Convert square mile (mi²) to square kilometer (km²).
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Square Kilometer to Square Mile Converter (sq km to sq mi)
Convert square kilometer (km²) to square mile (mi²).Unit Converter · Area
Quick answer
1 square kilometer (sq km) is approximately equal to 0.3861022 square miles (sq mi). 1 square mile (sq mi) is approximately equal to 2.589988 square kilometers (sq km).
To convert sq km to sq mi, multiply the value in square kilometers by 0.3861021585. For example, 10 sq km = 3.86102159 sq mi, and 100 sq km = 38.61021585 sq mi.
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Quick reference — square kilometer to square mile
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How to convert square kilometers to square miles
How many square miles are in a square kilometer? 1 square kilometer is about 0.3861022 square miles. This free km² to mi² converter and square kilometer to square mile calculator gives the answer instantly for any value, and the same conversion is also written as square kilometre to square mile and sq km to sq mi.
To convert square kilometer (km²) to square mile (mi²), multiply the value in square kilometers by 0.3861021585.
mi² = km² × 0.3861021585
- 1
Take the value in square kilometers
For example, 25 km².
- 2
Multiply by 0.3861021585
25 × 0.3861021585.
- 3
Read the answer in square miles
25 km² = 9.65255396 mi².
Square Kilometer to Square Mile conversion table
Common values from 1 to 1,000 square kilometers converted to square miles.
| Square Kilometer (km²) | Square Mile (mi²) |
|---|---|
| 1 km² | 0.38610216 mi² |
| 2 km² | 0.77220432 mi² |
| 3 km² | 1.15830648 mi² |
| 4 km² | 1.54440863 mi² |
| 5 km² | 1.93051079 mi² |
| 6 km² | 2.31661295 mi² |
| 7 km² | 2.70271511 mi² |
| 8 km² | 3.08881727 mi² |
| 9 km² | 3.47491943 mi² |
| 10 km² | 3.86102159 mi² |
| 15 km² | 5.79153238 mi² |
| 20 km² | 7.72204317 mi² |
| 25 km² | 9.65255396 mi² |
| Square Kilometer (km²) | Square Mile (mi²) |
|---|---|
| 30 km² | 11.58306476 mi² |
| 40 km² | 15.44408634 mi² |
| 50 km² | 19.30510793 mi² |
| 60 km² | 23.16612951 mi² |
| 70 km² | 27.0271511 mi² |
| 75 km² | 28.95766189 mi² |
| 80 km² | 30.88817268 mi² |
| 90 km² | 34.74919427 mi² |
| 100 km² | 38.61021585 mi² |
| 250 km² | 96.52553964 mi² |
| 500 km² | 193.05107927 mi² |
| 1,000 km² | 386.10215854 mi² |
About square kilometers and square miles
Square Kilometer (km²)
A square kilometer (km²) is 1,000,000 square meters, or 100 hectares. It is used for the area of cities, districts and countries.
Square Mile (mi²)
A square mile is 640 acres, about 2.59 square kilometers. It is used for large land areas in the US and UK.
km² to mi²: common questions
- How many square miles are in 1 square kilometer?
- 1 square kilometer (sq km) is approximately equal to 0.3861022 square miles (sq mi). In short: 1 sq km ≈ 0.3861022 sq mi.
- How do I convert square kilometers to square miles?
- To convert km² to mi², multiply the value in square kilometers by 0.3861021585. For example, 5 km² = 1.93051079 mi².
- How do I convert square miles to square kilometers?
- Use the Square Mile to Square Kilometer converter, which applies the exact reverse factor.
- What is 10 km² in mi², and what is 100 km²?
- 10 km² = 3.86102159 mi², and 100 km² = 38.61021585 mi². The table above lists more values from 1 to 1,000.
- Is this km² to mi² converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
Square Mile to Square Kilometer converter →All Area converters →
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