Quick Answer
5 m/s is exactly 18 km/h
How to Calculate
- Start with the value: 5 meters per second
- Apply the formula: km/h = m/s × 3.6
- Calculate: 5 → 18
- Result: 5 m/s = 18 km/h
To convert meters per second to kilometers per hour, multiply the m/s value by 3.6.
Reference Table
| Meters per Second (m/s) | Kilometers per Hour (km/h) |
|---|---|
| 0.1 | 0.36 |
| 0.25 | 0.9 |
| 0.5 | 1.8 |
| 1 | 3.6 |
| 2 | 7.2 |
| 3 | 10.8 |
| 5 | 18 |
| 10 | 36 |
| 20 | 72 |
| 50 | 180 |
| 100 | 360 |
When You Need This Conversion
Driving
Speed limits are posted in mph (US/UK) or km/h (most other countries). Converting helps when driving abroad.
Running & cycling
Athletic pace is tracked in either miles or kilometers per hour. Converting helps compare performance data.
Wind speed
Weather reports use different speed units. Knots are used in aviation and sailing, while km/h or mph are used on land.
Frequently Asked Questions
How many kilometers per hour is 5 meters per second?
5 meters per second equals 18 kilometers per hour. This is calculated using the formula: km/h = m/s × 3.6.
What is the formula for converting meters per second to kilometers per hour?
To convert meters per second to kilometers per hour, multiply the m/s value by 3.6.
Is 5 meters per second exactly 18 kilometers per hour?
Yes, 5 meters per second is exactly 18 kilometers per hour.
How many km/h are in 1 m/s?
One meter per second equals exactly 3.6 kilometers per hour.
What is the speed of sound in km/h?
The speed of sound (343 m/s at sea level) equals approximately 1235 km/h.
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Last verified: March 2026. All conversion factors are based on internationally defined standards.