Numbers
On-device · No upload
Running Pace Calculator
Calculate your running pace, finish time, or distance covered — with pace per km and per mile, average speed, a race time predictor, and a full splits table. Free, private, and instant.
Running Pace Calculator computes running pace per kilometer and per mile plus average speed from distance and time, calculates total finish time from distance and pace, or calculates distance covered from time and pace. Includes a race time predictor for 5K, 10K, Half Marathon, and Marathon distances, and a per-kilometer or per-mile splits table. Calculations run entirely in your browser — no uploads, no signup. Built by FreeToolHub.
Pace Calculator
100% client-side. Your data stays in your browser.
Distance & Time
Distance Unit
Time
Distance & Pace
Distance Unit
Pace
Pace Unit
Time & Pace
Time
Pace
Pace Unit
Race Time Predictor
Predicted finish times at your current pace.
| Race | Distance | Predicted Time |
|---|
Splits
Cumulative split times for your distance.
| Mark | Split | Cumulative Time |
|---|
How Pace Is Calculated
Formula
Pace = Time ÷ Distance. Speed = Distance ÷ Time.
Unit Conversion
1 mile = 1.609344 kilometers. Pace per mile = Pace per kilometer × 1.609344.
All calculations run entirely in your browser. Nothing you enter is sent to a server.
Frequently Asked Questions
What is running pace?
Running pace is the amount of time it takes to cover one unit of distance, usually expressed as minutes and seconds per kilometer or per mile (for example, 5:00/km). It is the inverse of speed: a lower pace number means you are running faster.
How do I convert pace between kilometers and miles?
Multiply your pace per kilometer by 1.609344 to get your pace per mile, or divide your pace per mile by 1.609344 to get your pace per kilometer, since one mile equals 1.609344 kilometers. This calculator does the conversion automatically and shows both.
What is a good running pace for beginners?
Most new runners comfortably run somewhere between 6:00 and 8:00 per kilometer (about 9:40 to 12:50 per mile). Pace varies widely by fitness level, terrain, and goals, so the most useful pace is one you can hold consistently for your target distance.
What is the difference between pace and speed?
Pace measures time per unit of distance (minutes per kilometer or mile), while speed measures distance per unit of time (kilometers or miles per hour). They describe the same effort from two directions — this calculator shows both.
How accurate are the race time predictions?
The race time predictor multiplies your current pace by standard race distances (5K, 10K, Half Marathon, Marathon), assuming you hold that exact pace for the full distance. Real race performance varies with pacing strategy, fatigue over longer distances, terrain, and conditions, so treat these as a starting estimate, not a guarantee.
Does this tool store my data?
No. All calculations run entirely in your browser using JavaScript. Nothing you enter is sent to a server, logged, or stored.