40 MPH to KPH Converter
Convert between miles per hour (mph) and kilometers per hour (kph) with this interactive tool
mph
kph
40 mph
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Conversion Result
40 mph = 64.37 kph
Formula: kph = mph × 1.6093
Compare 40 mph with common speed references:
| Speed Reference | MPH | KPH | Comparison to 40 MPH |
|---|---|---|---|
| Average walking speed | 3.1 | 5 | 12.9 times slower |
| Typical city speed limit | 31.1 | 50 | 1.3 times slower |
| Highway speed limit (US) | 74.6 | 120 | 1.9 times faster |
| 40 MPH | 40 | 64.4 | – |
| Commercial airplane cruising | 559.2 | 900 | 14 times faster |
| Speed of sound | 767.3 | 1235 | 19.2 times faster |
Visual representation of 40 mph compared to other speeds:
Speed is the rate at which an object moves in a specific direction. The two most common units for measuring speed are:
- Miles per hour (mph): Primarily used in the United States and the United Kingdom.
- Kilometers per hour (kph): Used in most countries worldwide that follow the metric system.
The conversion between these units is based on the relationship between miles and kilometers:
1 mile = 1.60934 kilometers
Therefore:
- To convert mph to kph: kph = mph × 1.6093
- To convert kph to mph: mph = kph × 0.6214
40 mph is a moderate speed, typically represented by:
- Urban driving and city traffic conditions
- Speed limits in small towns and residential areas
- Recreational cycling on a flat road
Common speed conversions around 40 mph:
| MPH | KPH | Context |
|---|---|---|
| 35 | 56.3 | Typical speed limit in urban areas |
| 40 | 64.4 | Suburban speed limit |
| 45 | 72.4 | Countryside roads |
| 50 | 80.5 | Country highways |
| 60 | 96.6 | Interstate highway entry speed |
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