QCSunny Lab

Speed Converter

Convert speed between meters per second, kilometers per hour, miles per hour, knots and feet per second — the units used in physics, road signs, aviation and weather reports.

All conversions are exact: 1 m/s = 3.6 km/h, 1 mph = 1.609344 km/h, and 1 knot (nautical mile per hour) = 1.852 km/h exactly.

Frequently asked questions

How fast is 100 km/h in mph?

About 62.14 mph, since 1 mph = 1.609344 km/h.

Why do ships and planes use knots?

A knot is one nautical mile per hour, which ties speed directly to latitude-based distance on charts.

What is 1 m/s in km/h?

Exactly 3.6 km/h — a useful mental shortcut for physics problems.

中文说明

在米/秒、千米/小时、英里/小时、节(海里/小时)与英尺/秒之间换算——分别覆盖物理、道路交通、航空与气象领域的常用单位。

所有换算均为精确值:1 米/秒 = 3.6 千米/小时,1 英里/小时 = 1.609344 千米/小时,1 节 = 1.852 千米/小时(精确)。

常见问题

100 千米/小时是多少英里/小时?

约 62.14 mph,因为 1 英里/小时 = 1.609344 千米/小时。

为什么船只和飞机用"节"?

1 节 = 1 海里/小时,把速度与航海图上基于纬度的距离直接对应起来。

1 米/秒等于多少千米/小时?

精确等于 3.6 千米/小时,这是物理题中常用的心算捷径。