Concrete Driveway Cost Calculator

Concrete driveway cost: how the estimate works

This concrete driveway cost calculator adds two lines. Material is cubic yards × your price per yard, where cubic yards = length × width × (depth in inches ÷ 12) ÷ 27. Labor is driveway area in square feet × a built-in rate of $6 per sq ft. The “You need” figure is the net concrete volume, with no waste added, and the cost figure is material plus labor.

Change the price box to your local ready-mix quote. The labor rate is fixed in this tool, so if your contractor quotes a different rate, adjust the labor line by hand: area × their rate.

The formula in plain words

1. Area = length × width.
2. Cubic feet = area × depth ÷ 12.
3. Cubic yards = cubic feet ÷ 27.
4. Material = cubic yards × price per yard.
5. Labor = area × $6.
6. Total = material + labor.

Notice which line moves with thickness. Labor depends on area only, so a thicker slab raises only the concrete line. Width and length raise both lines at once, which is why a wider driveway costs noticeably more than a thicker one of the same size.

Worked examples

1. The default: 20 ft × 10 ft at 4 in, $150 per yard

• Area: 200 sq ft
• Volume: 200 × 0.333 ÷ 27 = 2.47 yd³
• Material: 2.47 × $150 = $370.37
• Labor: 200 × $6 = $1,200.00
• Total: $1,570.37

2. Two-car pad: 24 ft × 24 ft, 4 in vs 5 in

Depth	Cubic yards	Material	Labor	Total
4 in	7.11	$1,066.67	$3,456.00	$4,522.67
5 in	8.89	$1,333.33	$3,456.00	$4,789.33

The extra inch adds 1.78 yards and $266.66, about 6% of the total. Many owners decide that is cheap insurance against cracking where heavy vehicles park.

Cost at default rates by driveway size

Size	Depth	Cubic yards	Estimated total
16 × 8 ft	4 in	1.58	$1,005
24 × 12 ft	4 in	3.56	$2,261
40 × 12 ft	4 in	5.93	$3,769
50 × 10 ft	4 in	6.17	$3,926
60 × 12 ft	5 in	11.11	$5,987

These figures use the $150 placeholder price and the built-in $6 labor rate. Your real costs will differ, so treat them as a way to compare sizes, not as quotes.

What else goes into a concrete driveway

Item	Why it matters	How to estimate
Gravel base	Supports the slab and drains water	Gravel base calculator
Reinforcement	Rebar or mesh helps hold cracks tight	Rebar calculator
Control joints	Planned cuts so cracks form in straight lines	A common rule: spacing in feet of 2–3 × the thickness in inches (8–12 ft for 4 in)
Removal of old surface	Breaking and hauling the old drive	Contractor quote
Permit and inspection	Required in many towns, especially at the curb cut	Local building department

How to measure

• Measure the finished slab from the garage to the street or sidewalk line.
• Split the apron. If the driveway flares at the street, run the straight part and the flare separately and add the totals.
• Check the curb cut. Many cities control the apron width and thickness where the driveway meets the road. Ask before you pour.
• Enter the slab thickness, not the thickness of slab plus base.

Mistakes to avoid

• Treating the total as the final bill. Base, reinforcement, forms, and removal can add a large share on top. Get a line-item quote.
• Pouring on soft or wet soil. A thick slab on poor ground still cracks. Compact the base first.
• Ordering the exact volume. Add a margin when you call the plant.
• Skipping the cure. Keep fresh concrete moist and off-limits to cars for the period your contractor recommends, often around a week for cars.

Compare materials with the asphalt driveway cost calculator, or work out the slab volume alone with the concrete slab calculator.