Menu
Products
Overview
Universal series
Universal series window wall
Storefront Glazing
Cascadia clip
Curtain wall vent adaptor
Classic window products
Technology
Energy performance
Why Fiberglass?
Suppliers
Intellectual Property
Design
Design Gallery
Custom products
Glazing options
Hardware + egress
Finishes
Screens
Tools
Overview
Cascadia Clip Calculator
Cascadia Clip Quote Request
NAFS Calculator
R-Value/U-Value calculator
Support
Downloads
Frequently asked questions
Webinars
Technical Bytes
Adjustments and Maintenance
Installation
Green Building Support
Warranty
Press Room
News
Contact
us
Contact
Book a factory tour
Book a lunch and learn
About
us
About us
Corporate Resume
Career opportunities
Testimonials, industry awards
Instagram
Twitter
LinkedIn
Search
×
R-Value & U-Value Calculator
Find out which assemblies have the biggest impact on your overall envelope performance.
This calculator simplifies area-weighted R-value or U-value calculations. Inputs for R-value or U-value are imperial units only.
Use it to find combined thermal resistance, based on the effect of multiple assemblies.
Assemblies
R-Value (effective)
U-Value
Area (sf or m²)
Area (%)
Add new row
Delete row
Results
area total -->
Total U-value:
(imp)
(metric)
Total R-value:
(imp)
(metric)