Ready-mix concrete bags calculator for DIY projects. Calculate how many 40lb, 60lb, or 80lb concrete bags you need.
Calculator Settings
Feet & Inches
Meters
Select your preferred measurement unit for your project.
40 lb Bag
0.30 ft³ per bag
60 lb Bag
0.45 ft³ per bag
80 lb Bag
0.60 ft³ per bag
Select the size of ready-mix concrete bags you plan to use.
Slab / Patio
Footing
Post Hole
Wall
Steps
Custom
Select the type of project you're working on.
Slab Dimensions
feet
feet
inches
Nos.
$
$
$
Enter current prices for cost estimation. Leave as is for average market prices.
Bag Yield Information: • 40 lb bag: Yields approximately 0.30 cubic feet • 60 lb bag: Yields approximately 0.45 cubic feet • 80 lb bag: Yields approximately 0.60 cubic feet • Always buy 10% extra to account for spillage and uneven surfaces
Tips for Using Ready-Mix Concrete: • Mix only what you can use in 30-45 minutes • Add water gradually - don't make it too wet • For large projects, consider ordering ready-mix concrete by the truck • Always wear protective gloves and eyewear • Store unused bags in a dry place
Shopping Tip: For projects requiring more than 50 bags, consider ordering ready-mix concrete delivered by truck. It's often more economical and less labor-intensive than mixing many bags.