Running Pace Calculator
Calculate your running pace, speed, and even-split times from any distance and finish time. Get pace per kilometre and per mile, plus Riegel race predictions for 5K, 10K, half marathon, and marathon , all for free.
What Is Running Pace?
Running pace is the time it takes you to cover a unit of distance , usually expressed in minutes and seconds per kilometre (min/km) or per mile (min/mi). It is simply total time divided by distance. A pace of 5:00 per km means you cover each kilometre in exactly five minutes.
Pace is the most portable training metric: a target pace tells you exactly how hard to run whether you are on a track, a treadmill, or a trail, and it is how race goals are set and split. Speed is the same information in reverse , a pace of 5:00 per km equals 12.0 km/h (about 7.5 mph).
How Does the Running Pace Calculator Work?
Enter any distance and finish time, and the calculator fills in the rest:
Pace (min/km or min/mi):
Pace = Total Time ÷ Distance
Speed (km/h or mph):
Speed (km/h) = 60 ÷ Pace (min/km)
Speed (mph) = Speed (km/h) ÷ 1.609344
Race time prediction (Riegel formula):
T₂ = T₁ × (D₂ ÷ D₁)1.06
The Riegel formula uses a fatigue exponent of 1.06, derived from pooled race-performance data across distances. It assumes you are equally well trained for both distances , so predictions for longer races (especially the marathon) are a fastest-case target that your training has to earn.
Why Use This Running Pace Calculator?
- Pace and speed together: See min/km, min/mi, km/h, and mph in one place.
- Even-split table: Know your exact elapsed time at every kilometre or mile , essential for race-day pacing.
- Race predictions: Get Riegel-equivalent times for 5K, 10K, half marathon, and marathon from a single effort.
- Unit flexibility: Enter distance in km or miles; get outputs in both systems.
- Visual overview: A chart shows your pace and speed at a glance.
- Free & Private: No registration, no data storage.
Understanding Your Pace Category
- Easy / recovery (> 7:00 min/km): Conversational effort, used for base building and recovery runs.
- Steady / aerobic (5:30 – 7:00 min/km): Comfortably hard, the foundation of most training plans.
- Tempo / threshold (4:30 – 5:30 min/km): “Comfortably hard” , the pace you can hold for about an hour.
- Interval / VO₂ max (3:30 – 4:30 min/km): Hard efforts used for speed development.
- Repetition / sprint (< 3:30 min/km): Very hard, short efforts for top-end speed.
Note: These bands are broad recreational guidelines. Your ideal training paces depend on your current fitness, goals, and race distance , use a race result or a dedicated training plan to set personalized zones.
Making Your Pace Faster
A pace calculator tells you where you are; raising your ceiling is what moves it. The two levers are a bigger aerobic engine and a higher fraction of it you can hold. Easy mileage in zone 2 builds the engine, hard intervals raise its size (e.g. 4-minute efforts at 90–95% of max heart rate raised VO₂ max 7.2% in eight weeks in a controlled trial), and tempo runs at threshold lift the pace you can sustain.
❓ Running Pace Calculator FAQ
How do I calculate running pace?
Pace is time divided by distance. Divide your finish time in seconds by the distance, then convert back to minutes and seconds. Example: 25 minutes for 5 km = 1500 seconds ÷ 5 = 300 seconds = 5:00 per kilometre.
What is a good 5K pace?
For recreational runners, 25–30 minutes (5:00–6:00 per kilometre) is a solid benchmark. Beginners often finish in 30–40 minutes; competitive club runners go under 20 minutes (about 4:00 per kilometre).
What is the difference between pace and speed?
They are inverses of each other. Pace is time per unit distance (e.g. 5:00 min/km); speed is distance per unit time (e.g. 12.0 km/h). A lower pace value means a faster speed, and a higher speed means a lower pace.
What is a split time?
A split is the time elapsed at a specific point in the race , for example, your time at the 5 km mark. An even-split table assumes you hold the same pace throughout, which is the reference every pacing plan starts from.
How accurate are the race time predictions?
The Riegel formula is well-calibrated for races up to the half marathon but tends to be optimistic for the marathon, especially for runners without adequate long-run base mileage. Treat predictions as a target that your training has to earn.
What is the Riegel formula?
Riegel's formula is T₂ = T₁ × (D₂ ÷ D₁)^1.06, where T is time and D is distance. The 1.06 exponent models how fatigue scales with distance. It was derived from pooled race results and is one of the most widely used race-time predictors.
Should I run even splits or negative splits?
Even splits are the reference point. Running the early kilometres a touch slower and the closing ones a touch faster (a negative split) usually lets you finish at or ahead of the even-pace time. Going out too hard is the single most common pacing mistake.
How do I convert pace between min/km and min/mi?
1 mile = 1.609344 km. To convert min/km to min/mi, multiply by 1.609344. To convert min/mi to min/km, divide by 1.609344. This calculator does the conversion automatically and shows both.
What pace should I train at for an easy run?
Easy runs should be conversational , you can talk in full sentences without gasping. For most recreational runners that falls roughly 60–90 seconds per kilometre slower than 5K race pace. A pace calculator gives you the race-pace anchor; adjust from there based on feel.
How often should I recalculate my paces?
Recalculate after every race or time trial, and every 4–8 weeks during a training block. As your fitness improves, your race-pace anchor shifts , and with it, your training paces.
Can I use this calculator for walking or cycling?
Yes , the pace/speed math is the same for any distance-based activity. Just enter your distance and time; the calculator will return pace and speed. The race predictions are running-specific, but the pace and split outputs are valid for walking, hiking, or cycling.
How do I convert measurements between metric and imperial?
This calculator automatically converts between kilometres and miles. Simply choose your distance unit (km or mi), and the calculator shows pace and speed in both systems.