Free Chrome extension by CGS
Construction Unit Converter
Convert construction measurements between imperial and metric units, right in your browser.
Quick conversions for material specifications, equipment dimensions, drawings, and estimates. No account or internet connection required for calculations.
Chrome Web Store release coming soon.
Four conversion categories
Length
Inches, feet, yards, millimeters, centimeters, meters.
Area
Square inches, square feet, square yards, square centimeters, square meters.
Volume
Cubic inches, cubic feet, cubic yards, liters, cubic meters.
Weight
Ounces, pounds, kilograms.
Uses international feet and avoirdupois pounds and ounces.
How it works
- Choose Length, Area, Volume, or Weight.
- Enter a value and select the source and target units.
- Read the result, swap units, or copy the result with its unit.
Results update as you type. Use a dot or comma for decimals, without thousands separators.
Common construction conversions
| From | To |
|---|---|
| 1 ft | 0.3048 m |
| 1 in | 25.4 mm |
| 1 ft² | 0.09290304 m² |
| 1 yd³ | ≈ 0.764554858 m³ |
| 1 lb | 0.45359237 kg |
Displayed results use up to 10 significant digits. Rounded results are marked as approximate.
Your calculations stay in your browser
The extension does not read websites or browsing history. It does not save your inputs or send them to CGS or external services. Copying a result happens only when you click ‘Copy result’.
Frequently asked questions
Is the extension free?
Yes. Construction Unit Converter is free and does not require an account.
Does it work offline?
Yes. Unit conversions run locally and do not require an internet connection. Opening the CGS website requires a connection.
Does it read the page I am viewing?
No. The extension works independently of the current page and does not request access to website content.
Can I convert square feet to cubic yards?
No. Conversions are available within the same category. Converting area to volume requires an additional measurement, such as depth.
How are results rounded?
Results are displayed with up to 10 significant digits. Very small or large results may use scientific notation. Rounded values are marked with an approximation symbol.
Does it save my calculations?
No. Inputs and results remain only in the open popup and are reset when it closes.
Make your everyday workflows easier
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