Free Online Pace Calculator
Calculate your running pace per kilometre or mile, your finish time for any distance, or your estimated distance from a given pace and time. Our accurate free online pace calculator supports both US Imperial units and UK/EU Metric units to help you monitor cardio intensity and meet aerobic guidelines set by the WHO, CDC, and NHS.
Pace & Speed Results
Finish Time Results
Estimated Distance
Free Online Pace Calculator – Monitor Your Running Speed & Fitness
Pace is the time it takes to cover one unit of distance (e.g., one kilometre or one mile). It is expressed as minutes and seconds per unit (MM:SS). Speed is the inverse — how many units you cover per hour (km/h or mph). Whether you are training for a 5K, 10K, half-marathon, or full marathon, using our accurate free online pace calculator helps you log your achievements in both US Imperial units and UK/EU Metric units.
Under physical activity standards recommended by the World Health Organization (WHO), the NHS, and the CDC, adults should aim for 150 to 300 minutes of moderate-intensity or 75 to 150 minutes of vigorous-intensity aerobic exercise weekly. Tracking your running speed and pacing is a highly effective way to measure your training intensity, ensuring your workouts align with these global health guidelines.
Once you have the pace in seconds per km, convert it to MM:SS format by dividing by 60 to get whole minutes, and taking the remainder as seconds. For example, 325 seconds per km = 5 minutes 25 seconds per km (5:25/km).
How to Use the Pace Calculator
- Select your calculation mode using the three buttons at the top: Calculate Pace, Calculate Finish Time, or Calculate Distance.
- Calculate Pace — Enter the distance you ran (and its unit: km or miles) and your total elapsed time in H:MM:SS format. Click Calculate to see your pace per km, pace per mile, speed in km/h, and speed in mph.
- Calculate Finish Time — Enter a target distance and your target pace (MM:SS per unit). The calculator will show your predicted finish time plus intermediate splits for 5K, 10K, and half marathon if the target distance is long enough.
- Calculate Distance — Enter your total run time and your average pace per km. The calculator will estimate the distance covered in both kilometres and miles.
- Click Clear to reset all fields and start over.
Common Race Pace Reference Table
The table below shows world record, amateur competitive, and beginner paces for four major running distances to help you gauge your training pace.
| Race | Distance | World Record Pace | Amateur Competitive | Beginner / Finish |
|---|---|---|---|---|
| 5K | 5 km | 2:36 /km | 4:30–5:30 /km | 6:00–8:00 /km |
| 10K | 10 km | 2:41 /km | 4:45–5:45 /km | 6:30–8:30 /km |
| Half Marathon | 21.1 km | 2:51 /km | 5:00–6:00 /km | 7:00–9:00 /km |
| Marathon | 42.2 km | 2:53 /km | 5:15–6:30 /km | 7:30–10:00 /km |
World records as of 2024. Amateur paces are estimates for recreational runners completing races competitively.
Frequently Asked Questions
What is a good running pace for beginners under health guidelines?
For beginner runners, a good pace is typically between 6:00 and 8:00 minutes per kilometer (9:30 to 13:00 minutes per mile). Regional health authorities like the NHS emphasize focusing on endurance and heart rate zone consistency rather than absolute speed. Over time, as aerobic capacity develops, your natural running pace will increase while keeping your cardiovascular strain at safe levels.
How do I switch between US Imperial units and UK/EU Metric units on this pace calculator?
Our free online pace calculator allows you to toggle measurement units on the fly. Simply select "km" for UK/EU Metric units or "miles" for US Imperial units in the dropdown next to the distance field. The calculator will automatically adjust the output fields to show pace per kilometer, pace per mile, speed in km/h, and speed in mph simultaneously.
How does tracking running pace help meet WHO and CDC aerobic guidelines?
The WHO and CDC recommend adults achieve 75–150 minutes of vigorous aerobic exercise weekly. Running is classified as vigorous activity when it significantly increases your heart rate. By using our accurate calculator to track your pace, you can ensure you maintain a target speed that keeps you in the vigorous heart rate zone, maximizing cardiovascular health benefits.
Can this pace calculator predict marathon finish times accurately?
Our calculator computes finish times based on a constant average pace. In actual races, factors like fatigue, elevation profile, weather, and hydration affect speed. While it provides an excellent theoretical baseline, runners training under CDC-aligned metabolic preparation should use progressive pacing strategies to avoid hit-the-wall effects during a full marathon.