Knots to MPH Converter
1 knot ≈ 1.15077944802 miles per hour.
Conversion result
MPH = knots × 1852 ÷ 1609.344; knots = MPH × 1609.344 ÷ 1852.
Primary source: NIST SP 811, Appendix B.8 conversion factors. Exact underlying definitions are used before display rounding. NIST international foot definition confirms 0.3048 meter exactly. NIST SP 811 footnotes supplies the international nautical mile definition.
Worked example: 10 knots × 1852 ÷ 1609.344 ≈ 11.5077944802 mph; 20 knots ≈ 23.0155889605 mph.
Common conversion values
The table follows the selected direction. Results display up to 12 significant digits.
| knots | international miles per hour |
|---|---|
| 1 | 1.15077944802 |
| 5 | 5.75389724012 |
| 10 | 11.5077944802 |
| 20 | 23.0155889605 |
| 50 | 57.5389724012 |
A knot is one international nautical mile per hour. The nautical mile is exactly 1852 meters; the international land mile is exactly 1609.344 meters. Results are arithmetic speed conversions and do not account for wind, currents or travel conditions.
How to use this tool
Enter a quantity in knots, choose the forward or reverse direction, and select Convert. Decimals, fractions such as 1/2, and mixed fractions such as 1 1/2 are supported.
Frequently asked questions
What factor does this converter use?
1 knot ≈ 1.15077944802 miles per hour. MPH = knots × 1852 ÷ 1609.344; knots = MPH × 1609.344 ÷ 1852.
Can I reverse the conversion or use fractions?
Yes. Choose the reverse direction on this page. Enter nonnegative decimals, fractions or mixed fractions. Quantities and fraction components are limited to 10¹²; denominators must be positive. Decimal inputs permit up to 24 digits and effective exponents ±24.
Is this converter free and private?
Yes. Calculations run on your device, with no uploads, sign-up or browser storage.