Looking to convert speed to pace or work out your marathon time? Our free calculator lets you instantly convert your running data and plan your goals with precision.
Whether you're training for a 5K, a 10K, a half marathon or a marathon, our tool helps you find the pace to hold to reach your goals. Use the 4 calculation modes to get everything you need for your training.
Pace
Calculator
Convert speed and pace, calculate your times, plan your goals. 100% free ⚡
Your pace
Times across distances
How to use the pace calculator?
🎯 "Race Goal" mode
Got a target time over a specific distance? This mode automatically calculates the pace to hold to hit your goal. For example, to finish a marathon in 4 hours, you'll need to hold a pace of 5:41 min/km.
📏 "Distance + Time" mode
Just finished a run and want to know your average pace? Simply enter the distance covered and the time you clocked. The calculator works out your pace and shows your equivalents across the classic distances.
⚡ "Speed ↔ Pace" conversion mode
Easily convert between km/h and min/km. This two-way conversion is essential for adjusting your training depending on whether your watch shows speed or pace.
📊 "Full Chart" mode
Generate a custom chart built around your current pace. See your projected times across every distance at a glance, with pace variations to plan your different training zones (easy runs, threshold, intervals).
💡 Tip: Use the "Share" button to save your calculations via the URL, or download a PDF of your chart so you always have it on hand during your runs!
Frequently asked questions
How do you convert speed to pace in running?
To convert a speed (km/h) into a pace (min/km), use the formula: Pace = 60 / Speed. For example, 12 km/h = 60/12 = 5 min/km. Our calculator runs this conversion instantly in both directions.
How do I calculate my pace if I ran 10 km in 50 minutes?
To calculate your pace, divide the total time by the distance: 50 min / 10 km = 5 min/km. Use the 'Distance + Time' mode of our calculator to automatically get your pace and your equivalents over other distances.
What pace do I need to finish a marathon in 4 hours?
For a marathon in 4 hours (240 minutes), the target pace is: 240 min / 42.2 km = 5:41 min/km (around 10.55 km/h). Our 'Race Goal' mode automatically calculates the pace you need based on your target time.
What is the difference between speed and pace?
Speed measures the distance covered in one hour (km/h), while pace indicates the time needed to cover one kilometre (min/km). Pace is more intuitive in running because it lets you manage your effort kilometre by kilometre.
How do I use the pace chart for my training?
The pace chart lets you plan your sessions: base endurance runs are done at 70-75% of your max pace, threshold work at 85-90%, and intervals at 95-105%. Our calculator generates a custom chart with your training zones.
Can I share or download my simulation results?
Yes! Our calculator lets you share your results via a unique URL link (the parameters are included in the URL) or download a PDF with your custom chart of paces and times over different distances.
Want to learn more?
Discover our complete guide to running pace, with expert advice and training strategies.
📖 Read the full guide
