🚀Speed Converter

公式

Result = (value × from-factor) ÷ to-factor, relative to m/s

Every speed unit has a fixed conversion factor to metres per second: 1 km/h = 1 ÷ 3.6 m/s (≈ 0.277778 m/s), 1 mph = 0.44704 m/s and 1 knot = 0.514444 m/s. The calculator converts your value to m/s first and then to the target unit.

ステップ解説

1. 1Enter the speed you want to convert.
2. 2Choose the unit to convert from and to: km/h, mph, m/s or knots.
3. 3Read the exact result instantly.

計算例

Reference table

よくある間違い

• ✗Confusing knots (nautical miles per hour) with mph (statute miles per hour); a knot is slightly faster than one mph.
• ✗Forgetting to divide km/h by 3.6 when converting to m/s (a common physics-class mistake).
• ✗Mixing up wind speed and vehicle speed: weather reports often give wind in knots or Beaufort, not km/h.

活用シーン

• ✓Converting a US speed limit (mph) to km/h for a road trip.
• ✓Converting wind speed from a marine forecast (knots) into km/h.
• ✓Comparing a running or cycling pace in m/s with the speed shown on a traffic sign.

よくある質問