For example, a 20 × 20-foot driveway is 400 square feet. At 4 inches thick, it requires about 4.94 cubic yards, or approximately 5.4 cubic yards after adding 10% extra.

Professionally installed concrete driveways commonly cost around $8 to $20 per square foot in the United States, although a plain, accessible project may cost less and decorative or difficult installations may cost more.

How to Use the Concrete Driveway Calculator

Enter the measurements and project details requested by the calculator.

1. Enter the Driveway Length

Measure the driveway from the street or sidewalk edge to the garage, parking area, or end of the paved surface.

Do not forget to include:

The driveway apron
Parking extensions
Turnaround areas
Side parking pads
Widened sections near the garage

2. Enter the Width

Measure the actual paved width rather than estimating it from the number of vehicles.

If the width changes, divide the driveway into separate rectangular sections and calculate each section individually.

3. Select the Concrete Thickness

A 4-inch slab is commonly used for passenger cars and light residential traffic. Areas that regularly support trucks, RVs, trailers, delivery vehicles, or concentrated wheel loads may require 5 or 6 inches, stronger reinforcement, or an engineered design. Industry paving guidance identifies 4 inches as a minimum for light vehicle parking and driveways, with greater thickness recommended for truck traffic.

4. Add a Waste Allowance

Concrete calculations assume perfectly level excavation and exact dimensions. Real projects involve uneven subgrades, forms that move slightly, spillage, and variations in slab thickness.

A 5% to 10% allowance is suitable for many straightforward rectangular pours. Use a larger allowance for irregular layouts, uneven ground, thickened edges, or difficult access.

5. Enter Your Local Price

Depending on the calculator settings, enter either:

Concrete price per cubic yard
Concrete price per cubic metre
Installed price per square foot
Installed price per square metre

Do not confuse the ready-mix material price with the complete installation price. Ready-mix concrete is only one part of the total project.

Concrete Driveway Calculation Formula

A driveway concrete calculator performs three main calculations.

Driveway Square Footage

For a rectangular driveway:

Square footage = Length × Width

Example:

40 ft × 20 ft = 800 sq ft

For multiple sections:

Total area = Section 1 area + Section 2 area + Section 3 area

Triangular Section

Area = Base × Height ÷ 2

Circular Turnaround

Area = π × Radius²

Semicircular Section

Area = π × Radius² ÷ 2

For curved or irregular driveways, divide the layout into simple shapes, calculate each area, and add the results.

Concrete Volume in Cubic Feet

Convert the selected thickness from inches to feet:

Thickness in feet = Thickness in inches ÷ 12

Then calculate volume:

Cubic feet = Square footage × thickness in feet

Example for an 800-square-foot driveway poured 4 inches thick:

4 inches ÷ 12 = 0.333 feet
800 × 0.333 = 266.67 cubic feet

Concrete Volume in Cubic Yards

Ready-mix concrete in the United States is normally ordered by cubic yard.

There are 27 cubic feet in one cubic yard:

Cubic yards = Cubic feet ÷ 27

The shorter driveway formula is:

Cubic yards = Square footage × thickness in inches ÷ 324

For the 800-square-foot example:

800 × 4 ÷ 324 = 9.88 cubic yards

Add 10%:

9.88 × 1.10 = 10.86 cubic yards

The practical order would be approximately 11 cubic yards, subject to confirmation by the concrete supplier or contractor.

Concrete quantity is based on length, width, and depth, with the resulting cubic footage divided by 27 to convert it into cubic yards.

Metric Formula

For measurements in metres:

Concrete volume in cubic metres = Length × Width × thickness in metres

For a 100 mm slab:

100 mm ÷ 1,000 = 0.10 metres

Example:

12 m × 5 m × 0.10 m = 6 cubic metres

After adding 10%:

6 × 1.10 = 6.6 cubic metres

Concrete Needed by Driveway Size

The table below assumes:

A 4-inch concrete slab
A 10% order allowance
An installed U.S. planning range of $8 to $20 per square foot

Driveway Size	Square Footage	Concrete Before Waste	Suggested Quantity With 10%	Estimated Installed Cost
10 × 20 ft	200 sq ft	2.47 yd³	2.72 yd³	$1,600–$4,000
12 × 20 ft	240 sq ft	2.96 yd³	3.26 yd³	$1,920–$4,800
20 × 20 ft	400 sq ft	4.94 yd³	5.43 yd³	$3,200–$8,000
20 × 30 ft	600 sq ft	7.41 yd³	8.15 yd³	$4,800–$12,000
24 × 40 ft	960 sq ft	11.85 yd³	13.04 yd³	$7,680–$19,200
30 × 50 ft	1,500 sq ft	18.52 yd³	20.37 yd³	$12,000–$30,000
40 × 50 ft	2,000 sq ft	24.69 yd³	27.16 yd³	$16,000–$40,000

These figures are preliminary estimates. Local labor rates, site conditions, reinforcement, demolition, finish, drainage, permits, and minimum delivery charges can substantially change the final price.

Concrete Driveway Cost Per Square Foot

A concrete driveway cost calculator normally uses the driveway’s square footage as the main pricing unit.

A reasonable 2026 U.S. planning range is:

Driveway Type or Finish	Approximate Installed Cost
Basic plain concrete	$6–$8 per sq ft
Broom or textured finish	$8–$12 per sq ft
Exposed aggregate	$8–$12 per sq ft
Stamped concrete	$12–$18 per sq ft
Detailed stained or saw-cut finish	$18–$20+ per sq ft

HomeAdvisor reports an overall average range of approximately $8 to $20 per square foot, with plain finishes near the lower end and decorative work toward the upper end.

Your local cost may fall outside these figures. A short, accessible driveway over stable soil usually costs less per square foot than a steep, curved replacement project with poor drainage.

What Is Included in a Concrete Driveway Estimate?

A complete concrete driveway estimate may include more than the concrete itself.

Site Layout and Excavation

The contractor marks the driveway, removes soil, establishes the finished elevation, and prepares the required slope.

Deep excavation, difficult soil, tree roots, buried structures, or restricted machinery access increase the price.

Existing Driveway Removal

Replacement projects may require:

Saw cutting
Breaking existing concrete
Machine loading
Hauling
Disposal or recycling fees

Concrete removal alone commonly costs several dollars per square foot, depending on thickness, reinforcement, access, and disposal conditions. Thumbtack reports a broad national removal range of approximately $3 to $4.50 per square foot.

Compacted Base

A stable, uniformly compacted base helps support the slab and reduce settlement.

The required material and depth depend on:

Soil type
Drainage
Climate
Vehicle loading
Local codes
Existing subgrade condition

The Portland Cement Association emphasizes uniform support and proper compaction beneath concrete pavement rather than simply adding an unnecessarily thick layer of loose base material.

Forms

Forms establish the driveway shape, thickness, elevation, and edges.

Curves, multiple widths, decorative borders, and complex aprons require more formwork than a simple rectangle.

Reinforcement

The project may use:

Steel rebar
Welded wire reinforcement
Fibres
A combination specified by the designer or contractor

Reinforcement can help control crack width and maintain slab integrity, but it does not replace proper base preparation, slab thickness, joint placement, finishing, and curing.

Ready-Mix Concrete

Concrete material is commonly priced per cubic yard. Current national planning figures place standard ready-mix at roughly $120 to $210 per cubic yard, depending on the mixture, strength, location, and supplier.

Small-load fees, short-load charges, delivery distance, Saturday delivery, admixtures, fibres, and concrete pumping may be charged separately.

Placement and Finishing

Labor may include:

Moving concrete from the truck
Screeding
Floating
Edging
Broom finishing
Decorative finishing
Cutting or forming joints
Cleanup

A concrete truck reaching the property does not mean the mixture will politely spread and finish itself. Sadly, construction materials continue refusing to automate the convenient parts.

Drainage

Drainage costs may include:

Correcting the driveway slope
Channel drains
Catch basins
Underground drainage pipe
Swales
Curb modifications

Poor drainage can direct water toward the garage, foundation, neighboring property, or public sidewalk.

Permits and Inspections

Requirements vary by city and county. Work affecting the public sidewalk, curb, apron, road shoulder, or drainage system may require a permit even when the private driveway does not.

How Thickness Changes Concrete Quantity

Increasing thickness has a direct effect on concrete volume.

For a 600-square-foot driveway:

Thickness	Concrete Before Waste	With 10% Allowance
4 inches	7.41 yd³	8.15 yd³
5 inches	9.26 yd³	10.19 yd³
6 inches	11.11 yd³	12.22 yd³

A 6-inch slab requires 50% more concrete volume than a 4-inch slab covering the same area.

Do not choose thickness only by comparing concrete prices. Vehicle weight, subgrade support, freeze-thaw conditions, reinforcement, local regulations, and joint design all matter.

Is a 4-Inch Concrete Driveway Thick Enough?

A 4-inch slab is commonly suitable for a properly prepared residential driveway used by passenger cars, SUVs, and light pickup trucks. Light-vehicle paving specifications commonly identify 4 inches as the minimum thickness.

Consider increasing the thickness or obtaining an engineered specification when the driveway will regularly support:

Large RVs
Heavy-duty trucks
Dumpsters
Commercial delivery vehicles
Loaded trailers
Heavy equipment
Repeated turning at the same location
Poor or expansive soil

Extra thickness is often valuable near the street apron, garage entrance, slab edges, and areas where heavy vehicles turn or stop.

Local driveway-apron requirements can also be thicker than the private portion of the driveway.

Control Joints and Driveway Panels

Concrete naturally shrinks as it dries. Properly placed joints encourage cracks to occur at planned locations rather than randomly across the visible surface.

The National Ready Mixed Concrete Association recommends joint spacing of approximately 24 to 36 times the slab thickness. For a 4-inch slab, spacing of about 10 feet is given as an example. Panels should be square or nearly square, and long, narrow or L-shaped panels should be avoided.

A quantity calculator does not design the joint layout. Contractors should consider:

Driveway width
Slab thickness
Curves and corners
Garage foundations
Drain locations
Columns and fixed objects
Changes in driveway width

Concrete Driveway Replacement Cost Calculator

A replacement estimate should account for both removal and new construction.

A simple formula is:

Replacement cost = Removal and disposal + site preparation + new driveway installation + additional work

For a 600-square-foot driveway:

Removal at $3 to $4.50 per sq ft: $1,800 to $2,700
New installation at $8 to $20 per sq ft: $4,800 to $12,000
Preliminary combined range: $6,600 to $14,700

That estimate may still exclude:

Major grading
Drainage improvements
Permit fees
Curb or sidewalk reconstruction
Utility relocation
Soil stabilization
Decorative borders
Concrete pumping

Angi reports that concrete driveway replacement commonly falls within an $8 to $20 per-square-foot range, but project-specific demolition and preparation requirements can move the total higher.

Ask contractors to separate removal, disposal, base preparation, concrete, reinforcement, finishing, and drainage in the quotation. A single mystery number is easier to write and much harder to compare.

Concrete Driveway Cost Calculator for Canada

Canadian prices should be entered in Canadian dollars rather than converting a U.S. national average.

A current Canadian planning guide places a basic broom-finish concrete driveway at approximately CA$12 to CA$20 per square foot, while decorative or exposed-aggregate work may range from CA$18 to CA$50 or more per square foot.

Canadian costs vary significantly because of:

Province and city
Shorter seasonal construction windows
Freeze-thaw requirements
Excavation depth
Base preparation
Concrete specifications
Disposal charges
Local labor rates
Heated driveway systems
Site accessibility

For a 600-square-foot basic driveway:

600 × CA$12 to CA$20 = CA$7,200 to CA$12,000

This is a preliminary planning estimate, not a contractor quote.

Concrete Parking Lot Cost Estimates

The same area and volume formulas can be used for a small concrete parking area:

Area = Length × Width

Concrete volume = Area × thickness ÷ 324

However, a commercial concrete parking lot should not be priced as an oversized residential driveway.

Parking lots may require:

Engineered pavement thickness
Separate car and truck traffic zones
Curbs and gutters
Stormwater infrastructure
ADA-accessible parking
Pavement markings
Light pole bases
Bollards
Heavy-duty entrance aprons
Traffic-control plans
Permits and inspections

Use a concrete parking lot cost calculator for early budgeting only. Final pavement thickness, joints, reinforcement, drainage, and subgrade requirements should come from the project plans or a qualified pavement professional.

Crushed Concrete Driveway Calculator

Crushed or recycled concrete is calculated by volume rather than concrete slab volume.

Use:

Cubic yards = Square footage × compacted depth in inches ÷ 324

Example for a 1,000-square-foot driveway with a 6-inch compacted layer:

1,000 × 6 ÷ 324 = 18.52 compacted cubic yards

The amount delivered must be higher than the final compacted volume because loose aggregate reduces in volume during compaction.

Do not use a universal cubic-yard-to-ton conversion without checking the supplier’s density. Moisture, particle size, contamination, and material source affect weight.

A crushed concrete driveway generally costs less than a poured slab but will require periodic grading, filling, and compaction.

Gravel Driveway Cost Versus Concrete

Gravel and crushed concrete use a different installation system from poured concrete.

A gravel driveway estimate should account for:

Excavation
Geotextile fabric where needed
Base aggregate
Surface aggregate
Compaction
Edging
Delivery
Drainage
Future replenishment

Concrete costs more initially but provides a hard, permanent surface. Gravel is less expensive and easier to repair, but it can develop ruts, potholes, weeds, and displaced aggregate.

Use a dedicated gravel driveway cost calculator when comparing materials. Do not simply replace the concrete price with a gravel price while keeping all other assumptions unchanged.

DIY Concrete Driveway Cost

A DIY estimate should include more than ready-mix concrete.

Possible costs include:

Excavation equipment
Aggregate base
Plate compactor
Forms and stakes
Reinforcement
Concrete delivery
Short-load charges
Concrete pump or buggy
Screeds and floats
Edging and joint tools
Curing materials
Protective equipment
Disposal
Additional labor

A driveway must usually be placed and finished continuously. Ordering too little concrete can create an unwanted cold joint, while ordering far too much produces an expensive pile of rapidly hardening regret.

Professional installation may be justified for large pours, slopes, drainage-sensitive sites, heavy vehicle loads, decorative finishes, or projects requiring permits.

Common Concrete Driveway Estimating Mistakes

Measuring Only the Main Rectangle

Include aprons, flares, parking pads, turnarounds, walkways poured with the driveway, and widened garage entrances.

Forgetting the Thickness Conversion

Do not multiply square feet directly by inches. Convert thickness to feet or use the cubic-yard shortcut:

Area × inches ÷ 324

Ordering the Exact Calculated Volume

The mathematical result does not include uneven excavation or placement loss. Include a suitable allowance.

Treating Material Cost as Total Cost

Concrete delivery is not the same as excavation, base preparation, reinforcement, placement, finishing, curing, and cleanup.

Ignoring Demolition

Replacement costs can be substantially higher than new construction on an empty prepared site.

Using a National Rate as a Contractor Quote

The cost estimator provides a budget range. Local quotations determine the actual price.

Ignoring Drainage

A low per-square-foot bid becomes less impressive when the completed driveway directs rainwater into the garage.

Frequently Asked Questions

How much would a 20 × 20 driveway cost?

A 20 × 20-foot driveway covers 400 square feet.

At a broad installed range of $8 to $20 per square foot, the estimate is:

400 × $8 to $20 = $3,200 to $8,000

HomeAdvisor lists a more typical 2026 range of approximately $3,200 to $6,000 for a 20 × 20 concrete driveway, with an average near $4,600. Decorative finishes, difficult access, demolition, or major site preparation can push the cost higher.

At 4 inches thick, the driveway requires:

4.94 cubic yards before waste
Approximately 5.43 cubic yards with a 10% allowance

How much would a 1,500-square-foot concrete driveway cost?

Using $8 to $20 per square foot:

1,500 × $8 to $20 = $12,000 to $30,000

At 4 inches thick, it requires:

18.52 cubic yards before waste
Approximately 20.37 cubic yards with 10% extra

A replacement project may also require demolition, hauling, grading, base repair, drainage, and permits.

How much does it cost to pave a 2,000-square-foot driveway?

For a concrete driveway at $8 to $20 per square foot:

2,000 × $8 to $20 = $16,000 to $40,000

At 4 inches thick, the concrete quantity is:

24.69 cubic yards before waste
Approximately 27.16 cubic yards with 10% extra

If “pave” refers to asphalt, gravel, or pavers, use the cost range and material calculator for that surface. They are not interchangeable.

How do I figure out how much concrete I need for my driveway?

Measure the length and width in feet, calculate the square footage, and enter the slab thickness.

Use:

Cubic yards = Length × Width × thickness in inches ÷ 324

Then add a suitable waste allowance.

Example:

30 × 20 × 4 ÷ 324 = 7.41 cubic yards

With 10% extra:

7.41 × 1.10 = 8.15 cubic yards

Is 4 inches of concrete thick enough for a driveway?

Four inches is commonly adequate for a properly constructed residential driveway carrying passenger cars and light trucks. Heavy trucks, RVs, trailers, poor soil, frequent turning, or local code requirements may justify a 5- or 6-inch slab or an engineered pavement design.

The slab also needs suitable base support, drainage, jointing, finishing, and curing. Thickness cannot rescue badly prepared ground from the consequences of human optimism.

What is poor man’s concrete?

“Poor man’s concrete” is an informal term rather than a recognized concrete specification.

It may describe:

Compacted crushed concrete
Soil mixed with cement and water
Cement-treated aggregate
A dry cement and aggregate surface used as a low-cost paving method

Proper soil-cement is an engineered mixture of pulverized soil, measured portland cement, and water that is compacted and cured. The Portland Cement Association distinguishes this controlled process from simply spreading dry cement over soil or gravel.

For a vehicle driveway, use a tested soil-cement design, compacted recycled concrete, gravel, asphalt, or a properly constructed concrete slab. Randomly sprinkling cement powder over dirt is not a reliable substitute.

How much does it cost to have a 20 × 20 concrete slab poured?

A 20 × 20 slab covers 400 square feet.

For a vehicle-bearing concrete driveway, a reasonable installed estimate is approximately $3,200 to $8,000, with straightforward plain installations often falling closer to the lower or middle part of that range.

A non-vehicle patio, shed slab, or simple interior slab may use different base, thickness, reinforcement, and finishing requirements, so its cost should not automatically be treated as a driveway price.

What does Coca-Cola do to concrete?

Coca-Cola is acidic and may loosen some light mineral deposits or cause mild surface etching if it remains on concrete. Phosphoric-acid solutions are used in purpose-made concrete etching products, but those products use controlled formulations and safety instructions.

Coca-Cola is not a dependable concrete cleaner. Its sugar and coloring can leave a sticky residue, attract insects, and create another stain to clean. A professional masonry-cleaning manufacturer specifically advises that pouring soda on an oil stain is unlikely to provide a proper solution.

Use a cleaner designed for the specific stain and test it on a small hidden area.

What is the 90-minute rule for concrete, and why is it important?

Historically, the 90-minute rule required ready-mix concrete to be fully discharged within approximately 90 minutes after mixing began. The intention was to limit excessive loss of workability and uncontrolled changes in fresh concrete during transportation and placement.

The default 90-minute limit was removed from ASTM C94 in 2021. Current guidance allows the purchaser and concrete producer to establish a suitable discharge limit based on the concrete mixture, weather, delivery distance, admixtures, and project conditions. NRMCA’s 2026 specification guide confirms that ASTM C94 now defers the time limit to the purchaser and producer rather than imposing the old universal cutoff.

That does not mean delivery time no longer matters. Concrete temperature, slump, air content, workability, setting behavior, and permitted water or admixture adjustments must still meet the project requirements.

Final Estimate Checklist

Before relying on your concrete driveway estimate, confirm:

Total driveway length and width
Apron and parking-pad dimensions
Required concrete thickness
Waste allowance
Ready-mix price
Minimum-load and delivery charges
Base depth and material
Reinforcement requirements
Existing driveway removal
Drainage work
Concrete finish
Permit requirements
Local labor price
Taxes and disposal fees

The calculator provides a strong planning estimate. Final order quantities should be verified with the ready-mix supplier, and the installed cost should be confirmed through itemized local quotations.

Concrete Driveway Calculator