8 miles to kilometers
12.87 km
8 mi = 12.87 km.
kilometers
12.87km
8 mi = 12.87 km
The short answer
How many kilometers is 8 miles?
8 mi = 12.87 km. 1 mile = 1.609344 kilometers, so the working is 8 × 1.609344 = 12.87.
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 8 × 1.609344 = 12.87
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 | 13 | +0.12525 |
| 1 decimal | 12.9 | +0.02525 |
| 2 decimals | 12.87 | −0.00475 |
Round trip: take 12.87 km back the other way and you land on 7.9970 mi — a drift of 0.0030 mi. That gap is the rounding, not the conversion.
Frequently asked questions
What is 8 miles in kilometers?
8 miles is 12.87 kilometers. 1 mile = 1.609344 kilometers, so the working is 8 × 1.609344 = 12.87.
How accurate is 12.87 km?
Rounding to 12.87 km and converting straight back gives 7.9970 mi, a drift of 0.0030 mi from the 8 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
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