Use this distance calculator to find how far you ran based on your time and pace, or to figure out the distance you need to cover to hit a goal finish.
Enter any two values, choose miles or kilometers, and get an instant result you can use for race planning, workouts, and tracking progress.
FAQs on distance calculator
How do I use the run distance calculator to find my distance?
Pick miles or kilometers, then enter your time and pace. The calculator returns your distance in both miles and km. Example: 30:00 at 9:40 per mile is about 3.1 miles (5K).
What’s the difference between the pace, distance, and time tabs?
They all use the same three pieces of information: pace, time, and distance. The Distance tab finds distance from pace plus time. The Pace tab finds pace from distance plus time, and the Time tab finds time from distance plus pace.
What pace should I enter, per mile or per kilometer?
Use the unit that matches how you train and what your watch shows. If you train in miles, enter pace per mile. If you train in kilometers, enter pace per km.
Why does the distance look wrong when I switch miles and kilometers?
Most “wrong” results come from mixing units. If you switch to kilometers, also switch your pace to per km, not per mile. A quick check: 6:00 per km is about 9:39 per mile.
Can this calculator estimate my finish time for common race distances?
Yes. Once you enter time and pace, it can show predicted finish times for popular distances like 5K, 10K, half marathon, and marathon. Treat it as a pacing reference, not a promise.
How do I use the splits section, and what does “negative splits 3%” mean?
Enter a distance and a total time to generate split times by mile or kilometer. “Negative splits 3%” means each split is planned to be about 3% faster than the one before. Use it to practice starting controlled and finishing stronger.
Why doesn’t the calculator match my GPS watch or treadmill?
Watches can drift from GPS signal, tight turns, or tall buildings, and treadmills can be miscalibrated. Your watch also smooths pace differently than a calculator. If the gap is big, compare over a longer run and use the average pace.
Is it smart to base a goal pace on this if I’m new or returning from injury?
Use it as a starting point, then adjust after a few easy runs. If you feel sharp pain, chest pain, faintness, or unusual shortness of breath, stop and get medical help. For training, build gradually and keep most runs at a talkable effort.
I completed my first 10K on a dare. In a year, I ran a half-marathon. Another year later, I finished a marathon race. Today I run 4 marathons a year and a half-marathon every week. I learned everything about running the hard way. So, I help runners achieve better results easier.