Units of measurement use the International System of Units, better known as SI units, which provide a standard for measuring the physical properties of matter. Measurement like heat flux density finds its use in a number of places right from education to industrial usage. Be it buying grocery or cooking, units play a vital role in our daily life; and hence their conversions. unitsconverters.com helps in the conversion of different units of measurement like W/in² to BTU/s*ft² through multiplicative conversion factors. When you are converting heat flux density, you need a Watt per Square Inch to Btu (th) per Second per Square Foot converter that is elaborate and still easy to use. Converting W/in² to Btu (th) per Second per Square Foot is easy, for you only have to select the units first and the value you want to convert. If you encounter any issues to convert Watt per Square Inch to BTU/s*ft², this tool is the answer that gives you the exact conversion of units. You can also get the formula used in W/in² to BTU/s*ft² conversion along with a table representing the entire conversion.