Driveway Square Footage Calculator

For a rectangular driveway, you multiply length by width. For anything irregular — curved, L-shaped, or multi-section — you need to break it into segments and add them together. SurfaceMeasure skips the manual math entirely: you trace the shape on a satellite image and the area is calculated automatically, regardless of how complex the driveway is.

A single-car driveway one car length deep is roughly 10 × 20 ft, or about 200 sq ft. A standard two-car driveway is around 20 × 20 ft (400 sq ft), and a two-car driveway two car lengths deep runs about 20 × 40 ft, or 800 sq ft. Long driveways to a detached garage often land between 600 and 1,200 sq ft, and circular turnarounds typically fall between 800 and 1,500 sq ft. These are common ranges, not rules — driveway sizes vary a lot by lot shape and setback, so measure before you quote.

A driveway one car deep is about 18–20 ft long, and one two cars deep is about 36–40 ft. A drive back to a detached garage commonly runs 60–100 ft. Width follows the number of cars side by side, at roughly 9–10 ft per car, so a two-car driveway is 18–20 ft wide. Setbacks and lot shape move all of these, so treat them as a sanity check and measure the real driveway before you quote it.

Yes. For a rectangular driveway, enter its length and width in the calculator on this page. For a curved, circular or multi-section driveway, search the address in SurfaceMeasure, trace the driveway's edge on the satellite image, and the enclosed square footage comes back directly, typically within 1–3% of a tape measurement when the edge is not hidden by trees or a parked car. Neither needs a tape measure or a trip to the property.

Yes. The polygon drawing tool works by placing points anywhere on the satellite image, so you can follow curves, angles, and irregular edges with as much precision as you need. The more points you place along a curve, the more accurately the shape is traced. Curved and L-shaped driveways are exactly where tracing beats manual math: a tape measurement has to approximate a curve as a series of rectangles, while a traced polygon follows the real edge. For a long sweeping curve, eight to twelve points is usually enough to get within a square foot or two of the true area.

For most driveways, satellite-based measurement lands within 1–3% of an in-person tape measurement — accurate enough for material estimation, quoting, and job planning. The dollar impact is smaller than it sounds: even a worst-case 3% error on a 2,000 sq ft driveway priced at $0.15 per square foot moves the quote by about $9. Factors like image resolution and the angle of satellite capture can introduce minor variation, but in practice, SurfaceMeasure measurements are consistently close enough for professional estimates — and far closer than eyeballing, which commonly misses by 20% or more.

Yes. You can draw multiple shapes within the same project — useful for driveways with a separate apron, a widened garage pad, or split sections. Each shape is measured independently, so you can see the breakdown and the total. The apron is the section worth splitting out most often: the flare where the driveway meets the street typically adds 150–400 sq ft, and because it collects the most road grime it is often priced as its own line item on cleaning and sealing quotes.

Yes. The tool works at any scale. Commercial entry drives, parking lot approaches, large paved surfaces, and multi-unit property driveways can all be measured the same way as a residential driveway — just with more polygon points.

No. SurfaceMeasure uses satellite imagery, so as long as the property is visible from above (which covers virtually all addresses in the U.S.), you can measure it without leaving your desk. Many contractors use it to measure properties before deciding whether a physical visit is necessary.

SurfaceMeasure starts with 1 free measurement — no credit card required. Paid plans are $9.99 per month or $99.99 per year, and the annual plan works out to two months free. For contractors doing regular estimates the math is short: if skipping one drive-out saves you half an hour and a gallon of fuel, the tool has paid for its month on the first quote. There is no per-seat pricing or measurement quota on paid plans — unlimited measurements, saved history, and PDF quotes are included.