R-value, U-value, window upgrade, and insulation payback calculators. Browse our free insulation tools below — all calculators are instant, accurate, and require no sign-up.
Attic Insulation Payback Calculator — Calculate the payback period for adding attic insulation. Estimate annual savings and ROI from upgrading your attic insulation R-value.
Door Weatherstripping Savings Calculator — Calculate energy savings from weatherstripping exterior doors. Estimate how much you save by reducing air leakage around doors with this free calculator.
Insulation R-Value to Savings Calculator — Calculate annual energy savings from upgrading insulation R-value. Estimate how much you save by increasing insulation in walls, attics, or floors.
Radiant Barrier Savings Calculator — Calculate cooling savings from installing a radiant barrier in your attic. Estimate reduced heat gain and lower air conditioning costs.
Storm Window Value Calculator — Calculate energy savings from adding storm windows over existing windows. Compare storm window costs and payback vs full window replacement.
Thermal Transmittance (U-Value) Calculator — Calculate the total U-value of a multi-layer wall, roof, or floor assembly. Combine R-values of individual material layers to find overall thermal transmittance.
Triple-Pane Window ROI Calculator — Calculate the return on investment for triple-pane windows vs double-pane. Compare energy savings and payback for triple-glazed window upgrades.
U-Value ↔ R-Value Converter — Convert between U-value and R-value for insulation and building materials. Calculate thermal resistance from thermal transmittance and vice versa.
Wall Insulation Payback Calculator — Calculate the payback period for wall insulation upgrades. Estimate annual energy savings and ROI from insulating or re-insulating your exterior walls.
Window Upgrade ROI Calculator — Calculate the return on investment for upgrading windows. Estimate energy savings from replacing old single or double-pane windows with modern efficient windows.