Insulation Savings Calculator

Home insulation reduces heat loss through walls, loft, and floor. Higher R-value = better insulation

The calculator uses the standard published formula for home insulation. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Heat loss ∝ Area × U-value × ΔT (U = 1/R). Each step in the calculation is shown so you can verify the result manually.