Miles per Hour to Knots Converter
Instantly convert Miles per Hour (mph) to Knots (kn). Used in aviation and sailing when converting US mph wind speeds or vessel speeds to nautical knots.
Quick Reference
How to Convert Miles per Hour to Knots
To convert Miles per Hour to Knots, use this formula:
knots = mph × 0.868976
Example: Converting 100 mph to Knots gives you 86.898 knots. Just enter your own value in the converter above for an instant result.
Miles per Hour to Knots Conversion Table
Common Miles per Hour to Knots values at a glance — use this as a quick lookup reference:
| Miles per Hour (mph) | Knots (kn) |
|---|---|
| 5 mph | 4.3449 kn |
| 10 mph | 8.6898 kn |
| 20 mph | 17.3795 kn |
| 30 mph | 26.0693 kn |
| 45 mph | 39.1039 kn |
| 60 mph | 52.1386 kn |
| 74 mph | 64.3042 kn |
| 100 mph | 86.8976 kn |
| 120 mph | 104.28 kn |
| 150 mph | 130.35 kn |
| 200 mph | 173.8 kn |
When to Use Miles per Hour to Knots Conversion
Used in aviation and sailing when converting US mph wind speeds or vessel speeds to nautical knots. Here are the most common scenarios where you will need this conversion:
About Miles per Hour and Knots
One mile per hour equals approximately 0.869 knots. US weather forecasts use mph for wind speed, but aviation and maritime operations use knots. A 100 mph hurricane-force wind is about 87 knots. American sailors and pilots regularly convert between these units — a boat sailing at 10 mph is doing about 8.7 knots, which sounds slower but is the same speed. The Federal Aviation Administration uses knots for airspeed while US media reports wind speeds in mph, requiring constant conversion during storm coverage.
Related Speed Conversions
All Miles per Hour to Knots Values
Click any specific value below for a dedicated conversion page with formula, table, and nearby values: