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Concrete cost calculator

What your slab costs three ways: bags, ready-mix delivered, or a pro, as honest dated ranges.

Example sizes, change them. The answer updates as you type.

Project
= $100 to $800 three ways, full breakdown below
Your slab, three ways
  • A pro, installed $400-$800 labour and materials
  • Ready-mix delivered $100-$500 concrete only, typical range
  • DIY, 62 × 80 lb bags $352 concrete only
1.36 yd³national ranges, not quotes

Not yet fact-checkedMethod and sources

Your slab Drawing of your slab: 10 feet long, 10 feet wide and 4 inches thick. The thickness is drawn thicker than true scale. 10 ft 10 ft 4 in
Redraws as you typethickness exaggerated

A pro: about $400-$800. Concrete only: $100-$500 delivered, or $352 in bags.

How we worked it out

  1. 10 ft × 10 ft = 100 ft²
  2. 100 ft² × (4 in ÷ 12) = 33.3 ft³
  3. 33.3 ft³ + 10% extra = 36.7 ft³ ÷ 27 = 1.36 yd³
  4. A pro: 100 ft² × $4-$8 per ft² (patio or slab) = $400-$800
  5. Ready-mix: 1.36 yd³ × $110-$195 per yd³ + short-load fee $20-$165 (ask your supplier) = $100-$500
  6. Bags: 36.7 ft³ ÷ 0.6 ft³ per 80 lb bag = 62 bags (rounded up)
  7. DIY: 62 bags × $5.68 = $352

What a pro's price includes; what pushes it upDraft copy

(removal, reinforcement, stamped/coloured finish, access, region).

Ready-mixDraft copy

price per yard, short-load fees (flat or per yard, ask your supplier), why big cities cost more (ENR delivered prices, Jul 2026: New York $279, Dallas $111).

Worked examples

10 x 10 feet patio, 4 inches, plain finish

Length 10 ftWidth 10 ftThickness 4 inProject Patio or slabExtra for waste and spills 10%Price per 80 lb bag $5.68Your ready-mix quote per yd³ $0Remove old concrete noMesh or rebar no

A pro: about $400-$800. Concrete only: $100-$500 delivered, or $352 in bags.

Professionally installed
$400-$800
Ready-mix delivered (concrete only)
$100-$500
DIY with 80 lb bags (concrete only)
$352
80 lb bags
62
Concrete to order
1.36 yd³

20 x 20 feet driveway, 5 inches, old concrete removed, with rebar

Length 20 ftWidth 20 ftThickness 5 inProject DrivewayExtra for waste and spills 10%Price per 80 lb bag $5.68Your ready-mix quote per yd³ $0Remove old concrete yesMesh or rebar yes

A pro: about $3,600-$9,600. Concrete only: $700-$1,700 delivered, or $1,738 in bags.

Professionally installed
$3,600-$9,600
Ready-mix delivered (concrete only)
$700-$1,700
DIY with 80 lb bags (concrete only)
$1,738
80 lb bags
306
Concrete to order
6.79 yd³

Method and sources

Each calculator uses the standard formula and the manufacturer's own figures, such as bag yields, and rounds up where running short would cost you a trip. Every step is shown. Cost ranges come from named surveys with the date we checked them. Spot something wrong? Tell us and we will fix it and note the change.

  • National ranges, not quotes: prices vary a lot by area.
  • Installed ranges typically include labour and materials; what is bundled varies by contractor.
  • Ready-mix and bag prices cover concrete only, not tools, base or labour.
  • Under 10 cubic yards we add a short-load fee range: flat $50-$165 or $15-$43 per cubic yard; ask your supplier.
  • Installed prices assume typical thickness: up to 6 inches for patios, 8 inches for driveways.