Concrete Calculator for Slabs — Estimate Volume & Material Needed

When you plan a slab or floor, guessing the amount of concrete never works right. It’s better to measure it properly. That’s what this concrete calculator for slabs does. You just type in the length, width, and thickness of your slab, and it tells you how much concrete you’ll need. It also breaks down how many bags of cement, and how much sand and gravel, go into the mix.

The calculator follows common mix ratios like 1:2:4 (cement : sand : gravel), which is what most people use for normal slab work. It saves you time on manual math and helps avoid buying too little or wasting too much. Whether you’re laying a small floor or pouring a full building slab, this concrete ratio calculator gives a quick idea of the materials needed for a strong, durable finish.