How to Convert km² to mi²: Complete Guide

Converting from km² to mi² 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 km² = 0.386102 mi²**. To convert any value from km² to mi², multiply by 0.386102.

The Conversion Formula

The formula is straightforward: **mi² = km² × 0.386102**. For the reverse conversion, divide by 0.386102 instead: **km² = mi² ÷ 0.386102**.

Common Conversion Table

Here are the most commonly needed conversions: - 0.1 km² = 0.0386102 mi² - 0.5 km² = 0.193051 mi² - 1 km² = 0.386102 mi² - 2 km² = 0.772204 mi² - 3 km² = 1.15831 mi² - 5 km² = 1.93051 mi² - 10 km² = 3.86102 mi² - 15 km² = 5.79153 mi² - 20 km² = 7.72204 mi² - 25 km² = 9.65255 mi² - 50 km² = 19.3051 mi² - 100 km² = 38.6102 mi² - 250 km² = 96.5255 mi² - 500 km² = 193.051 mi² - 1000 km² = 386.102 mi²

When You Need This Conversion

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

Tips for Quick Conversions

Since 1 km² equals 0.386102 mi², each km² is somewhat smaller than a mi². For quick estimates, divide by 2.58999. For precise results, use our free converter tool.

Use Our Free Converter

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