Driveway Calculator

Driveway Calculator: Concrete and Asphalt for Paved Drives

A paved driveway is one of the biggest single pours or lays most homes ever pay for, and it is priced from three simple numbers: the length, the width and the thickness. This driveway calculator turns those numbers into the material you actually order — concrete in cubic yards or asphalt in tons — and then into an installed-cost ballpark you can compare with quotes. It covers paved driveways only: concrete and asphalt, priced per square foot, with the waste and the price range a real quote usually hides inside one lump sum.

Measure the drive as one rectangle where you can. If it widens at the street or turns toward a garage, split it into two rectangles, run each one through the calculator and add the results together. Enter the thickness you will actually build, not the thickness you hope the ground will forgive, because an inch of thickness changes the order by a quarter on a standard drive.

Choosing gravel instead? Read the gravel driveway guide — different maths, different page.

Concrete vs asphalt: the honest comparison

Both materials make a proper paved drive; they differ in price, lifespan and upkeep. Concrete costs more up front and asks for almost nothing afterwards. Asphalt is cheaper to lay, softer under summer heat, and needs sealing every few years to reach its full life. This table uses typical installed figures — your quote will move with access, ground conditions and how much preparation the old surface needs.

Measure	Concrete	Asphalt
Installed cost per sq ft	$8–15	$5–10
Typical lifespan	25–30+ years	15–25 years, with sealing every few years
Look	Light, clean finish; can be stamped or coloured	Dark, plain finish that suits most streets
Repairs	Cracks are hard to hide; slabs are often replaced whole	Easy to patch and resurface; patches stay visible

Neither surface forgives a bad base. Most early failures blamed on the material are really base failures — soft spots, poor compaction or water sitting where it should drain away. When you compare quotes, the line that matters most is often the preparation, not the surface thickness.

How thick should a paved driveway be?

For concrete, 4 inches suits cars and everyday family use, and it is the default in the calculator. Step up to 5–6 inches for heavy vehicles, RVs and delivery vans, or anywhere a loaded vehicle will park in the same spot day after day. Asphalt driveways are commonly laid at about 3 inches over their base. Going thicker is cheap insurance on soft ground, but it never rescues a base that was rushed.

Both surfaces sit on a compacted gravel base of 4–6 inches. That base is a separate order of stone, and it is not included in the figures above — work it out on the Gravel Calculator, using the same length and width and a depth of 4 to 6 inches.

Practical notes before you pour or pave

• Give concrete time. A new concrete drive needs about 7 days before cars park on it, and longer before anything heavy uses it. Plan where the vehicles will go that week before the pour is booked.
• Check the rules first. Permits or HOA rules may govern driveway widening, new curb cuts and even the surface colour, and a wider drive can change how rainwater runs off your lot.
• Joints and slope matter more than thickness. Expansion joints let concrete move without cracking at random, and a steady drainage slope away from the house keeps water out of the garage and off the foundations. An extra inch of thickness fixes neither.
• Edges do the quiet work. Firm edging or thickened edges stop asphalt spreading and concrete corners breaking where tyres turn off the drive.

What to calculate next

• Concrete Calculator — slab maths in detail, including bags and other shapes.
• Gravel Calculator — the base underneath the drive, in tons and cubic yards.
• Paver Calculator — the third option, priced block by block.

Frequently asked questions

Estimates only — driveway quotes turn on access, soil and drainage; get site quotes.