Knots to miles per hour converter
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Convert knots to mph instantly: 1 knot is 1.15 mph. Sailing, aviation and weather, with the exact math and one-click copying.
a knot is 1.15 mph — the sea mile refuses to be a land one.
work surface
Math, not advice — results are indicative. Read the disclaimer.
pro tips
Rough math: multiply by 1.15. 30 knots is about 34.5 mph.
A 100-knot gust is 115 mph — the forecast that stops being polite.
1 knot is 1.15 mph; the sea mile is the reason the multiplier exists.
what it does
One knot is 1.151 miles per hour. Multiply knots by 1.151 and the miles per hour appear, which is what a marine or aviation speed becomes on a road-scale readout.
It shows up when a sailing or flight speed in knots has to be understood by someone who thinks in mph, when a weather forecast quotes gust strength in knots and a commute is planned in mph, when a boat's speed is compared to a car's, and in any conversion between the water and the asphalt.
The shortcut: 1 knot is about 1.15 mph, so 10 knots is 11.5 mph, 30 knots is 34.5 mph, and 100 knots is 115 mph — a number that turns a modest-sounding wind into something serious. The 15% gap comes from the nautical mile being longer than the statute mile.
Type any knot value and the widget answers in miles per hour instantly, with the math on screen. Click to copy, and swap when an mph speed has to be read back in knots.
quick answers
How many mph is a knot?
1.151.
Is 1 knot faster than 1 mph?
Yes — about 15% faster. A nautical mile is longer than a land mile.
Why convert knots to mph?
Because marine and aviation reports use knots while most people gauge speed in miles per hour.