Pace Calculator
Pace, speed and split times from your distance and finish time.
Formula
About this calculator
A pace calculator turns your distance and finish time into the number runners live by: pace, expressed as minutes per mile or per kilometer. Whether you are training for a first 5K or chasing a marathon personal best, knowing your pace lets you plan workouts, judge effort and predict finish times with confidence.
The math is simple division — pace is total time divided by distance, and speed is distance divided by time — but doing it in your head mid-run is not. This tool handles the hours-minutes-seconds conversions for you and also reports your speed in miles or kilometers per hour for treadmill work.
The split table is where a pace calculator earns its keep. By applying a steady pace to standard race distances — 1K or mile markers, 5K, 10K, half marathon and full marathon — it shows the cumulative time you would hit at each checkpoint. Race-day pacing is largely about hitting those splits evenly, since going out too fast is the classic mistake that leads to fading in the final miles.
Remember that these splits assume a perfectly even pace on flat ground. Real races involve hills, wind, heat and fatigue, so use the numbers as targets to train toward rather than guarantees. Many runners plan a slightly negative split — running the second half marginally faster than the first — which the even-pace baseline here makes easy to visualise.
Frequently asked questions
How do I calculate my running pace?
Divide your total time by the distance you covered. This calculator does it instantly and converts the result into minutes per mile or kilometer.
What pace do I need for a sub-4-hour marathon?
Roughly 9:09 per mile or 5:41 per kilometer. Enter 26.2 miles (or 42.195 km) and a 4:00:00 time to confirm and see every split.
What is a negative split?
Running the second half of a race slightly faster than the first. The even-pace splits here give you a baseline to plan one around.
Does it work for miles and kilometers?
Yes. Choose your distance unit and the pace, speed and splits — including half and full marathon markers — adjust accordingly.