Square Miles to Square Kilometers

Convert square miles to square kilometers instantly.

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Formula

1 square mile = 2.58999 square kilometers

Unit Relationship

1 square mile equals 2.58999 square kilometers on this converter. Multiply square miles by 2.58999 to convert to square kilometers.

Worked Example

For 10 square miles: 10 × 2.58999 = 25.8999 square kilometers.

Unit Definitions

Square Miles: A square mile is the area of a square measuring one mile on each side.

Square Kilometers: A square kilometer is the area of a square measuring one kilometer on each side.

Practical Uses

• comparing geographic areas across imperial and metric sources
• converting municipality, region, or land-area figures
• reviewing maps and geographic data
• comparing large property or territory measurements

Precision and Rounding

This page uses a factor of 2.58999 square kilometers per square mile. Displayed results may be rounded.

Important Notes

• Square-mile and square-kilometer conversions are area conversions, not linear distance conversions.
• Map and geographic datasets may use more precise stored values than displayed summaries.
• Ten square miles converts to 25.8999 square kilometers.

Quick Reference

Square Miles	Square Kilometers
1	2.59
10	25.8999
50	129.4995
100	258.999

Frequently Asked Questions

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