tigtools

Square Kilometers to Square Miles

Type a value in Square Kilometers or Square Miles; the other field updates as you type.

Runs in your browser No sign-up

10 km² = 3.861022 mi²

Decimals

Common values

Square Kilometers (km²)Square Miles (mi²)
1 km²0.386102 mi²
2 km²0.772204 mi²
2.5 km²0.965255 mi²
5 km²1.930511 mi²
10 km²3.861022 mi²
20 km²7.722043 mi²
25 km²9.652554 mi²
50 km²19.305108 mi²
100 km²38.610216 mi²
200 km²77.220432 mi²
250 km²96.52554 mi²
500 km²193.051079 mi²
1,000 km²386.102159 mi²

How to use it

  1. Type the number of Square Kilometers in the first field.
  2. Read the result in Square Miles. You can also type in the Square Miles field to convert the other way.
  3. Use the table of common values, or copy the result with one click.

How it works

Formula: mi² = km² × 0.38610216

1 km² = 0.386102 mi², and 1 mi² = 2.589988 km².

Results use the exact definitions of both units. The page shows up to 6 decimal places; copy the value for full precision.

Examples

1 km² in mi²

1 km² = 0.386102 mi², using mi² = km² × 0.38610216.

10 km² in mi²

10 km² = 3.861022 mi², using mi² = km² × 0.38610216.

100 km² in mi²

100 km² = 38.610216 mi², using mi² = km² × 0.38610216.

Frequently asked questions

How do I convert Square Kilometers to Square Miles?

Use the formula mi² = km² × 0.38610216. For example, 1 km² = 0.386102 mi².

How do I convert Square Miles back to Square Kilometers?

Use the reverse formula km² = mi² × 2.5899881. For example, 1 mi² = 2.589988 km².

How accurate is this converter?

It uses the exact legal definitions of the units, so the only rounding is in the number of decimals shown. Copy the result to get the full value.

Privacy

The conversion runs entirely in your browser. Nothing you type is sent anywhere.