Slab 1
Length: — ft · Width: — ft · Thickness: — in
Buying method comparison
Compare the order quantity, bag workload, and your actual supplier fees in one result.
Project
Formula
Both choices use the same measured volume and waste allowance. Ready-mix cost adds price per yard, delivery, short-load, pump, and tax. Bag cost multiplies rounded bag count by the price entered.
Worked example
For small volumes bags may be practical. For larger volumes, the number and weight of bags make the workload visible before purchase.
Assumptions
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
No. Enter real quotes so the comparison reflects your supplier.
No. Add each fee shown in the quote.
No. Both methods stay visible; any convenience highlight explains its reason.
Related tools
Concrete bag calculator · Ready-mix vs. bags · Concrete cost calculator
Bag yields follow the cited manufacturer data. See sources and review dates.