1 miles to kilometers
1.61 km
1 mi = 1.61 km.
kilometers
1.61km
1 mi = 1.61 km
The short answer
How many kilometers is 1 miles?
1 mi = 1.61 km. 1 mile = 1.609344 kilometers, so the working is 1 × 1.609344 = 1.61.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 mile = 1.609344 kilometers 1 × 1.609344 = 1.61
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (km) | Off by |
|---|---|---|
| Whole number | 2 | +0.39066 |
| 1 decimal | 1.6 | −0.00934 |
| 2 decimals | 1.61 | +0.00066 |
Round trip: take 1.61 km back the other way and you land on 1.0004 mi — a drift of 0.0004 mi. That gap is the rounding, not the conversion.
Frequently asked questions
What is 1 miles in kilometers?
1 miles is 1.61 kilometers. 1 mile = 1.609344 kilometers, so the working is 1 × 1.609344 = 1.61.
How accurate is 1.61 km?
Rounding to 1.61 km and converting straight back gives 1.0004 mi, a drift of 0.0004 mi from the 1 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
Miles to Km Converter
Convert miles to kilometers — marathons, road trips abroad, and run logs.
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