Choose whether you want to calculate pace, total time, or distance, then enter the two known values (e.g., distance and time to get pace). The calculator instantly shows your result, along with your speed in km/h and mph, and a splits table for common race distances.
Free pace calculator – no sign‑up
Calculate Your Running Pace in Seconds
Instantly find your pace per mile or kilometer from your finish time. Convert between pace, speed, and distance — plan your training and race strategy with confidence. All free, private, and instant.
Plan Your Run with Pinpoint Accuracy
Whether you’re training for a 5K or a marathon, pace is the key to achieving your goal. Our Pace Calculator takes any distance and finish time, instantly showing you the exact pace per mile or kilometer, your speed in mph or km/h, and split times. You can also work backwards: enter your target pace and distance to find out your finish time, or see how far you can go at a given pace. It’s the simplest way to dial in your training and race strategy — all free and private.
What Is a Pace Calculator?
A pace calculator is a free online tool that helps runners, walkers, and cyclists determine their pace — the average time it takes to cover a certain distance. You enter your total time and distance (in miles or kilometers), and the tool computes pace per mile, per kilometer, and even per 400 meters or other common splits. It can also convert pace to speed (mph or km/h) and vice versa. Many pace calculators also let you solve for time (given pace and distance) or distance (given pace and time). It’s a must‑have for anyone training with a goal time in mind, or for anyone curious about their fitness level.
How to Use the Pace Calculator
Choose Your Unit System
Select miles or kilometers. The calculator automatically adapts the pace and speed results.
Enter Distance & Time
Provide the distance you ran (or plan to run) and the total time in hours, minutes, and seconds.
View Your Pace, Speed & Splits
Instantly see your pace per mile or km, speed, and common split times. Use reverse mode to find the required time for a target pace — no sign‑up needed.
How the Pace Calculator Performs the Math
The calculator converts your time to total minutes (or seconds), then divides by the distance to get pace per unit. For example, if you run 6.2 miles in 50 minutes, your pace is 50 ÷ 6.2 ≈ 8.06 minutes per mile, which is 8 minutes and 4 seconds per mile. To find speed, it divides the distance by the time in hours: 6.2 miles ÷ (50/60 hours) = 7.44 mph. The reverse calculations solve for time (pace × distance) or distance (time ÷ pace). All computations run in your browser; your workout data stays private.
Core Pace Formula
Pace = Time ÷ Distance
Speed = Distance ÷ Time
Time in minutes, distance in miles or km. Results are displayed in minutes per unit and speed in mph or km/h.
Key Features of This Pace Calculator
Dual Unit Support
Switch between miles and kilometers — pace and speed update automatically for your preferred measurement.
Instant Split Times
See your time for intermediate distances — 400m, 800m, 1 mile, 5K, and more — all from a single input.
Solve for Time or Distance
Need to find your finish time for a target pace? Or how far you’ll go in a given time? The calculator handles all three scenarios.
Private & Secure
Your workout times stay on your device. Nothing is ever uploaded or shared.
Benefits of Using a Pace Calculator
- ✅ Set realistic race goals – know the pace you need to hold to achieve your target finish time
- ✅ Improve training quality – accurately hit tempo, interval, and long‑run paces
- ✅ Track progress – compare your pace over time to see fitness improvements
- ✅ Plan fueling and hydration – know how long you’ll be on the course
- ✅ Prevent burnout – start at the right pace and avoid going out too fast
Pace Per Mile vs. Pace Per Kilometer
Miles
Used primarily in the U.S. and UK. Pace is expressed in minutes and seconds per mile. A 9:00/mi pace means each mile takes 9 minutes.
Kilometers
Standard in most of the world. Pace per km is slightly faster numerically. A 5:00/km pace equals about 8:03/mi.
Conversion
The calculator handles both instantly. There are 1.609 kilometers in a mile, so pace per km = pace per mile ÷ 1.609.
Pace vs. Speed: What’s the Difference?
Pace tells you how long it takes to cover a fixed distance (minutes per mile), while speed tells you how far you travel in a fixed time (miles per hour). A 10:00/mi pace equals 6.0 mph; an 8:00/mi pace equals 7.5 mph. The relationship is inverse: Speed (mph) = 60 ÷ Pace (minutes per mile). The calculator displays both so you can communicate with cyclists, treadmill users, and runners alike.
Using Splits to Pace Your Race
Even Splits
Running the same pace for every mile or kilometer. Most efficient for achieving a personal best.
Negative Splits
Running the second half faster than the first. A strategy for experienced runners to finish strong.
Example Pace Calculation
You complete a 10K (6.2 miles) in 55 minutes. Your pace per mile = 55 ÷ 6.2 ≈ 8.87 minutes, which is 8 minutes and 52 seconds per mile. Your speed = 6.2 ÷ (55/60) ≈ 6.76 mph. If you wanted to finish in 50 minutes instead, you’d need a pace of about 8:04 per mile. The calculator instantly shows both the current pace and the target pace needed.
Common Race Distances and Typical Paces
For reference, a 5K at a 9:00/mi pace takes about 28 minutes. A half marathon at that pace takes about 1:57. A marathon at the same pace is 3:55. The calculator lets you plug in any distance and instantly see the required pace to hit your goal. Use it to set training paces for tempo runs, long runs, and speed workouts.
Factors That Affect Your Running Pace
- 🏃 Distance and terrain
- 🌡️ Weather conditions
- 👟 Footwear and gear
- 💧 Hydration and nutrition
- 🧬 Fitness level and training
- 🧠 Mental focus
- 📈 Course elevation
- 🏥 Injury or fatigue
Detailed Goal Time Scenario
Scenario: You want to run a half marathon (13.1 miles) in 1 hour 45 minutes.
- ✅ Target pace: 105 minutes ÷ 13.1 miles ≈ 8.02 min/mi (8:01/mi)
- ✅ Required speed: 13.1 ÷ 1.75 ≈ 7.49 mph
- ✅ 5K split at this pace: ~24:50
- ✅ 10K split: ~49:40
- ✅ Training should include runs at this pace to build muscle memory.
Who Can Use This Pace Calculator?
- 🏃 Runners of all levels – from Couch to 5K beginners to seasoned marathoners
- 🚴 Cyclists and triathletes – calculate speed and time for any distance
- 👩🏫 Coaches and trainers – plan workout splits and pacing strategies for athletes
- 🎓 PE students and educators – learn the relationship between time, distance, and speed
- 📋 Race directors – estimate finish times and cut‑off paces for events
Key Pace & Speed Terms
- Pace
- The average time taken to cover a unit of distance, usually expressed in minutes per mile (min/mi) or minutes per kilometer (min/km).
- Speed
- The rate of motion, typically miles per hour (mph) or kilometers per hour (km/h).
- Split
- The time to complete a specific segment of a race or workout; for example, a 5K split during a 10K run.
- Negative Split
- Running the second half of a race faster than the first half, often a sign of good pacing.
Tips for Improving Your Running Pace
- Include interval training (short bursts of speed) once a week to build cardiovascular power.
- Practice running at your goal pace during long runs to develop muscle memory.
- Strengthen your core and legs with resistance training to improve running economy.
- Monitor your heart rate and run easy on recovery days to avoid overtraining.
- Use this calculator regularly to track progress and adjust your training plan.
Advantages of This Pace Calculator
- ✅ 100% free – no sign‑up, no ads
- ✅ Instant pace, speed, and split calculations
- ✅ Supports miles and kilometers
- ✅ Solves for time, distance, or pace
- ✅ Works on any device
- ✅ Private – your workout data never leaves your device
Limitations of Pace Calculations
The calculator provides average pace over a flat, even surface. It does not account for elevation changes, wind, or stops. For trail runs or hilly courses, your actual pace may vary significantly. Use the results as a guideline and adjust based on course conditions.
Accuracy of Results
The formulas are exact. As long as your time and distance inputs are correct, the pace and speed will be accurate. Splits are derived mathematically and reflect even pacing.
Security and Privacy
All calculations are performed locally in your browser. No workout data or personal information is ever transmitted, stored, or shared. You can use the tool offline after the page loads.
Mobile‑Friendly Design
The pace calculator is fully responsive. Use it on your phone right after a run, on your tablet, or at your desk — all inputs and results adapt perfectly to any screen size.
Frequently Asked Questions
How do I calculate my running pace?
Divide your total time (in minutes) by the distance (in miles or kilometers). For example, a 30‑minute 5K gives a pace of 30 ÷ 3.1 ≈ 9.68 minutes per mile, or 9:41/mi. The calculator does this automatically.
Can I find my time from a target pace?
Yes. Enter your desired pace and distance, and the calculator will tell you the exact finish time you need to achieve.
What’s the difference between pace and speed?
Pace is how long it takes to go a certain distance (e.g., min/mi). Speed is how far you go in a certain time (e.g., mph). They’re inverses of each other.
Does the calculator handle half miles or other distances?
Yes, you can enter any decimal distance, like 2.5 miles or 7.3 kilometers, and the pace will be accurate.
Can I see my splits for different distances?
Absolutely. After calculating your pace, the tool displays estimated times for 400m, 800m, 1 mile, 5K, 10K, half marathon, and marathon based on that pace.
Is my personal data safe?
Yes. All calculations are done locally. No data is ever sent to a server or stored.
Related Running & Fitness Calculators
Conclusion: Run Smarter, Race Faster
Pacing is the secret weapon of every successful runner. With this calculator, you’ll always know the exact speed you need to hit your goals. Enter your numbers now and take control of your training.
Ready to Find Your Pace?
Enter your time and distance now – free, private, and instant.