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Watt per square meter to BTU IT per second square foot

Convert watt per square meter (W/m²) to BTU IT per second square foot (BTU IT/(s·ft²)) with adjustable precision, a worked example and a reference table.

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Converters workspace● Runs in your browser
01 Your input
02 Your result
YOUR RESULT
Ready when you are
Conversion formula(value × 1 + 0 − 0) ÷ 11356.526682226975

Reference table

W/m²BTU IT/(s·ft²)
18.80550918412e-05
50.000440275459206
100.000880550918412
250.00220137729603
500.00440275459206
1000.00880550918412

How the conversion works

The input is converted into W/m² using the source factor and offset, then into BTU IT per second square foot. This keeps unit definitions consistent across the heat flux collection.

Definitions and sources

Factors are maintained in the versioned unit dataset. Output is rounded to your selected significant digits; calculation uses JavaScript double precision.

How to use this tool

  1. Enter a finite numeric value in watt per square meter.
  2. Choose the significant digits for your result.
  3. Copy or download the result, including its formula.

Try this example

10

Accuracy and scope

Conversions use fixed unit definitions; results are rounded to floating-point precision.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.