ConcreteQty

Premixed bag estimator

Concrete Bag Calculator

See 40, 50, 60, and 80 lb bag counts at the same time, rounded up with waste included.

Project

LENGTHWIDTHTHICKNESS

Formula

How the result is calculated

Bag count = concrete volume with waste ÷ published yield per bag, rounded up to a whole bag.

Worked example

Check the order logic

ConcreteQty uses the published QUIKRETE Concrete Mix yields: 0.30, 0.375, 0.45, and 0.60 ft³ for 40, 50, 60, and 80 lb bags.

Assumptions

Waste and supplier rounding stay editable

The launch defaults are 10% waste and upward rounding to 0.25 yd³ or 0.10 m³. Open “Adjust assumptions and costs” to use your supplier’s increment, actual prices, density, truck capacity, or product bag yield.

Questions

What this calculator does

Are bag counts rounded up?

Always. A partial bag becomes one whole bag.

Can I add bag prices?

Yes. Open assumptions and costs to enter the price for each bag size.

Do all brands have the same yield?

No. Check the product label and adjust planning when the product differs from the cited yield.

Bag yields follow the cited manufacturer data. See sources and review dates.