Race Calculator
The ultimate race planning tool. Calculate pace, predict finish time, generate predictions from past results, and create mile-by-mile splits. Everything in one place.
Calculate Pace
Enter distance and time to find your pace
Your Pace
--:--min/mi
Race Distance Comparison
Not sure which race distance is right for you? This table compares the four most popular road race distances by average finish time, training commitment, and difficulty level. Choose a distance that matches your current fitness and available training time.
Race Day Planning Checklist
For a more detailed checklist, see our personalized race day checklist tool.
Turn Every Training Run Into a Strategy Game
You have calculated your pace, predicted your time, and planned your splits. Now take that fitness out for something bigger. Motera tracks every run while you capture territory on a real map, climb leaderboards, and explore new streets through Fog of War.
Your daily training runs become conquests. Every mile earns XP. Every loop claims land.
MoteraFrequently Asked Questions
What is a race calculator?
A race calculator is a tool that helps runners plan for race day by computing pace, finish time, predictions, and splits. Instead of using separate tools for each calculation, a race calculator combines them into one place. Enter your distance and time to find pace, or distance and pace to find time, or a past result to predict a new distance, or a target time to generate mile-by-mile splits.
How do I calculate my race pace?
Divide your total race time (in seconds) by the distance (in miles or kilometers). For example, a 1:45:00 half marathon is 6,300 seconds divided by 13.1 miles, which equals 481 seconds per mile, or about 8:01 per mile. This calculator does the conversion automatically when you enter distance and time in the Pace tab.
What is a good pace for a beginner race?
For a first 5K, anything between 10:00 and 14:00 per mile is common. For a first half marathon, 10:00 to 13:00 per mile is typical. For a first marathon, 10:30 to 14:00 per mile covers most finishers. The most important thing for your first race is to finish comfortably. You can always set a time goal for your second attempt.
How do I use splits to pace my race?
Splits break your race into individual mile (or kilometer) segments with cumulative times. Print your splits or write them on your arm before the race. Check each mile marker against your split sheet to know if you are on target. For the best results, aim for even splits or slightly negative splits (second half faster than first half).
How accurate are race predictions from shorter distances?
Predictions from a similar distance (2x to 4x ratio) are typically accurate within 1 to 3 percent. Predicting a 10K from a 5K is more reliable than predicting a marathon from a 5K. The formulas assume equal training for both distances. If you have not trained specifically for the longer distance, the prediction will be optimistic.
Should I run even splits or negative splits?
Negative splits (second half faster) are generally the best strategy. Start 5 to 10 seconds per mile slower than your goal pace for the first couple of miles. Settle into target pace in the middle. Pick up the pace in the final 20 to 30 percent if you feel good. This approach prevents the common mistake of starting too fast and fading badly in the final miles.
What is the difference between this and a pace calculator?
A pace calculator typically does one thing: converts between distance, time, and pace. This race calculator does that plus predictions from past results and mile-by-mile split generation. It is a more complete race planning tool with everything you need in one place.
How many weeks of training do I need for each race distance?
General guidelines: 5K requires 6 to 8 weeks of consistent running. 10K requires 8 to 10 weeks. Half marathon requires 10 to 14 weeks. Marathon requires 16 to 20 weeks. These assume a base fitness of at least 15 to 20 miles per week. Starting from zero adds additional weeks to build up safely.
