Quikrete Bag Calculator
Calculate how many bags of Quikrete you need for any pour: slabs, post holes, footings, and steps. Enter dimensions and select 80 lb, 60 lb, or 50 lb Quikrete mixes.
How to Use This Calculator
- Enter your dimensions — feet for lengths, inches for thickness.
- Adjust the options — waste percentage, bag size and your local concrete price.
- Read your results — volume, bags, weight and cost update live as you type.
The Formula
Bags of Quikrete = Total Volume (ft³) ÷ Bag Yield (ft³) Worked example: A 10 × 10 ft slab at 4 in = 33.3 ft³. In 80 lb Quikrete (0.60 ft³ yield): 33.3 ÷ 0.60 = 56 bags. With 10% waste: 62 bags.
This Quikrete calculator estimates bag requirements for all standard Quikrete products: Yellow Bag Original Concrete Mix, Red Bag Fast-Setting Concrete, and Quikrete 5000 High Early Strength. Each product formulation provides published yield factors that convert project dimensions into exact bag purchases.
Standard manufacturer bag yields: an 80 lb Quikrete bag yields approximately 0.60 cubic feet (45 bags make 1 cubic yard); a 60 lb bag yields 0.45 cubic feet (60 bags make 1 cubic yard); a 50 lb bag yields 0.375 cubic feet (72 bags make 1 cubic yard).
Mixing water guidelines: use approximately 3 quarts (2.8 liters) of clean water per 80 lb bag of standard Quikrete. Avoid adding excess water, which weakens compressive strength and causes surface dusting.
Frequently Asked Questions
Common questions about the quikrete bag calculator.
How many bags of Quikrete make a cubic yard?
You need 45 bags of 80 lb Quikrete, 60 bags of 60 lb Quikrete, or 72 bags of 50 lb Quikrete to yield one cubic yard (27 cubic feet) of mixed concrete.
How many bags of Quikrete for a 10x10 slab?
A 10 × 10 ft slab poured 4 inches thick has a volume of 33.3 cubic feet, requiring 56 bags of 80 lb Quikrete (approx. 62 bags with 10% waste).
How many bags of Quikrete per fence post?
For a standard 4x4 post set in an 8-inch diameter hole 24 inches deep, you need 2 bags of 50 lb Fast-Setting Quikrete or 1.5 bags of 80 lb concrete mix.
How many 80 lb Quikrete bags fit on a pallet?
A standard pallet holds 42 bags of 80 lb Quikrete (total weight: 3,360 lbs) or 56 bags of 60 lb Quikrete.
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