Permeability Converter
Convert between 5 permeability units.
About Permeability
Permeability here means water vapour permeability — how much moisture passes through a building material. The perm is the US unit, and because it depends on temperature there are separate 0 °C and 23 °C versions. Below 1 perm a material counts as a vapour retarder: polythene sheet is far below that, while plasterboard is well above.
Conversion table — 1 unit in kilogram/pascal/second/square meter
| Unit | Kilogram/pascal/second/square meter |
|---|---|
| Kilogram/pascal/second/square meter | 1 |
| Perm (0°C) | 5.7213e-11 |
| Perm (23°C) | 5.7453e-11 |
| Perm inch (0°C) | 1.4532e-12 |
| Perm inch (23°C) | 1.4593e-12 |
Permeability conversions — frequently asked
- What is 1 Kilogram/pascal/second/square meter in perm (0°c)?
- 1 Kilogram/pascal/second/square meter = 17478400000 perm (0°c).
- What is 1 Kilogram/pascal/second/square meter in perm (23°c)?
- 1 Kilogram/pascal/second/square meter = 17405700000 perm (23°c).
- What is 1 Kilogram/pascal/second/square meter in perm inch (0°c)?
- 1 Kilogram/pascal/second/square meter = 688127000000 perm inch (0°c).
- What is 1 Kilogram/pascal/second/square meter in perm inch (23°c)?
- 1 Kilogram/pascal/second/square meter = 685265000000 perm inch (23°c).
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About Unit Converter
A unit converter changes a measurement from one unit to another. Pick a category — length, weight, temperature, data, area, speed, and 75+ more, including engineering and scientific units like pressure, torque, and viscosity — enter a value, and get an accurate conversion instantly. It runs in your browser with no sign-up and nothing to install.
Frequently asked questions
- How many unit categories are supported?
- Over 75, from everyday units (length, mass, temperature, volume, area, speed, data storage) to technical and scientific ones (energy, pressure, torque, viscosity, molar concentration, luminance, and more).
- Does it convert engineering and scientific units?
- Yes. Alongside common units it covers engineering and scientific categories — force, pressure, torque, thermal, flow, radiology, and CSS/typography units — with precise conversion factors.
- Are the conversions accurate?
- Yes. Conversions use standard factors and precise formulas, including non-linear ones like temperature, so results are exact.
- Do I need to install an app?
- No download needed — it's a free web app that runs in any modern browser on phone, tablet, or desktop, with nothing to install and nothing sent anywhere.
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