How to Convert mi² to km²: Complete Guide

Converting from mi² to km² is a common task in real estate, agriculture, landscaping, and construction planning. Whether you need a quick answer or want to understand the math behind the conversion, this guide covers everything you need.

Quick Answer

**1 mi² = 2.58999 km²**. To convert any value from mi² to km², multiply by 2.58999.

The Conversion Formula

The formula is straightforward: **km² = mi² × 2.58999**. For the reverse conversion, divide by 2.58999 instead: **mi² = km² ÷ 2.58999**.

Common Conversion Table

Here are the most commonly needed conversions: - 0.1 mi² = 0.258999 km² - 0.5 mi² = 1.29499 km² - 1 mi² = 2.58999 km² - 2 mi² = 5.17998 km² - 3 mi² = 7.76996 km² - 5 mi² = 12.9499 km² - 10 mi² = 25.8999 km² - 15 mi² = 38.8498 km² - 20 mi² = 51.7998 km² - 25 mi² = 64.7497 km² - 50 mi² = 129.499 km² - 100 mi² = 258.999 km² - 250 mi² = 647.497 km² - 500 mi² = 1294.99 km² - 1000 mi² = 2589.99 km²

When You Need This Conversion

This conversion is commonly needed in real estate, agriculture, landscaping, and construction planning. Understanding the relationship between mi² and km² helps you work efficiently across different measurement systems and standards.

Tips for Quick Conversions

Since 1 mi² equals 2.58999 km², you can estimate by multiplying by roughly 3. For precise results, use our free converter which handles all the math instantly.

Use Our Free Converter

Skip the manual math and use our free mi² to km² converter for instant, accurate results. It includes a conversion table, formula explanation, and related conversions — all optimized for mobile and desktop.