Speed Unit Conversion Tool
Whether you're driving a car, navigating a ship, analyzing physics experiments, watching sports events, or planning travel routes, converting between speed units is a common requirement in both everyday and professional contexts. However, the relationships among metric units (e.g., m/s, km/h), imperial units (e.g., ft/s), and nautical-specific units (knots) are complex and prone to error.
To solve this problem, we present a professional Speed Unit Conversion Tool that supports instant, high-precision conversion among the following 5 internationally used speed units:
- Meters per second (m/s) — the SI standard
- Kilometers per hour (km/h) — used globally for road speed limits and vehicle dashboards
- Meters per hour (m/h) — for extremely slow speeds (e.g., geological movement, precision instruments)
- Knot (knot) — the standard in maritime and aviation (1 knot = 1 nautical mile per hour)
- Feet per second (ft/s) — commonly used in U.S. engineering and physics calculations
Simply enter a value, select the source and target units, and get an accurate result instantly!
🔁 Core Speed Conversion Formulas
Reference Values (in meters per second)
| Unit | Equivalent in m/s |
|---|---|
| 1 m/s | 1 |
| 1 km/h | ≈ 0.277778 m/s |
| 1 m/h | ≈ 0.000277778 m/s |
| 1 knot | = 0.514444 m/s |
| 1 ft/s | ≈ 0.3048 m/s |
Key Definitions
- 1 knot = 1 nautical mile per hour, and 1 nautical mile = 1,852 meters (international standard)
- 1 foot (ft) = 0.3048 meters (exact)
Common Conversion Formulas
| Conversion Direction | Formula |
|---|---|
| m/s → km/h | km/h = m/s × 3.6 |
| km/h → m/s | m/s = km/h ÷ 3.6 |
| m/s → knot | knot = m/s ÷ 0.514444 |
| knot → km/h | km/h = knot × 1.852 |
| ft/s → m/s | m/s = ft/s × 0.3048 |
| m/h → m/s | m/s = m/h ÷ 3,600 |
| km/h → ft/s | ft/s = km/h × 0.911344 |
🚗 Common Speed Unit Reference Table
| m/s | km/h | m/h | knot | ft/s |
|---|---|---|---|---|
| 0.2778 | 1 | 1,000 | 0.540 | 0.911 |
| 1 | 3.6 | 3,600 | 1.944 | 3.281 |
| 5 | 18 | 18,000 | 9.719 | 16.404 |
| 10 | 36 | 36,000 | 19.438 | 32.808 |
| 20 | 72 | 72,000 | 38.877 | 65.617 |
| 27.78 | 100 | 100,000 | 54.0 | 91.134 |
| 51.44 | 185.2 | 185,200 | 100 | 168.781 |
✅ Key Reference Points
- 100 km/h ≈ typical highway driving speed
- 100 knots ≈ cruising speed of a medium-sized vessel or small aircraft
- 1 m/s ≈ normal walking speed (≈ 3.6 km/h)
✨ Tool Highlights
- Full coverage of 5 speed units: meets needs across land, sea, air, and scientific applications
- High-precision conversions: based on international standards (1 nautical mile = 1,852 m; 1 ft = 0.3048 m)
- Real-time calculation: results appear instantly—supports decimals and scientific notation
- Completely free · No ads · No registration required
- Responsive design: works perfectly on smartphones, tablets, and desktop computers
🌐 Try It Now!
💨 Make speed conversion simple, intuitive, and error-free!
Whether you're driving, sailing, flying, studying physics, or analyzing data—this tool is your ideal assistant.
🏁 Give it a try today—master speed through precise conversion!