Insulation R-Value Calculator
Thickness & IECC Zone Lookup
$4.99 · Designed for iPad. Not verified for macOS.
Also Included In
Calculate insulation R-values and required thickness instantly — built for contractors and builders.
Not sure if your wall insulation meets code for your climate zone? This calculator instantly converts between R-value and thickness for 9 common materials — and shows you IECC minimum requirements so you pass inspection the first time.
Select an insulation material, enter thickness to get R-value, or enter target R-value to find required thickness. Built-in IECC climate zone reference shows minimum R-values for walls, ceilings, and floors at a glance.
WHAT IT CALCULATES:
R-Value from Thickness:
- Select an insulation material from the built-in list
- Enter the installed thickness in inches
- Get the total R-value and U-factor instantly
Required Thickness:
- Choose your insulation material
- Enter your target R-value
- See the exact thickness needed to meet that R-value
MATERIALS INCLUDED:
- Fiberglass Batt (R-3.2/in)
- Fiberglass Blown (R-2.5/in)
- Cellulose Blown (R-3.5/in)
- Mineral Wool (R-3.3/in)
- XPS Foam Board (R-5.0/in)
- EPS Foam Board (R-3.8/in)
- Polyisocyanurate (R-6.0/in)
- Spray Foam Open Cell (R-3.6/in)
- Spray Foam Closed Cell (R-6.5/in)
IECC CLIMATE ZONE REFERENCE:
- Built-in IECC climate zone lookup (Zones 1 through 7-8)
- See minimum R-value requirements for walls, ceilings, and floors
- Quickly check if your insulation meets code for your zone
KEY FEATURES:
- Two-way calculator: R-value from thickness or thickness from R-value
- U-factor output for energy calculations
- 9 common insulation materials with accurate R-per-inch values
- IECC climate zone minimum requirements built in
- Works completely offline
- No account or login required
BUILT FOR THE JOB SITE:
Whether you are an insulation contractor, general contractor, home inspector, or energy auditor, InsulR Calc gives you quick R-value lookups and thickness calculations. Enter your material and thickness to get R-value, or enter your target R-value to find required thickness in seconds.
Supports all common residential and commercial insulation materials per IECC and ASHRAE standards.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added a More Pro Tools section to discover related field calculators.
The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shanghai Sheyuan Network Technology Co., Ltd.
- Size
- 1.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sheyuan Inc.
