How many knots are in 1 mile per hour?

1 mile per hour equals 0.868976 kn.

How do I convert knots back to miles per hour?

Use the reverse converter: 1 knot equals 1.15078 mph.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert miles per hour to knots, multiply the value by 0.868976242.

kn = mph × 0.868976242

140 mph × 0.868976242 = 121.66 kn

Mile Per Hour (mph): Used for road speed limits in the US and UK. Exactly 0.44704 metres per second.
Knot (kn): One nautical mile per hour, used in sailing, aviation and weather reports.

How do I convert miles per hour to knots?: To convert miles per hour to knots, multiply the value by 0.868976242.
How many knots are in 1 mile per hour?: 1 mile per hour equals 0.868976 kn.
How many knots are in 10 miles per hour?: 10 mph equals 8.68976 kn.
How do I convert knots back to miles per hour?: Use the reverse converter: 1 knot equals 1.15078 mph.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.