Square Meter to Square Kilometer Converter
Area · unit-converter
Convert Square Meter to Square Kilometer with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use square-meter-based definitions (international feet / yard standards, acre, hectare, and regional units like pyeong/tsubo).
Calculator
From: Square Meter (m2)
To: Square Kilometer (km2)
About Square Meter
The square meter is the SI derived unit of area. Floor plans, building codes, and science typically use square meters.
About Square Kilometer
The square kilometer is a metric unit equal to one million square meters. It is standard for city sizes, large properties, and regional planning in metric countries.
How to convert square meters to square kilometers
1 square meter is equal to 0.000001 square kilometer:
1 m2 = (1 m² ÷ 1000000 m²) km2 = 0.000001 km2
Each square meter is defined as 1 m² and each square kilometer as 1000000 m², so one m2 equals 1 ÷ 1000000 km2 = 0.000001 km2.
Let a(m2) be the numeric value of the same area measured in Square Meter (m2), and a(km2) the value in Square Kilometer (km2). Then:
a(km2) = a(m2) × (1 / 1000000)
Equivalently, divide by how many m2 fit into one km2 (m² per km2 divided by m² per m2):
a(km2) = a(m2) ÷ 1000000
Or: square kilometer = square meter ÷ 1000000
Examples
Example #1: Convert 20 m2 to square kilometer
20 m2 = 20 m2 × (1/1000000) km2 = 0.00002 km2
20 m2 = 20 m2 ÷ 1000000 = 0.00002 km2
Example #2: Convert 50 m2 to square kilometer
50 m2 = 50 m2 × (1/1000000) km2 = 0.00005 km2
50 m2 = 50 m2 ÷ 1000000 = 0.00005 km2
Summary
To convert Square Meter to Square Kilometer, multiply the value in m2 by the ratio of square meters per m2 divided by square meters per km2. Equivalently: value_km2 = value_m2 × (1 / 1000000). Numerically, 1 m2 equals 0.000001 km2.
Relationship context
Both units are metric (SI) and tied to the square meter. Conversions use exact ratios from their m² definitions. The factor from Square Meter to Square Kilometer is 1.000000e-6 (1 m2 = 0.000001 km2).
Conversion tables
| Square Meter (m2) | Square Kilometer (km2) |
|---|---|
| 0.1 | 0.0000001 |
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 4 | 0.000004 |
| 5 | 0.000005 |
| 6 | 0.000006 |
| 7 | 0.000007 |
| 8 | 0.000008 |
| 9 | 0.000009 |
| Square Meter (m2) | Square Kilometer (km2) |
|---|---|
| 10 | 0.00001 |
| 20 | 0.00002 |
| 30 | 0.00003 |
| 40 | 0.00004 |
| 50 | 0.00005 |
| 60 | 0.00006 |
| 70 | 0.00007 |
| 80 | 0.00008 |
| 90 | 0.00009 |
| 100 | 0.0001 |