Knots to MPH
Knots to miles per hour: 1 kn = 1.1508 mph. Formula, a 12-row reference table, worked examples and the reverse conversion.
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Formula for converting knots into miles per hour
Between knots and miles per hour there is one constant ratio, 1.150779448. Type any amount of knots into the widget and it multiplies that amount by 1.150779448 to produce miles per hour.
Because the relationship is a plain ratio, doubling the knots doubles the miles per hour, and 0 kn stays 0 mph. The inverse ratio is 0.86897624, meaning 1 mph = 0.86897624 kn.
Knots and their value in miles per hour
This lookup list shows 12 kn values and what they become in mph. The step from one row to the next is not constant, but the ratio of 1.150779448 between the columns is.
| Knots (kn) | Miles per hour (mph) |
|---|---|
| 0.25 | 0.28769486 |
| 1 | 1.150779448 |
| 1.5 | 1.726169172 |
| 3 | 3.452338344 |
| 6 | 6.904676688 |
| 8 | 9.206235584 |
| 15 | 17.26169172 |
| 40 | 46.03117792 |
| 75 | 86.3084586 |
| 150 | 172.6169172 |
| 400 | 460.3117792 |
| 2,000 | 2,301.558896 |
These figures are generated, not typed in by hand, and follow the widget's rounding rules described in the questions further down.
Three sample conversions from knots to miles per hour
With 75 kn, the multiplication by 1.150779448 produces 86.3084586 mph once rounded the way the widget rounds.
Take 120 knots as the second case. The widget returns 138.0935338 miles per hour, and that figure divided by 1.150779448 returns to about 120.
Going the opposite way, 95 miles per hour comes to 82.55274298 knots using the inverse ratio 0.86897624.
Converting miles per hour back to knots
The mirror-image page is MPH to Knots, where 1 mph = 0.86897624 kn. Its table and examples use miles per hour as the starting unit.
The full Speed Converter lets you choose any two units from the same list, not only kn and mph.
Related conversions for knots and miles per hour
Other pairs that use the same unit table are listed here.
Frequently asked questions
What is 1 kn in mph?
The widget shows 1.150779448 miles per hour for each knot. Scaled up, that makes 11.50779448 mph for 10 kn.
How many kn make up 1 mph?
The widget shows 0.86897624 knots for each mile per hour. For 10 miles per hour, the result is 8.689762419 knots.
What is 15 knots in miles per hour?
15 knots is 17.26169172 miles per hour. The calculation is 15 multiplied by 1.150779448, rounded the way the widget rounds.
How many decimal places does the kn to mph converter show?
Rounding happens only when a result is displayed. Between 1 and 1,000 the display has 10 significant digits, under 1 it has 8, and from 1,000 up it allows 6 decimals with comma separators; very large or very small results switch to scientific notation. Entering 0.123456789 kn shows 0.14207154 mph, and 1,234.5678 kn shows 1,420.715251 mph.
Which formula does the kn-to-mph converter use?
Conversion goes through a shared reference unit: kn is scaled into it, and the result is scaled out into mph. The two steps combine into one multiplication by 1.150779448.
How do I turn miles per hour into knots?
The page titled "MPH to Knots" covers it, or you can press the swap button in the widget above. In the reverse direction multiply by 0.86897624, or equivalently divide by 1.150779448, giving 21.72440605 kn for an input of 25 mph.
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