Concrete Bags Formula:
From: | To: |
Definition: This calculator estimates the number of 90 lb Quikrete concrete bags needed based on the total volume required and the yield per bag.
Purpose: It helps DIYers and contractors determine how many bags of concrete mix to purchase for their projects.
The calculator uses the formula:
Where:
Explanation: The total volume is divided by the yield per bag to determine how many bags are needed.
Details: Proper calculation ensures you purchase the right amount of concrete mix, avoiding both shortages and costly overages.
Tips: Enter the total concrete volume in cubic feet and the yield per bag (default 0.68 ft³/bag). All values must be > 0.
Q1: What's the standard yield for a 90 lb Quikrete bag?
A: Typically 0.68 cubic feet per bag when mixed with the recommended amount of water.
Q2: How do I find the concrete volume needed?
A: Use our Concrete Volume Calculator or multiply length × width × depth (in feet).
Q3: When would I change the yield value?
A: Only if using a different product with a known different yield per bag.
Q4: Should I round up the result?
A: Yes, always round up to the nearest whole bag since you can't purchase partial bags.
Q5: Does this include waste or overage?
A: No, consider adding 5-10% to the calculated number of bags for project contingencies.