Pace Calculator
Calculate running or walking pace
This free online pace calculator provides instant results with no signup required. All calculations run directly in your browser — your data is never sent to a server. Enter your values below and see results update in real time as you type. Perfect for everyday calculations, homework, or professional use.
Distance
13.11 mi
Time
2:00:00
Pace / mi
9:09
Splits Table
| mi | Split | Cumulative |
|---|---|---|
| 1 | 9:09 | 9:09 |
| 2 | 9:09 | 18:18 |
| 3 | 9:09 | 27:28 |
| 4 | 9:09 | 36:37 |
| 5 | 9:09 | 45:46 |
| 6 | 9:09 | 54:55 |
| 7 | 9:09 | 1:04:05 |
| 8 | 9:09 | 1:13:14 |
| 9 | 9:09 | 1:22:23 |
| 10 | 9:09 | 1:31:32 |
| 11 | 9:09 | 1:40:41 |
| 12 | 9:09 | 1:49:51 |
| 13 | 9:09 | 1:58:60 |
| 13.11 | 1:00 | 1:59:60 |
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Pace Calculator. Most fields include unit selectors so you can work in your preferred unit system — metric or imperial, whichever matches your problem.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors and can produce results that are off by factors of 2, 10, or more.
Read the results
The Pace Calculator instantly computes the output and displays results with units clearly labeled. All calculations happen in your browser — no loading time and no data sent to a server.
Explore parameter sensitivity
Try adjusting individual input values to see how the output changes. This is a quick and effective way to develop intuition about how different parameters influence the result and to identify which inputs have the largest effect.
Formula Reference
Pace Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above. Input fields accept values in multiple unit systems — select your preferred unit from the dropdown next to each field.
When to Use This Calculator
- •Use the Pace Calculator for personal health tracking and wellness monitoring, establishing a baseline and tracking changes over time.
- •Use it when recording fitness metrics to track progress toward health or athletic goals.
- •Use it to compare measurements before and after a lifestyle, diet, or training change to quantify the impact.
- •Use it as a conversation starter before a doctor's appointment, bringing objective data to discuss with a healthcare professional.
About This Calculator
The Pace Calculator is a free health and wellness calculation tool designed for personal use and general informational purposes. Calculate running or walking pace This calculator provides reference values based on established health screening formulas and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Results may vary based on individual factors not captured by the calculation. Consult a qualified healthcare provider for personalized health guidance. All calculations are performed locally in your browser — no personal health data is transmitted or stored.
The Theory Behind It
Running and walking pace is expressed as the time required to cover a unit distance — minutes per mile or minutes per kilometer — rather than the distance covered in a unit of time (speed in mph or km/h). The two representations are mathematical inverses: pace (min/mi) = 60 / speed (mph), and pace (min/km) = 60 / speed (km/h). Runners and walkers prefer pace because the units match how they think about training sessions ('I'll hold 8-minute miles for 6 miles'), match race-event terminology (marathon split times, mile-repeat targets), and make it easy to project finish times by multiplying pace × distance. The calculator converts between pace, distance, and time in both metric and imperial units. It is most useful for race planning (compute finish time from goal pace and race distance), training sessions (convert interval targets between min/mi and min/km), and comparing efforts between different-length races. A common use is race-pace prediction: given a runner's recent race time at one distance, estimate their pace for a target distance using pace-scaling rules like the Riegel formula, T2 = T1 × (D2/D1)^1.06, which accounts for the fact that sustainable pace slows as race distance increases. The 1.06 exponent is an empirical constant fitted to large data sets of recreational and competitive runners; elite runners show slightly lower exponents around 1.04–1.05, and ultrarunners show exponents closer to 1.08. Pace also varies with terrain (elevation gain adds about 30–45 s/mi per 100 ft of climb for trained runners), temperature (heat adds 2–5% to sustainable pace), and fatigue across a race (positive vs negative split strategy).
Real-World Applications
- •Race-day pacing: compute the even-split pace required to hit a target finish time (e.g., 'sub-4-hour marathon' = 9:09 per mile or 5:41 per kilometer). Use the calculated pace as a wristwatch alarm during the race to prevent going out too fast in the first few miles.
- •Training prescription: convert between pace, speed, and heart-rate zones when a coach assigns interval workouts. A typical tempo run prescription is '5K pace +10 s/mi for 20 minutes,' which requires a pace calculator to translate into a concrete split target.
- •Metric ↔ imperial conversion: convert between min/km and min/mi when comparing your training paces with runners or training logs in different regions. Strava, Garmin Connect, and most race results let you pick units; the calculator handles the math when you need to cross-reference.
- •Treadmill calibration: most US treadmills show speed in mph, but runners think in pace. Compute the equivalent mph for a goal pace (e.g., 7:30 min/mi = 8.0 mph) so you can set the treadmill correctly at the start of a workout.
- •Finish-time projection: given your mile or 5K split, project your marathon or half-marathon finish time using linear pace estimation (for well-trained even pacing) or adjust with the Riegel formula for less-trained runners who slow as distance increases.
Frequently Asked Questions
How do I convert between min/mile and min/km?
Multiply min/mile by 0.6214 to get min/km, or multiply min/km by 1.6093 to get min/mile. For example, an 8:00 min/mile pace = 8.00 × 0.6214 = 4.97 min/km ≈ 4:58 per kilometer. This calculator handles the unit conversion automatically — enter pace in whichever units you prefer and it converts to the other. Both units are mathematically inverted speeds, so a faster runner has a LOWER pace number (and a higher speed).
What is a good running pace for a beginner?
A comfortable conversational jog for most beginners falls between 10:00–13:00 min/mi (6:13–8:05 min/km), depending on fitness, body composition, and experience. The key metric for beginner runners is not absolute pace but the 'talk test' — if you can speak in full sentences, you are running at an aerobic effort that builds fitness without excessive stress. Beginners who focus on building weekly mileage at an easy pace typically see their natural pace drop by 30–90 seconds per mile over the first 3 months of consistent training.
How does pace relate to speed?
Pace and speed are mathematical inverses. Speed (mph) = 60 / pace (min/mi), and speed (km/h) = 60 / pace (min/km). An 8:00 min/mile runner is running at 60/8 = 7.5 mph. A 5:00 min/km runner is at 60/5 = 12 km/h. Pace becomes intuitive to runners once they memorize a few landmarks: 10 min/mi = 6 mph, 8 min/mi = 7.5 mph, 6 min/mi = 10 mph. The calculator handles both representations so you can work in whichever unit matches your context.
Why does marathon pace feel so much harder than 5K pace?
Sustainable pace decreases with race distance because the body's fuel systems shift from anaerobic glycolysis (fast, short-duration) to aerobic fat oxidation (slower, longer-duration). A recreational runner's 5K pace might be 30–60 seconds per mile faster than their marathon pace. The Riegel formula T2 = T1 × (D2/D1)^1.06 captures this empirically. The 1.06 exponent means doubling the race distance adds about 6% to the pace — doubling again adds another 6%, compounding over the race. Well-trained marathoners show smaller exponents (less slowdown) because aerobic capacity improves with long-run training.
Does this calculator account for elevation gain?
No — the pace calculator assumes flat-terrain pacing. Hilly courses effectively add distance to your race: a common rule of thumb is that every 100 feet of elevation gain adds 20–40 seconds per mile for well-trained runners, and more for novices. For races with significant elevation change, compute your flat-terrain pace with this calculator, then adjust based on your own climb experience or using a hill-adjustment formula like the Minetti energy-cost model. Trail runners use Naismith's rule (add 1 hour per 2,000 ft of ascent) as a first approximation.