🏠 Home🧮 Calculators✍️ Text Tools
🏃 Running Calculator

Running Pace Calculator

Calculate your running pace, speed and finish time for any race distance. 5K, 10K, half marathon, marathon — with per-km split table and pace zones.

Common race distances
Time (hours : minutes : seconds)
Hours
Minutes
Seconds
Your pace
min/km
km/h
min/mile
📋 Per-kilometre split times
SplitSplit timeElapsed
🏆 Finish times at this pace for common races
🏃 Pace zones — where do you run?

Running pace explained

Running pace is the time it takes to cover one unit of distance (min/km or min/mile). Speed is distance per time (km/h or mph). This calculator finds either — just enter the other two values.

⏱️ Common pace goals

5K: Sub-30min = 6:00/km, Sub-25min = 5:00/km. 10K: Sub-60min = 6:00/km, Sub-50min = 5:00/km. Half marathon: Sub-2hr = 5:41/km. Marathon: Sub-4hr = 5:41/km, Sub-3:30hr = 4:58/km.

🔋 Training zones

Easy (Z1-2): conversational pace, 70-80% of max HR. Tempo (Z3): comfortably hard, 80-87% max HR. Threshold (Z4): hard, 87-93% max HR. Interval (Z5): very hard, 93%+ max HR.

📈 Negative splits

Running the second half faster than the first. Elite marathoners use this strategy. It prevents going out too fast, conserves glycogen stores and results in faster overall times. Start 10-15 sec/km slower than goal pace.

🧮 Pace conversion

Speed (km/h) = 60 ÷ Pace (min/km). Pace (min/km) = 60 ÷ Speed (km/h). To convert min/km to min/mile: multiply by 1.609. To convert mph to km/h: multiply by 1.609.

Frequently asked questions

For beginners, 7–10 min/km (7–10 mph) is a normal starting pace. Being able to hold a conversation is a good benchmark — if you can't talk, slow down. Don't worry about pace initially; focus on time on feet. As fitness improves over 8–12 weeks, pace naturally improves.
Speed (km/h) = 60 ÷ Pace (min/km). Example: 6:00/km pace = 60 ÷ 6 = 10 km/h. Reverse: Pace (min/km) = 60 ÷ Speed (km/h). At 12 km/h, pace = 60 ÷ 12 = 5:00/km. This calculator shows both automatically.
1) Increase weekly mileage by no more than 10% per week. 2) Add one tempo run per week at uncomfortable-but-sustainable effort. 3) Do interval training — e.g. 6 × 400m at fast pace with recovery jogs. 4) Strength train legs 1-2× per week. 5) Sleep and recover — pace improves during rest, not during runs.
🔗 Related tools