Pace Calculator
Calculate running pace, finish time, or distance.
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How This Pace Calculator Works
This calculator uses established scientific formulas validated in peer-reviewed literature. All calculations run locally in your browser — no data is sent to any server.
Common Race Distances
| Race | Distance | Beginner Pace | Intermediate | Advanced |
|---|---|---|---|---|
| 5K | 3.1 miles | 12:00/mi | 9:00/mi | 6:30/mi |
| 10K | 6.2 miles | 12:30/mi | 9:30/mi | 7:00/mi |
| Half Marathon | 13.1 miles | 13:00/mi | 10:00/mi | 7:30/mi |
| Marathon | 26.2 miles | 13:30/mi | 10:30/mi | 8:00/mi |
Training by Pace Zone
Do 80% of training at easy pace (conversational) and 20% at tempo or interval pace. Use heart rate zones to calibrate effort. Track calorie burn with Calories Burned. Fuel with adequate calories, protein for recovery, and water for hydration.
Understanding Pace Zones
Elite running coaches structure training around five pace zones, each serving a distinct physiological purpose. Easy pace (60-70% effort) builds aerobic base and should comprise 80% of your weekly mileage. Tempo pace (75-85% effort) trains your lactate threshold — the intensity above which fatigue accumulates rapidly. Interval pace (90-95% effort) develops VO2max, your body's maximum oxygen processing capacity. Repetition pace (95-100% effort) improves neuromuscular coordination and running economy. Race pace varies by distance — roughly tempo for a marathon, interval for a 5K.
Use the Target Heart Rate Calculator to correlate your pace zones with heart rate zones. Easy pace typically corresponds to Zone 2 (60-70% max HR), tempo to Zone 3-4 (70-85% max HR), and intervals to Zone 4-5 (85-95% max HR).
Fueling for Your Pace
Running at different paces burns different amounts of energy per mile. Faster paces burn more calories per minute but fewer per mile (because you cover the distance faster). At easy pace, your body primarily burns fat for fuel. At tempo and above, you shift toward glycogen (stored carbohydrates), which is why carbohydrate intake matters more for higher-intensity training. Use the Calories Burned Calculator to estimate your energy expenditure. Set daily targets with the Calorie Calculator and ensure adequate hydration — dehydration of just 2% body weight reduces running performance by 10-20%.
Post-run nutrition should include protein within 30-60 minutes to support muscle repair. A 3:1 or 4:1 carb-to-protein ratio is optimal for glycogen replenishment — calculate your split with the Macro Calculator.
Frequently Asked Questions
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