Convert Fahrenheit degree hours per Btu IT to Kelvins per watt

How to convert Fahrenheit degree hours per Btu IT to kelvins per watt

These units describe thermal resistance K/W. Area-normalized insulation R-values in m²·K/W need a known area and are not interchangeable with whole-object resistance.

Use x for the value in °F·h/Btu IT, b for the intermediate value in K/W, and y for the result in K/W.

K/W = °F·h/Btu IT × 1.8956342406266344

Worked examples

• 10 °F·h/Btu IT ≈ 18.9563424063 K/W

  Step 1: (10 × 1.89563424063) ≈ 18.9563424063 K/W.
  Step 2: 18.9563424063 ÷ 1 ≈ 18.9563424063 K/W.

• 20 °F·h/Btu IT ≈ 37.9126848125 K/W

  Step 1: (20 × 1.89563424063) ≈ 37.9126848125 K/W.
  Step 2: 37.9126848125 ÷ 1 ≈ 37.9126848125 K/W.

Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.

Keep these unit conventions consistent when using measurements in construction calculations.