Deck Material Calculator
Calculate how many deck boards you need for your project in seconds.
Deck Dimensions
Enter your deck measurements
Deck Board Details
Enter your decking specifications
Material & Cost
Optional cost calculation
Deck Materials
How to Calculate Deck Boards
Enter your deck length and width, then provide the width, spacing and length of your decking boards. The calculator estimates the number of boards required and adds your selected waste allowance.
Decking Waste Allowance
A waste allowance helps account for cutting, trimming, damaged boards and installation mistakes.
Concrete Calculator
Calculate the amount of concrete you need for slabs, footings, columns and circular projects.
Project Type
Select the type of concrete project
Measurement Units
Choose your preferred measurement system
Project Dimensions
Enter your concrete dimensions
Material & Cost
Add waste and optional concrete bag pricing
Concrete Required
How to Calculate Concrete
To calculate the amount of concrete required for a rectangular slab, multiply the length by the width and the concrete thickness. Convert the result into cubic feet or cubic yards depending on your project requirements.
Recommended Waste Allowance
Adding a waste allowance can help compensate for uneven surfaces, cutting, spillage and minor measurement errors.
Concrete Calculator FAQ
How much concrete do I need for a 10 × 10 slab?
The amount depends on the slab thickness. For example, a 10 × 10 foot slab that is 4 inches thick requires approximately 1.23 cubic yards of concrete before adding waste.
How much extra concrete should I order?
A 5% to 10% allowance is commonly used for straightforward projects. More may be appropriate when the site has uneven ground or a complex shape.
Should I use bags or ready-mix concrete?
Small projects can often be handled using concrete bags, while larger slabs and foundations may be more practical with ready-mix concrete delivered by a concrete supplier.