Select a mode: 1) Distance+Time→Pace: Know your distance and time? Calculate your pace. 2) Distance+Pace→Time: Plan your race with target pace. 3) Time+Pace→Distance: How far can you go at a given pace?
Enter data: Fill in the fields for your selected mode. Distance can be km, m, or miles. Time is entered as hours:minutes:seconds. Pace is minutes:seconds per unit.
Quick distance buttons: Use 5K, 10K, Half, Full buttons to instantly set common race distances.
View results: See your pace, total time, distance, and speed. A reference table shows times for common race distances at various speeds.
Sub-3 hours: ~4:15/km pace. Elite level. Requires extensive training and experience. Start conservatively at 4:20/km for the first 5K.
Sub-3:30: ~4:58/km pace. Advanced level. Maintain steady 5:00/km for the first half, adjust based on how you feel.
Sub-4 hours: ~5:40/km pace. Great goal for intermediate runners. Stay consistent and focus on nutrition.
Sub-4:30: ~6:23/km pace. Perfect for first-time marathoners. Start at 6:30/km and pick up if you feel good.
Sub-5 hours: ~7:06/km pace. Recreational finish goal. Focus on completing, walk breaks are fine!
Race pace planning: Before a race, calculate your target pace based on your goal finish time. Use this to set your watch and pace yourself during the race.
Post-run analysis: After your run, enter distance and time to see your actual pace and speed. Track your progress over time.
Training goals: Set realistic performance goals. If you run 5K in 25 minutes (5:00/km), estimate your potential half marathon time.
Interval training: Calculate target paces for interval sessions (400m repeats, mile repeats, etc.) to train at the right intensity.
Pace is the time it takes to cover a unit distance, expressed in minutes per km or minutes per mile. Lower pace = faster running.
Beginner: 7:00-8:00/km, average: 6:00-6:30/km, good: 5:00-5:30/km, excellent: 4:00-4:30/km. World record: ~2:50/km.
Increase mileage gradually, add interval training, do tempo runs, strengthen your core and legs, get adequate rest, and improve running form.
Speed (km/h) = 60 / pace (min/km). Example: 5 min/km = 12 km/h. This calculator does the conversion automatically.
No. Your half marathon pace is typically 5-10 sec/km faster than your full marathon pace. Full marathons require more conservative pacing due to glycogen depletion and fatigue in the later stages.