Search Ctrl K
Home / Tools
THE FEUTEX TOOLKIT

Btu it per second square foot to watt per square meter

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

Need another unit? Open the complete Heat flux workspace →

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

Reference table

BTU IT/(s·ft²)W/m²
111356.5266822
556782.6334111
10113565.266822
25283913.167056
50567826.334111
1001135652.66822

How the conversion works

The input is converted into W/m² using the source factor and offset, then into watt per square meter. 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 BTU IT per second square foot.
  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.