Convert watt/square meter to watt/square inch

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Watt/Square Meter

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

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 Meter to Watt/Square Inch conversion table
Watt/Square MeterWatt/Square InchWatt/Square InchWatt/Square Meter
10.000645211550
20.0012903223100.01
30.0019354834650.01
50.003225857750.02
100.00645161015500
200.01290322031000.1
250.0161292538750.1
500.0322585077500.2
1000.064516100155000
2500.16129250387501
5000.32258500775002
10000.6451610001.55E+06
How to convert Watt/Square Meter to Watt/Square Inch

1 W/m² = 0.0006452 W/in². To convert any value, multiply it by 0.0006452. For example, 25 W/m² = 0.016129 W/in².

Frequently asked questions
How many W/in² are there in one W/m²?
One W/m² is equal to 0.0006452 W/in².
How do you convert Watt/Square Meter to Watt/Square Inch?
Multiply the value in Watt/Square Meter by 0.0006452 to get the result in Watt/Square Inch.
How much is 25 W/m² in W/in²?
25 W/m² is equal to 0.016129 W/in².
How do you convert Watt/Square Inch back to Watt/Square Meter?
Divide by the same factor: multiply the value in Watt/Square Inch by 1550 to get Watt/Square Meter.

Most common heat flux density unit conversions