Concrete Waste Factor Guide
Choose a practical concrete waste factor before ordering or buying bags.
Need the calculator? Calculate concrete volume, then add an appropriate waste factor. Concrete Calculator.
Practical guide
A waste factor covers uneven base, form variation, spillage, and measurement error. Small clean pours may only need a modest buffer; irregular work needs more.
Use this guide with the related calculator before ordering materials. Supplier specs, local code, soil, load, weather, and site prep can change the final amount.