Concrete Slab Price Calculator

HomeMath multiplies the slab's area by a published installed price range per square foot for each finish: plain or broom $6.50–$10.50; stamped, basic $10–$14; stamped, mid-range $14–$20; stamped, high-end $20 and up (Concrete Network, read October 2026). The ranges name no thickness, so HomeMath reads them as a 4 in slab and adds the concrete of any extra thickness at $160–$195 a cubic yard. Quoted prices are multiplied by the same area, and the difference over plain is each total minus the plain total. In metric, HomeMath converts meters and centimeters exactly (1 in = 2.54 cm) and shows the result in cubic meters, liters and square meters. In metric the same ranges are shown per square meter.

The published rules it uses: US customary units; metric conversion; published price ranges. Their sources, and how HomeMath tests every result, are on the about page.

The ranges come from Concrete Network's concrete prices (updated July 14, 2026) and its stamped concrete cost page (reviewed January 26, 2026). They are national figures for materials and labor, so a local quote can sit outside them.

Concrete Network gives no separate price for a broom finish, so $6.50–$10.50 is the plain slab range, and the calculator uses it for both. The ranges name no thickness: the calculator reads them as a 4 in slab and adds the concrete of any extra thickness at $160–$195 a cubic yard.

For a patio with the removal of an old one, use the concrete patio cost calculator; for a driveway, the concrete driveway cost calculator.

Switch the units to metric and the calculator takes the size in meters and the thickness in centimeters, gives the area in square meters and takes your quotes per m². The estimate still comes from the same published US ranges, converted: one square meter is about 10.76 sq ft, so a price per square foot × 10.76 is the price per m². A slab over 10.2 cm (4 in) adds its extra concrete at $209–$255 a cubic meter.

1. Area: 16 × 20 = 320 sq ft.
2. Plain or broom: 320 × $6.50 = $2,080, and 320 × $10.50 = $3,360.
3. Basic stamped: 320 × $10 to $14 = $3,200–$4,480.
4. With a quote in hand, use its price per square foot instead of the range: area × quoted price is the installed total.

What a finish adds in percent depends only on the two prices per square foot, not on the size, so a finish that adds a given share to a small slab adds the same share to a large one.

Plain concrete is floated and troweled smooth, which can be slick when wet outdoors. A broom finish leaves fine ridges for grip, the usual choice for driveways, walkways and pool surrounds. Stamped concrete is pressed with patterned mats, often with color, to look like stone, brick or slate; it takes more labor and materials, and its sealer is renewed over the years.

Concrete Network prices stamped concrete in three levels: basic at $10–$14 per sq ft (one pattern, one color), mid-range at $14–$20 (borders, contrasting patterns, several colors) and high-end from $20 (several patterns and colors, scored designs, hand coloring). The 16 × 20 ft slab is $3,200–$4,480 as basic stamped, against $2,080–$3,360 plain. For a stamped patio, with the removal of an old one, use the concrete patio cost calculator.

To price your own, ask for a stamped price per square foot that names the pattern, the colors and the sealer, and enter it in the Stamped field. Things that change a stamped quote, worth asking about:

• The pattern, and whether borders or a second pattern are included
• Integral color (mixed in) or color hardener (spread on top), and the number of colors
• The sealer, and how often the contractor suggests resealing
• Steps, curves and edges, which take more hand work than open areas

Concrete Network's walkway page (updated May 21, 2020) prices a new one at $6–$12 per sq ft. Replacing adds the removal of the old walk, at Fixr's $2–$4 per sq ft for plain concrete, disposal included.

For a bigger tear-out, price the removal in the concrete removal cost calculator.

A driveway is a long slab, but its prices run by design and it is often a replacement, so it has its own calculator. Concrete Network puts a plain driveway at $5–$8 per sq ft, which makes its average two-car driveway of 16 × 40 ft $3,200–$5,120. For the decorative designs, the removal of an old driveway and the same driveway in asphalt, use the concrete driveway cost calculator.

Some contractors quote a total, not a price per square foot. Divide the total by the area to compare it with other quotes and with the ranges above; the calculator does this in the quote check field. For a 400 sq ft slab:

Two quotes at the same price per square foot are only equal at the same thickness. For a 20 × 20 ft slab, with the extra concrete over 4 in priced at $160–$195 a yard:

To price the concrete of a pour you do yourself, use the concrete cost calculator; for the yards and bags of any shape, the concrete calculator.