# Insulation R-Value Calculator — Thickness & IECC Zone Lookup

> Thickness & IECC Zone Lookup (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/insulation-r-value-calculator/id6761641098 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities, Productivity
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-04-07
- Data updated: 2026-08-12
- User reviews in markdown: https://appshunter.io/ios/app/insulation-r-value-calculator/id6761641098/reviews.md

## What is Insulation R?

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.


## Version history (last 3 releases)

### 1.0.2 — 2026-06-28

Added a More Pro Tools section to discover related field calculators.

### 1.0.1 — 2026-04-12

Bug fixes and performance improvements.

### 1.0 — 2026-04-07

No release notes.

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All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-12.*