MPH to Knots Converter
Convert mph to knots instantly. Enter a speed in miles per hour to get knots by dividing by 1.15078, with the reverse knots to mph direction shown.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the MPH to Knots Converter Works
This tool converts miles per hour (mph) to knots (kn) and back. Miles per hour is the everyday land-speed unit, while knots, equal to nautical miles per hour, are standard in boating, aviation and weather forecasting.
The Formula
Knots = mph ÷ 1.15078 MPH = knots × 1.15078
Equivalently, multiply mph by 0.86898 to get knots. A knot is faster than a mph because a nautical mile is longer than a statute mile.
Worked Example
Convert 60 mph (highway speed) to knots:
- knots = 60 ÷ 1.15078 = 52.14 knots
A gentler speed of 15 mph:
- 15 ÷ 1.15078 = 13.03 knots
Going the other way, 25 knots in mph:
- mph = 25 × 1.15078 = 28.77 mph
MPH to Knots Quick Reference
| MPH | Knots |
|---|---|
| 10 | 8.69 |
| 25 | 21.72 |
| 40 | 34.76 |
| 60 | 52.14 |
| 100 | 86.90 |
Where You Use This Conversion
Converting mph to knots is useful whenever a land-based speed needs to be expressed for the sea or sky, such as comparing a car or wind speed to a boat or aircraft speed. Pilots, sailors and meteorologists all work in knots, so translating a familiar mph figure helps bridge land and nautical contexts.
Frequently asked questions
How many knots is 1 mph?+
One mile per hour equals about 0.86898 knots. So 60 mph is about 52 knots. To convert mph to knots, divide by 1.15078.
How do I convert mph to knots?+
Divide the mph value by 1.15078, or multiply by 0.86898. For example, 60 mph ÷ 1.15078 = 52.14 knots. To reverse it, multiply knots by 1.15078.
What is 60 mph in knots?+
60 mph equals about 52.1 knots. A car at highway speed would be moving at roughly 52 knots if measured in nautical terms.
Why is a knot faster than a mph?+
A knot is one nautical mile per hour, and a nautical mile (1.852 km) is longer than a statute mile (1.609 km). So a single knot covers more distance per hour than one mph, making it faster.
When would I convert mph to knots?+
Useful when a wind or vehicle speed is given in mph but you need it for sailing, flying or marine navigation, where knots are the standard. Pilots and boaters routinely work in knots.