📐 mi² to km² — Square Mile to Square Kilometer Converter
Convert area units — square meters, square feet, acres, hectares, cents, grounds and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mi² | 0.00258999 km² | |
| 0.01 mi² | 0.0258999 km² | |
| 0.1 mi² | 0.258999 km² | |
| 1 mi² | 2.58999 km² | |
| 5 mi² | 12.9499 km² | |
| 10 mi² | 25.8999 km² | |
| 50 mi² | 129.499 km² | |
| 100 mi² | 258.999 km² | |
| 1000 mi² | 2589.99 km² |
About this area conversion
Area measures the size of a two-dimensional surface. Square metres and hectares are used in the metric system, while acres and square feet are common in the imperial system.
About Square Mile to Square Kilometer Conversion
The Square Mile (mi²) and the Square Kilometer (km²) are both units of area. Converting between them is straightforward using the formula above.
Formula: 1 mi² = 2.58999 km²
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
Frequently Asked Questions
How do I convert Square Mile to Square Kilometer?
Use the converter above — enter your value in Square Mile and the result appears instantly in Square Kilometer. The formula is: 1 mi² = 2.58999 km²
How many Square Kilometer are in 100 Square Mile?
100 mi² = 258.999 km²
What is 1 Square Mile in Square Kilometer?
1 mi² = 2.58999 km²
Is this Square Mile to Square Kilometer converter free?
Yes — Unitafy is completely free, requires no signup, and works instantly in your browser.
About Square Mile and Square Kilometer
Square Mile
Equal to 5,280 feet or 1.60934 km. The standard road distance unit in the US and UK.
Square Kilometer
Equal to 1,000,000 square meters. Used for measuring cities, countries, and large land parcels.