Square Miles to Square Kilometers Converter

How It Works: This tool converts area measurements from square miles (mi²) to square kilometers (km²). Simply enter a value in square miles and click "Convert" to see the equivalent in square kilometers. The conversion uses the factor: 1 square mile = 2.58998811 square kilometers.

Quick Reference:

  • 1 square mile = 2.58998811 square kilometers
  • 1 square kilometer = 0.38610216 square miles
  • 1 square mile = 640 acres
  • 1 square kilometer = 100 hectares

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Quick and Easy Conversion

Convert square miles to square kilometers with precise math. Enter an area in square miles and get the result in square kilometers. The factor is clear and standard. One square mile equals 2.58998811 square kilometers.

How It Works

Step 1: Enter Your Value

Type an area in square miles mi² in the input box. You can enter whole numbers or decimals. Use positive numbers only. Examples include 1, 2.5, and 100.

Step 2: Click the Convert Button

Click Convert to run the calculation. You can press Enter to convert. The tool converts after a short pause while you type. Invalid entries trigger a message that asks for a valid positive number.

Step 3: View the Result

You will see the result in square kilometers km². The text shows both units in one line. Kilometers round to six decimals with extra zeros removed. Use Clear to reset the input and result.

Why Use Our Converter?

This square miles to square kilometers tool saves time and reduces errors. It gives clear outputs you can trust.

Need More Information?

Use this formula for every conversion. Square kilometers equals square miles multiplied by 2.58998811. For reference, 1 square kilometer equals 0.38610216 square miles.

Quick reference values help with context.

Keep these input rules in mind.

Here is how to read the output. 10 square miles equals 25.899881 square kilometers. That line states the conversion for the value you entered.

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