100% free · No sign-up · Works offline once loaded
Construction material calculators that get the order right the first time
BuildCalcHub turns your project dimensions into exact quantities — cubic yards, bags, and tons — for concrete, gravel, sand, mulch, and topsoil. Fast, free, and built on the same math suppliers use.
Pick your material
Concrete Calculator
Slabs, footings, and round columns — converted to cubic yards and the exact count of 40, 60, and 80 lb bags, with a built-in waste factor.
yd³80 lb bagsSlab · Footing · Column Open calculatorGravel & Sand Calculator
Driveways, pads, and beds — converted to cubic yards and tons using real densities for crushed stone, pea gravel, sand, and more.
yd³tons6 materials + custom Open calculatorMulch & Topsoil Calculator
Garden beds of any shape — converted to cubic yards and 1.5, 2, and 3 cu ft bag counts, with multi-bed totals for the whole yard at once.
yd³bagsMulti-bed mode Open calculatorThree steps to the right order
Measure your project
Length and width in feet, depth in inches — straight off the tape measure, no unit gymnastics required.
Pick shape & material
Slab or column, crushed stone or wet sand — each calculator applies the correct geometry and density automatically.
Read your ticket
Cubic yards for bulk orders, bag counts for the store run, tons for the quarry — updated live as you type.
Why estimate before you buy
Every material on this site is unforgiving in its own way. Run short on concrete mid-pour and the fresh batch won't bond to what's already setting — that seam, a cold joint, is a permanent weak line in your slab. Under-order gravel and you're paying a second delivery fee for the last half yard. Over-order mulch and a pallet of bags spends the summer in your garage. The fix is the same in every case: convert your real measurements into the units suppliers actually sell — cubic yards, bags, and tons — before money changes hands.
That conversion is exactly what BuildCalcHub does. Each calculator uses the standard volume geometry for its shapes, industry-standard bag yields and material densities, and a sensible waste allowance you control. Everything runs instantly in your browser: nothing to install, no account to create, and no data sent anywhere — your project dimensions never leave your device. The math behind every tool is written out in plain English on its page, with worked examples, so you can check our numbers against your own before you order.