Free concrete calculator
Concrete Calculator for Contractors
This calculator estimates concrete volume, yards to order, material cost, labor cost, and target price for small concrete jobs.
Use it for pads, walkways, slabs, post footings, equipment bases, fence work, and repair pours before final measurements and site conditions are confirmed.
Estimate concrete volume and job price
Enter length, width, depth, waste, cost per cubic yard, labor hours, labor rate, overhead, and target margin to calculate material needs and price.
How it works
How concrete quantity is calculated
The calculator converts length, width, and depth into cubic feet, converts to cubic yards, adds waste, then estimates material and labor cost.
1
Calculate cubic feet
Length times width times depth gives the volume of the pour.
2
Convert to cubic yards
Cubic feet are divided by 27 to estimate concrete yards.
3
Add waste and margin
Waste, labor, overhead, and target margin produce a planning price.
Field example
Example: equipment pad estimate
A contractor can use the calculator to plan a small pad while still documenting site prep, forms, reinforcement, and access separately.
A shallow slab may require less concrete than expected, but setup and finishing time still matter.
Waste helps cover uneven subgrade, spillage, and ordering tolerance.
Final scope should include excavation, base material, reinforcement, forms, finish, and cleanup.
Common mistakes
What to double-check before using the result
Mixing inches and feet
Depth should be converted correctly so the yardage is not overstated or understated.
Forgetting subgrade work
Excavation, base prep, compaction, forms, and reinforcement can drive the real job cost.
Ordering exact volume
Small pours often need waste or buffer so the crew does not run short.
After the calculation
Turn the result into cleaner field work
Confirm site access
Attach notes about parking, wheelbarrow distance, pump needs, and cleanup.
Add materials
List forms, gravel, rebar, wire mesh, anchors, and curing supplies.
Create the work order
Send the crew with measurements, pour timing, and finish expectations.
Related resources
Related templates
FAQ
Questions service teams ask about this tool
How many cubic feet are in one cubic yard?
One cubic yard contains 27 cubic feet.
Should I add waste to concrete orders?
Yes. Many contractors add a small buffer for uneven ground, spillage, and ordering tolerance.
Does this include reinforcement?
No. Reinforcement, forms, base material, finishing, and site prep should be added separately to the estimate.