Conversion kilometers per hour to miles per hour, km/h to mph.

The conversion factor is 0.621371192; therefore, 1 kilometer per hour = 0.621371192 miles per hour. In other words, to convert a value in km/h to mph, divide by the value by 1.6093440006147. The calculator answers the questions such as: How many mph is 40 km/h? or How to convert km/h to mph. This is a speed unit conversion from km/h to mph.

Conversion result:

1 km/h = 0.62137 mph

1 kilometer per hour is 0.62137 miles per hour.

Enter speed

km/h

Choose other speed units


Converting kilometers per hour (km/h) to miles per hour (mph) is a common unit conversion, especially when comparing speeds in countries that use the metric system (km/h) versus the imperial system (mph). Here is how to do it:

Key Conversion Factor:

1. 1 kilometer per hour (km/h) ≈ 0.621371 miles per hour (mph). - This means:
$1\text{km/h}=0.621371\text{mph}$

---

Conversion Formula:

To convert kilometers per hour to miles per hour, multiply the speed in km/h by 0.621371:
$\text{Speed in mph}=\text{Speed in km/h}\times 0.621371$

---

Example Conversion:

If a car is traveling at 100 km/h, the speed in mph is:
$100\text{km/h}\times 0.621371=62.1371\text{mph}$

---

Key Points:

1. 1 km/h ≈ 0.621371 mph: This is the exact conversion factor.
2. 1 mph ≈ 1.60934 km/h: This is the inverse conversion factor.
3. Applications: This conversion is commonly used in travel, automotive speed limits, and athletic performance metrics.

---

Quick Reference:

- 50 km/h ≈ 31.07 mph
- 80 km/h ≈ 49.71 mph
- 100 km/h ≈ 62.14 mph
- 120 km/h ≈ 74.56 mph

---

Notes:

- For quick mental calculations, you can approximate $1\text{km/h}\approx 0.6\text{mph}$. For example:
$100\text{km/h}\times 0.6=60\text{mph}$
This approximation is close enough for everyday use.

Conversion of a velocity unit in word math problems and questions

• The bicycle
  The bicycle runs 30 mph for 20 minutes. How far it goes?
• A train
  A train can travel 1136 miles in 4 hours. What is the unit rate at which this train travels per hour? Write in miles per hour.
• A race
  A race car driver won a 500-mile race with a speed of 116.3 miles per hour. Find the driver's time.
• A truck 4
  A truck covers a particular distance in 3 hours with a speed of 60 miles per hour. If the speed is increased by 30 miles per hour, find the time the truck takes to cover the same distance in hours.

• Noel drives
  Noel drives at an average speed of 52 miles per hour (mi/h) for 3 1/4 hours. How far has he traveled for 3 1/4 hours?

more math problems »