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Terms of Use

The terms for using ComponentCalc, including how to treat the estimates.

Estimates only

ComponentCalc provides free calculators that produce planning estimates. The results are not a guarantee of the exact quantity your project will require. Material properties, site conditions, product specifications, layout, waste and human error all affect real world quantities.

Verify before you buy

Always round up and confirm the final quantity with your supplier or a qualified professional before ordering or starting work. Do not rely solely on these calculators for structural, safety critical or code regulated work.

No liability

ComponentCalc and its operators accept no liability for shortfalls, overages, costs, delays or damages arising from use of the calculators or guides. You use the site at your own risk.

Use of the site

Content is provided for personal and professional reference. You may not republish the calculators or content wholesale. Links to retailers may be affiliate links, as described in our affiliate disclosure.

These terms may be updated. Continued use of the site means you accept the current terms.

More Calculators

Concrete New
Enter slab dimensions. Result rounds up with a 7 percent waste allowance.
Gravel New
Enter the area dimensions and depth. Result rounds up with a 5 percent waste allowance.
Mulch New
Enter the bed area and depth. Result rounds up with a 5 percent allowance.
Topsoil New
Enter the area and depth. Result rounds up with a 5 percent allowance.
Paint New
Enter total wall area and coats. Result rounds up to whole units.
Flooring New
Enter room area and the coverage printed on the box. 10 percent waste added.
Tile New
Enter the area and one tile size. 10 percent waste added.
Drywall New
Enter total area to cover. 10 percent waste added.
Paver New
Enter the patio size and one paver size. 5 percent waste added.
Sand New
Enter the area and depth. 5 percent allowance added.
Roofing New
Enter the roof surface area. 10 percent waste added. Three bundles per square.
Insulation New
Enter area to cover and the coverage printed on the package. 5 percent added.
Fence New
Enter total fence length and post spacing.
Sod New
Enter the area to cover. 5 percent allowance added.
Grass Seed New
Enter area and seeding rate. Default rates suit a new lawn.
Fertilizer New
Enter area, target nitrogen rate and the first number on the bag.
Cubic Yards New
Enter length, width and depth. No waste added.
Square Footage New
Enter length and width.
Board Foot New
Enter board dimensions and quantity.
Material Cost New
Enter quantity, unit price, tax and delivery. Figures are in your own currency.
Knowledge Base

Estimating Guides & Reference

Plain-language guides on measuring, coverage and how much extra to buy, written for DIYers and trades.

Measuring & Estimating
Concrete & Aggregate
Soil & Lawn
Interior & Finishing
View all guides →