Sumwise

Square miles to square kilometers

square kilometers = square miles × 2.589988

Reverse: square kilometers to square miles

How to convert square miles to square kilometers

One square mile is 2.589988 square kilometers, so multiply the number of square miles by 2.589988. For example, 20 square miles is 20 × 2.589988 = 51.799762 square kilometers. To go back, divide by the same number, or multiply by 0.38610216.

Quick estimate

Multiplying by about 2.6 gets within 0.4% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Area conversions come up when buying flooring, paint or turf, comparing house and flat sizes, and measuring land and gardens.

square milessquare kilometers
1 mi22.589988 km2
2 mi25.179976 km2
3 mi27.769964 km2
4 mi210.359952 km2
5 mi212.949941 km2
6 mi215.539929 km2
7 mi218.129917 km2
8 mi220.719905 km2
9 mi223.309893 km2
10 mi225.899881 km2
11 mi228.489869 km2
12 mi231.079857 km2
13 mi233.669845 km2
14 mi236.259834 km2
15 mi238.849822 km2
16 mi241.43981 km2
17 mi244.029798 km2
18 mi246.619786 km2
19 mi249.209774 km2
20 mi251.799762 km2
25 mi264.749703 km2
30 mi277.699643 km2
40 mi2103.599524 km2
50 mi2129.499406 km2
60 mi2155.399287 km2
70 mi2181.299168 km2
75 mi2194.249108 km2
80 mi2207.199049 km2
90 mi2233.09893 km2
100 mi2258.998811 km2
120 mi2310.798573 km2
150 mi2388.498217 km2
200 mi2517.997622 km2
250 mi2647.497028 km2
300 mi2776.996433 km2
400 mi21,036 km2
500 mi21,294.99 km2
750 mi21,942.49 km2
1,000 mi22,589.99 km2
1,500 mi23,884.98 km2
2,000 mi25,179.98 km2
5,000 mi212,949.94 km2
10,000 mi225,899.88 km2

Questions

How many square kilometers are in a square mile?

2.589988 square kilometers.

How do I convert square miles to square kilometers in a spreadsheet?

Put the value in A1 and type =A1*2.589988, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.