Convert mph to knots
1 mph = 0.868976 kn · 1 kn = 1.15078 mph · Exact by definition
1 mph = 0.868976 kn
The same value in other units
- metre per second
- 0.44704 m/s
- kilometre per hour
- 1.60934 km/h
- minutes per kilometre
- 37.2823 min/km
Settings
Digits kept in the answer. Automatic keeps six, which hides floating-point noise without losing anything real.
Convert a whole list
Paste one conversion per line, written the way you would say it: "5 km to mi". Handy for a column copied out of a spreadsheet.
Speed and pace
mph to knots: conversion table
| mile per hour | knot |
|---|---|
| 1 mph | 0.868976 kn |
| 2 mph | 1.73795 kn |
| 3 mph | 2.60693 kn |
| 5 mph | 4.34488 kn |
| 10 mph | 8.68976 kn |
| 20 mph | 17.3795 kn |
| 25 mph | 21.7244 kn |
| 50 mph | 43.4488 kn |
| 100 mph | 86.8976 kn |
| 250 mph | 217.244 kn |
| 500 mph | 434.488 kn |
| 1000 mph | 868.976 kn |
| knot | mile per hour |
|---|---|
| 1 kn | 1.15078 mph |
| 2 kn | 2.30156 mph |
| 3 kn | 3.45234 mph |
| 5 kn | 5.7539 mph |
| 10 kn | 11.5078 mph |
| 20 kn | 23.0156 mph |
| 25 kn | 28.7695 mph |
| 50 kn | 57.539 mph |
| 100 kn | 115.078 mph |
| 250 kn | 287.695 mph |
| 500 kn | 575.39 mph |
| 1000 kn | 1150.78 mph |
How the conversion works
kn = mph × 0.86897624
Both units are defined exactly, so the precision of the mph to knots result depends only on the number of decimal places you choose.
METHOD AND SOURCES
Where the conversion factors come from
Results are calculated from the unit definitions stored in the converter, not copied from a lookup table. For exact units, every value in the table follows from the same factor shown in the formula above.
- BIPM — SI Brochure
The official definitions of the International System of Units (SI).
- NIST SP 811 — Conversion factors
Conversion-factor tables for SI and non-SI units.
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