Thermal Resistance Calculator

INSULATION v1.0

Total R = insulation R + other layer R + interior air film (ASHRAE typical R-0.68) + exterior air film (R-0.17). U-value = 1 / total R.

Civil & Structural Engineering Tools

Inputs

Results

Total Assembly R-Value
15.85 R
U-Value:0.063 Btu/hr·ft²·°F

Total R = insulation R + other layer R + interior air film (ASHRAE typical R-0.68) + exterior air film (R-0.17). U-value = 1 / total R.

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À propos et fonctionnement

Discover how Thermal Resistance Calculator executes your workflow locally in your browser with zero server uploads and total privacy.

Thermal Resistance Calculator on Neranjan Tools is an ultra-fast, client-side utility crafted to deliver professional-grade processing without the privacy risks or upload delays of traditional cloud services. Whether handling sensitive business contracts, personal photos, or code snippets, you can accomplish your task in seconds.

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Guide étape par étape

1

Enter Layer R-Values

Input the insulation R-value and any additional sheathing/other layer R-values.

2

Include Air Films

Keep the ASHRAE-typical interior (R-0.68) and exterior (R-0.17) air film defaults, or adjust for your conditions.

3

Get U-Value

View total assembly R-value and its reciprocal U-value.

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Aide et base de connaissances

Questions fréquentes (10)

Questions et réponses courantes concernant cet outil.

Still air layers on both interior and exterior surfaces provide measurable insulating resistance — ASHRAE typical values are R-0.68 (interior) and R-0.17 (exterior).
U-value is the reciprocal of total R-value (U = 1/R) and measures heat transfer rate — lower U-values indicate better insulated assemblies.
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Historique des versions

Version actuelle: v1.0
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