MC360 // Concrete & Masonry
POUR WITH CONFIDENCE —ORDER THE EXACTYARDAGE.
How much concrete do I need? It is the question that decides whether the pour finishes in one shot. Enter your slab, footing or driveway dimensions and get cubic yards, bag counts and truckloads — with overage calculated before the truck is booked.
The Instrument
The Concrete Calculator, up close
Inputs
Outputs
Opens the live calculator on matcalc360.pro
Run your own numbersProcess
Three steps. Zero guesswork.
Enter your measurements
Length, width, depth, pitch — the numbers you already pace off on site. No blueprints, no signup, no spreadsheet.
Calculate materials
The calculator applies the right formulas, density factors and waste allowances for your specific material.
Get your results
Squares, yards, tons, boards or sheets — a clean order list you can hand straight to the supplier.
Field Guide
CONCRETE MATH, FROM FORMS TO TRUCK
Volume is length × width × depth
Concrete volume is simple multiplication with one trap: units. Slab thickness is measured in inches, everything else in feet. Convert thickness to feet, multiply the three dimensions for cubic feet, then divide by 27 to get cubic yards — the unit ready-mix is sold in.
- Convert inches to feet first (4 in = 0.333 ft)
- Cubic feet ÷ 27 = cubic yards
- Footings and columns use the same formula
Bags vs. ready-mix
One cubic yard of concrete takes about 45 bags of 80-lb mix or 60 bags of 60-lb mix. Bagged concrete makes sense up to roughly half a yard; beyond that, a ready-mix truck is cheaper, faster and far more consistent. The calculator shows both so you can decide on the spot.
- ≈ 45 × 80-lb bags per cubic yard
- ≈ 60 × 60-lb bags per cubic yard
- Ready-mix wins above ~0.5 cu yd
The overage that saves the pour
Subgrades are never perfectly level, forms flex, and spillage happens. Order 5–10% extra on slabs and up to 15% on footings dug into uneven ground. Running short means a cold joint or an emergency short-load fee — both cost more than the extra half yard.
- 5–10% overage on slabs
- Up to 15% on excavated footings
- Short loads trigger surge fees
Keep calculating
ONE NUMBER THAT MATTERS
27
cubic feet in every cubic yard — the conversion behind every concrete order
Related Calculators
Keep the takeoff going
FAQ
Questions from the field
Straight answers on units, waste factors and ordering — the details that decide whether the job finishes on the first delivery.
Ready when you are
STOP GUESSING.START BUILDING.
Free. No signup. Built for the jobsite.