Which concrete calculator should I use?
Start with the shape you are pouring. A good estimate uses the dimensions that match the project, then adds an allowance for the conditions at the site.
Slab Calculator
Use the Slab Calculator for a patio, driveway, sidewalk, garage floor, or shed pad. It uses length, width, and slab thickness, so it is the right starting point for a flat rectangular concrete pad.
Worked example, waste guidance, and a pre-order checklist.
Footing Calculator
Use the Footing Calculator for a foundation trench, wall footing, or strip footing. It is built for long rectangular pours where excavation width and depth can vary from the plan.
Worked example, waste guidance, and a pre-order checklist.
Column Calculator
Use the Column Calculator for a post hole, Sonotube, pier, or round column. It calculates a circular pour from diameter and depth rather than a rectangular footprint.
Quick answers
Does the result include waste?
Yes. Each calculator shows net volume and a waste-adjusted result. Start with the suggested allowance, then adjust it for uneven excavation, irregular edges, or field experience.
Can I use feet for length and inches for thickness?
Yes. Each tool lets you choose units separately, which is useful for common slab and footing measurements.
Is this a ready-mix ordering quote?
No. The results are planning estimates. Confirm final quantities, mix design, delivery requirements, and pricing with the supplier or qualified project professional.