you hold a conversation and finish the run feeling like you could do a bit more. Most new runners land somewhere between 7 and 10 minutes per kilometer, but fitness level, age, and running experience all shift that range significantly. Pace only becomes meaningful once you’re comparing it to your own past runs, not to a stranger’s.
How is this different from a pace calculator that shows speed in km/h?
Same underlying math, different unit. Runners generally think in pace (minutes per kilometer) rather than speed (kilometers per hour) because it maps more directly onto how training plans and race splits are written — “hold 5:30 pace” is easier to act on mid-run than “hold 10.9 km/h.” This calculator works entirely in pace for that reason.
Can I use this calculator for treadmill running?
Yes. The pace, time, and distance relationship works the same whether you’re on a road, a track, or a treadmill — enter whatever distance and time your treadmill display shows, or use the pace field directly if you already know your treadmill’s pace setting.
What run-walk ratio should I start with?
If you’re new to run-walk training, a 1:1 ratio (equal run and walk time, such as one minute of each) is a common, forgiving starting point recommended by Galloway-method coaches. As your fitness builds, the running portion typically gets longer relative to the walking portion — progressing toward ratios like 3:1 or 4:1. Try a ratio on a training run before committing to it for race day.
Does run-walk training actually make me slower?
Not necessarily, and for many runners it’s the opposite. Galloway’s own tracked data found runners using a planned run-walk ratio often finished marathons faster than when they attempted to run the same distance continuously, mainly because planned walk breaks taken early prevent the much bigger slowdown that comes from hitting a wall late in a race. The comparison that matters isn’t run-walk versus running — it’s planned walk breaks versus unplanned ones.
Why does the run-walk calculator need four inputs instead of one pace?
Because a run-walk session isn’t run at one steady pace — you’re covering some distance running and some distance walking, at two different speeds. The calculator has to work out how much ground each interval actually covers and add it all up, which needs your run pace and interval length plus your walk pace and interval length separately.
Related calculators
A couple of tools that pair naturally with your training numbers:
TDEE Calculator — Find your real daily calorie need once you know your training volume.
Calorie Deficit Calculator — Balance trdffaining output against a sustainable calorie deficit.
Age Calculator — A quick utility for tracking training age and race-day age category.