Concrete Pad Cost Calculator
Enter length, width, thickness, and concrete price to get square feet, cubic yards, ready-mix material cost, and installed price ranges immediately. The calculator separates a basic slab from a typical full installation so you can compare contractor quotes on the same scope.
- Cubic yards × the price you enter.
- Does not include labor, base prep, or finishing.
- Useful for understanding the material floor.
- Usually includes labor, forms, placement, and cleanup.
- May also include site prep, reinforcement, and access costs.
- This is the number homeowners usually compare first.
The two numbers answer different questions, so the calculator shows both side by side.
Estimate Your Concrete Pad Cost
Enter length, width, thickness, and a local ready-mix price to compare material, labor, and installed ranges.
Standard residential pad: 4 inches
Default: $150/yd³ (2026 avg)
Area calculation, ready-mix planning, and a basic-versus-typical installation comparison.
Excavation, gravel base, demolition, pumping, permits, reinforcement, and structural engineering unless a contractor says otherwise.
Planning Note: excavation, grading, drainage, and base work vary by site and access.
Planning Note: mesh, rebar, thickened edges, broom finish, stain, or stamping change the total and must be confirmed locally.
Planning Note: simple pads are usually scheduled around site prep, pour day, and curing. Consult a local contractor for timing.
It combines a cubic-yard material calculation with national per-square-foot planning ranges so material cost does not get confused with installed cost.
Angi, HomeGuide, and NRMCA planning references. Ready-mix pricing uses the value you entered.
2026-07-04
How this is calculated
- Volume (yd³) = (Length × Width × Thickness/12) ÷ 27 = 4.94
- Concrete material = Volume × $150/yd³ = $741 (ready-mix concrete only)
- Labor estimate = 400 sq ft × $3–$5/sq ft = $1,200–$2,000
- Basic slab = 400 sq ft × $4–$8/sq ft = $1,600–$3,200
- Typical full installation = 400 sq ft × $6–$12/sq ft = $2,400–$4,800
Concrete material is only part of the total. The basic range follows Angi's 2026 slab guide; the typical installed range follows HomeGuide's 2026 guide and allows for ordinary materials and labor. Site prep, access, reinforcement, finish, and local minimum charges can move a quote outside either range.
Planning note. Actual cost depends on location, site conditions, labor, access, and contractor pricing.
Get Local Estimate →Understanding Your Estimate
Concrete material
Cubic yards multiplied by your local ready-mix price. It does not include gravel, reinforcement, forms, labor, or delivery add-ons.
Basic slab
A $4–$8 per sq ft planning range for straightforward work on a prepared and accessible site.
Full installation
A $6–$12 per sq ft range for ordinary materials and labor. Complex site work or finishes may cost more.
Average Concrete Pad Cost by Size
Size examples use HomeGuide 2026 U.S. installed cost data.
| Project / Size | Low | High | Typical Use |
|---|---|---|---|
| Small pad (6×6, 36 sq ft) | $300 | $650 | Shed base, AC pad |
| 10x10 pad (100 sq ft) | $600 | $1,200 | Shed / small patio |
| 12x12 pad (144 sq ft) | $860 | $1,700 | Patio / gazebo |
| 20x20 pad (400 sq ft) | $2,400 | $4,800 | Garage / large patio |
| XL pad (30×40, 1,200 sq ft) | $7,200 | $14,400 | Barn, large driveway |
Estimate only. Scope, location, site conditions, access, finish, and contractor minimums can move a quote outside these ranges.
How the Calculator Works
1. Area: length × width = square feet.
2. Volume: (length × width × thickness in feet) ÷ 27 = cubic yards.
3. Ready-mix material: cubic yards × the local concrete price entered.
4. Installed ranges: square feet × $4–$8 for a basic slab and × $6–$12 for a typical full installation.
Planning estimate only. Confirm thickness, base, reinforcement, permits, and structural requirements locally before ordering concrete.
Why Material ≠ Installed Cost
Material
Ready-mix is only the slab material. It does not include labor, excavation, forms, or cleanup.
Installed
A contractor quote usually includes people, tools, delivery coordination, and the site work needed to place the slab.
Minimum charges
Small pads can look expensive because delivery and crew minimums do not shrink as fast as the slab area.
This is a planning diagram. A contractor or engineer may specify different layers for your site.
Construction Flow
Evidence Cards
Basic slab pricing
- Source
- Angi concrete slab guide
- Used For
- Basic $4 to $8 per sq ft slab range and quote comparison language
- Last Updated
- 2026-04-16
- Confidence
- High
Typical installed pricing
- Used For
- Typical installed $6 to $12 per sq ft range and 10x10 / 12x12 / 20x20 examples
- Last Updated
- 2026-02-03
- Confidence
- High
Technical guidance
- Used For
- Slab terminology, joints, curing, and homeowner explanation
- Last Updated
- Accessed 2026-07-04
- Confidence
- High
Frequently Asked Questions
What does the concrete pad calculator include?
It estimates square feet, cubic yards, ready-mix material cost, a basic slab range, and a typical full-installation range. It does not automatically add demolition, pumping, permits, unusual access, drainage, or structural engineering.
Why are there two installed cost ranges?
The $4–$8 per sq ft range is a starting point for a basic slab. The $6–$12 range is a broader planning range for a typical installation with ordinary materials and labor. The scope of a real contractor quote determines which comparison is more useful.
How much extra concrete should I order?
Contractors commonly allow extra material for uneven excavation, spillage, and measurement differences. The right allowance depends on the job, supplier minimums, and site conditions, so confirm the final order with the ready-mix supplier or contractor.
Can I use this estimate as a contractor quote?
No. It is a national-average planning tool. Local labor, concrete delivery, site access, soil, permits, finish, reinforcement, and contractor minimum charges can move the final price outside the estimate.
Get a Local Concrete Pad Estimate
Request a local estimate based on your project and location.