Square miles to hectares Converter

Enter the square miles, then press Calculate. The hectares stay hidden while you type.

Press Calculate after the entries are in.

What this area conversion is for

Use this page when a measurement is written in square miles and the next step needs hectares. The number stays blank until you press Calculate, so a half-typed entry is never mistaken for the answer.

The factor

Multiply by the factor: 1 square mile = 258.99881103 hectares.

A worked example

10 square miles are 2,589.98811034 hectares. Multiply the result by the reverse factor if you want the original number back.

How to check it

Write the factor down, do the multiply on paper, and compare it with the result card. If you change a sentence on this page, edit the HTML file and reload. The form and this note live in the same file.

The reverse conversion is hectares to square miles. A nearby pair in the same units is square miles to acres. When the converted number is the input to a job, continue with the acreage.