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Pace Conversion
Tool Description
Pace Conversion is an online running pace conversion tool with daily free quota — no installation, no registration, ready to use. It supports bidirectional conversion between pace (min/km, min/mile) and speed (km/h, m/s, mph), while also calculating per-400m/per-100m split times and estimated finish times for half and full marathon. Enter any pace and unit to instantly view all corresponding results. All calculations run entirely in your browser, 100% privacy protected. Whether youre planning training, pacing for a race, or converting treadmill speed, its easy to handle — start using it free with results comparable to professional running software.
How to Use
- Enter Pace
Input the minutes and seconds of your pace in the two input fields. For example, for a 5:30 pace, enter
5and30 - Select Unit
Choose the pace unit from the dropdown — per km (min/km) or per mile (min/mi)
- View Results
Click the "Convert" button or press Enter, and the result area below will display pace, speed, split times, and marathon finish time estimates. Each result has a copy button for convenience.
Use Cases
- Running Training: When planning interval or tempo runs, quickly calculate target pace corresponding speed and split times, such as 400m interval target time
- Marathon Preparation: Calculate the required pace from a target finish time, or estimate full/half marathon finish time from your current pace to plan race strategy
- Treadmill Conversion: Treadmills typically display speed in km/h or mph. Convert your familiar pace (min/km) to treadmill speed for convenient indoor training
Key Advantages
- Daily Free Quota
Free usage is provided every day, so daily pace queries and training planning cost nothing. Use all conversion features without paying
- Privacy & Security
All conversions run entirely in your browser. Your input data is never uploaded to any server, keeping your running data and privacy fully protected
- One-Input Overview
Enter your pace once to view 9 results at once, including pace, speed, split times, and marathon finish times — no repeated conversions needed
- Bidirectional Conversion
Supports bidirectional conversion between pace and speed (km/h, m/s, mph), handling both treadmill and road running data flexibly
- Ready to Use
No installation, no registration — open the page and start. Works on mobile, tablet, and desktop, so you can check your pace anywhere
- Easy Copy
Each result has a copy button — click to copy the value and paste it into training notes or social media
Pace and Speed Conversion Formulas
The following are the core conversion formulas between pace and speed, using per-kilometer pace (min/km) as the base:
| Conversion Item | Formula | Example (Pace 5:30/km) |
|---|---|---|
| Pace → Speed (km/h) | Speed = 60 ÷ Pace (minutes) | 60 ÷ 5.5 ≈ 10.91 km/h |
| Pace → Speed (m/s) | Speed = 1000 ÷ Pace (seconds) | 1000 ÷ 330 ≈ 3.03 m/s |
| Pace /km → Pace /mile | Pace/mi = Pace/km × 1.609344 | 5:30 × 1.609 ≈ 8:51/mi |
| Pace → Per 400m Time | 400m Time = Pace (seconds) × 0.4 | 330 × 0.4 = 132s = 2:12 |
Common Pace and Marathon Finish Time Reference
The following table shows estimated half marathon and full marathon finish times at different paces, for runner reference:
| Pace (/km) | Half Marathon | Full Marathon | Level Reference |
|---|---|---|---|
| 4:00/km | 1:24:24 | 2:48:47 | Elite Runner |
| 5:00/km | 1:45:29 | 3:30:58 | Advanced Runner |
| 6:00/km | 2:06:35 | 4:13:10 | Recreational Runner |
| 7:00/km | 2:27:41 | 4:55:22 | Beginner Runner |
FAQ
Pace is the time it takes a runner to complete 1 kilometer (or 1 mile), typically expressed as "min:sec per km" (min/km) or "min:sec per mile" (min/mi). For example, a pace of 5:30/km means it takes 5 minutes and 30 seconds to run each kilometer. A faster pace (smaller value) means you run faster. Pace is one of the most important metrics in marathon and long-distance running training — runners manage energy distribution and race rhythm by controlling their pace.
Pace /mile = Pace /km × 1.609344, since 1 mile ≈ 1.609344 km. For example, 5:00/km ≈ 8:03/mi. Conversely, Pace /km = Pace /mile ÷ 1.609344. When reading overseas running articles or using foreign running apps, you'll often encounter pace in min/mi. Use this tool to quickly convert to your familiar min/km.
Pace (seconds/km) = Target Finish Time (seconds) ÷ 42.195. For example, if your goal is 4 hours (14,400 seconds), the required pace = 14,400 ÷ 42.195 ≈ 341.3 sec/km = 5:41/km. Common target references: 3-hour marathon requires 4:16/km, 3.5 hours requires 4:59/km, 4 hours requires 5:41/km, 5 hours requires 7:07/km. This tool supports reverse calculation: enter a target pace to see the estimated finish time.
Pace (min/km) = 60 ÷ Speed (km/h). For example, treadmill set to 10 km/h, pace = 60 ÷ 10 = 6:00/km; set to 12 km/h, pace = 60 ÷ 12 = 5:00/km. Common treadmill speed references: 8 km/h ≈ 7:30/km, 10 km/h ≈ 6:00/km, 12 km/h ≈ 5:00/km, 14 km/h ≈ 4:17/km. This tool automatically calculates km/h speed when you enter your pace, making it easy to set your treadmill.
Finish Time = Pace (seconds/km) × Race Distance (km). The standard half marathon distance is 21.0975 km, and the standard full marathon distance is 42.195 km. The calculation assumes the runner maintains a constant pace throughout. In actual races, factors like fatigue, elevation changes, and weather may cause slowdowns in the second half. The times shown are ideal estimates for training and race strategy reference. It's recommended to allow a 5-10% buffer for actual race day conditions.
No. All conversion calculations run entirely in your browser using pure JavaScript math. Your input data never leaves your device.
Get 9 results with one input. Includes pace per km (min/km), pace per mile (min/mi), speed (km/h, m/s, mph), per-400m time, per-100m time, plus estimated half marathon and full marathon finish times. It covers most data needs for running training and racing.
Free usage is provided every day, so daily use costs nothing. We prepare a daily free quota for every user, which is enough for basic pace conversion and training queries; if you need more frequent or professional use, a membership unlocks more benefits.
Results are precisely calculated based on international standard distances. The conversion formulas strictly follow standards such as 1 mile = 1.609344 km, half marathon 21.0975 km, and full marathon 42.195 km. Times are displayed to the second, reliable for training plans and race reference.
Yes. The page uses a responsive design and works normally in mobile, tablet, and desktop browsers. On mobile, just enter minutes and seconds, select a unit, and tap Convert to see all results. The copy feature is supported too.
Pace is the time to cover a fixed distance, while speed is the distance covered per unit of time. A pace of 5:30/km equals about 10.91 km/h. Running training and marathons commonly use pace, while treadmills commonly use speed. This tool freely converts between the two.
Click the copy icon on the right side of the result box. Each unit result has a copy button. Click it to copy the value to your clipboard and paste it into training notes, spreadsheets, or social media without manually selecting text.
Content last updated：2026-07-16
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