Convert watt/square inch to watt/square metre

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Watt/Square Inch

The watt per square inch (W/in²) equals approximately 1550 W/m² and is an imperial unit of heat flux used in US electronics packaging, printed circuit board thermal analysis, and component cooling design where inch-based dimensions are common. 


Watt/Square Metre

The watt per square metre (W/m²) is the SI unit of heat flux density and irradiance. It represents the power transmitted per unit area. The solar constant (total solar irradiance) at Earth's orbit is approximately 1361 W/m². Used in heat transfer engineering, solar energy, and thermal radiation analysis. 


Watt/Square Inch to Watt/Square Metre conversion table
Watt/Square InchWatt/Square MetreWatt/Square MetreWatt/Square Inch
1155010.0006452
23100.0120.00129032
34650.0130.00193548
57750.0250.0032258
1015500100.0064516
2031000.1200.0129032
2538750.1250.016129
5077500.2500.032258
1001550001000.064516
2503875012500.16129
5007750025000.32258
10001.55E+0610000.64516
How to convert Watt/Square Inch to Watt/Square Metre

1 W/in² = 1550 W/m². To convert any value, multiply it by 1550. For example, 25 W/in² = 38750.1 W/m².

Frequently asked questions
How many W/m² are there in one W/in²?
One W/in² is equal to 1550 W/m².
How do you convert Watt/Square Inch to Watt/Square Metre?
Multiply the value in Watt/Square Inch by 1550 to get the result in Watt/Square Metre.
How much is 25 W/in² in W/m²?
25 W/in² is equal to 38750.1 W/m².
How do you convert Watt/Square Metre back to Watt/Square Inch?
Divide by the same factor: multiply the value in Watt/Square Metre by 0.0006452 to get Watt/Square Inch.

Most common heat flux density unit conversions