Why estimate before you order?
Bulk materials are sold by the cubic yard or by the ton, and delivery fees make second trips expensive. Ordering 10% too little concrete can mean a cold joint in the middle of your slab; ordering a yard too much gravel means moving half a ton of stone by hand. A two-minute estimate protects both your budget and your back.
Each calculator explains the formula it uses and cites its sources, so you can check the math yourself — and every result includes the units suppliers actually quote: cubic yards, tons, and bags.
Guides
How Many Bags of Concrete in a Cubic Yard?
Bag counts for 40–80 lb bags, with worked examples and a chart.
Mulch Coverage Chart
How much one cubic yard of mulch covers at 1–4 inch depths.
Frequently asked questions
Are these calculators free to use?
Yes. Every calculator on YardCalc is completely free, with no sign-up. The site is supported by advertising.
How accurate are the results?
The volume math is exact geometry. Bag counts use published manufacturer yields, and material weights use standard industry densities. Real-world quantities vary with waste, compaction, and moisture, so we show planning estimates and recommend confirming with your supplier.
Do the calculators work in metric units?
Yes. You can enter dimensions in feet, inches, meters, or centimeters, and results include cubic meters and metric tonnes alongside US units.