CalKit

Speed Converter

Convert between km/h, m/s, mph, knots and more.

kmh
킬로미터/시 (km/h) → 마일/시 (mph)
62.1372mph

모든 단위 변환

미터/초 (m/s)27.7778
킬로미터/시 (km/h)100.000
마일/시 (mph)62.1372
노트 (knot)53.9958
피트/초 (ft/s)91.1345

Overview

Convert between kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), knots, and more. Covers automotive, aviation, maritime, and general speed conversions.

Formula

1 km/h = 0.621371 mph
1 mph = 1.60934 km/h
1 m/s = 3.6 km/h = 2.23694 mph
1 knot = 1.852 km/h = 1.15078 mph
1 ft/s = 0.3048 m/s = 1.09728 km/h

How to Use

  1. 1Enter the speed value to convert.
  2. 2Select the source unit (km/h, mph, m/s, etc.).
  3. 3Select the target unit.
  4. 4View the converted result.

Tips

  • ✔A highway speed limit of 110 km/h is about 68 mph.
  • ✔The marathon world record pace is about 21 km/h (5.83 m/s).
  • ✔Knots are the standard speed unit in aviation and maritime navigation.
  • ✔Mach 1 (speed of sound) is approximately 343 m/s or 1235 km/h at standard atmospheric conditions.

FAQ

Q. How do I quickly convert km/h to mph?

Multiply km/h by 0.621 to get mph, or roughly multiply by 0.6 for a quick estimate. For example, 100 km/h ≈ 62 mph.

Q. What is a knot?

A knot is one nautical mile per hour, equal to approximately 1.852 km/h or 1.151 mph. It is the international standard speed unit for aviation and maritime use.

Q. What is a Mach number?

The Mach number is the ratio of an object's speed to the speed of sound. Mach 1 is approximately 343 m/s (1235 km/h) at standard atmospheric conditions.

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