Concrete Patio Square Footage Calculator
Measure any patio remotely — irregular shapes, multi-zone layouts, and curved edges — without a tape measure or site visit.
3 free measurements included · No credit card required
How to Measure a Patio with SurfaceMeasure
From address to square footage in under five minutes.
Search the Property
Type any address and load the satellite view. Works for residential patios, commercial outdoor spaces, and multi-unit properties.
Trace the Patio Shape
Use the polygon drawing tool to click around the patio perimeter. For patios with multiple zones or cutouts, draw each section separately. The tool handles straight edges, curves, and complex outlines.
Get Instant Square Footage
Area is calculated automatically when you close each shape. Add multiple shapes together for the total. Save, export, or share the project.
The Multi-Zone Problem Most Contractors Know Well
A rectangular patio is easy. Length times width and you're done. But most real patios aren't rectangles. They have a main slab that widens near the house, a separate section wrapping around a built-in fire pit, a narrow walkway connecting to the driveway, and a curved edge along the lawn line.
Breaking that into rectangles by hand means sketching on paper, measuring each section separately, doing the addition, and hoping you didn't miss a section or double-count an overlap. On a complex outdoor living project, manual measurement can take 30–45 minutes and still land 10–15% off.
SurfaceMeasure handles the whole thing by letting you trace the actual shape. You follow the patio edge as it curves, widens, and changes direction — the app calculates the enclosed area precisely. For patios with excluded zones like planters or built-in features, draw those as separate shapes and subtract. The result is a measurement you can order materials from, not just estimate off.
Every Patio Layout, Measured Accurately
Standard slabs, complex multi-zone layouts, and commercial outdoor spaces.
Rectangular and Square Patios
Standard slabs, poured concrete, and square paver layouts. Fastest to draw, accurate to within a few percent.
L-Shaped and Multi-Section Patios
Patios that wrap around a corner, step down to another level, or connect multiple outdoor zones. Draw each section and sum them.
Curved and Freeform Edges
Patios with sweeping lawn lines, curved borders, or organic shapes. Place polygon points along the curve for an accurate trace.
Patios with Cutouts
Built-in fire pits, raised planters, outdoor kitchens, and tree cutouts reduce the actual surface area. Draw them separately and subtract for the net patio area.
Pool Deck and Patio Combinations
Many properties have a patio adjacent to or connected with a pool deck. Measure each surface separately in the same project for a complete picture.
Commercial Outdoor Spaces
Restaurant patios, hotel courtyards, resort outdoor areas, and apartment community spaces. SurfaceMeasure works at any scale.
Built for Outdoor Contractors and Estimators
The trades that measure patio surfaces most often.
Landscapers and Outdoor Living Contractors
Patio square footage drives material estimates for pavers, concrete, polymeric sand, sealers, and base material. Accurate measurements mean tighter bids and fewer material overruns.
Concrete Contractors
Slab pour calculations depend on accurate square footage. Measure remotely before the site visit to arrive with a number in hand, not a guess.
Paver Installers
Paver layouts require precise area calculations for ordering — overage is expensive, shortage is worse. Remote measurement lets you get the number right before you order anything.
From Square Footage to Material Orders
Once you have the net patio area, the downstream math is straightforward.
Square footage is the starting point for every patio material estimate. Once you have the net patio area from SurfaceMeasure, the downstream math is straightforward. Getting the base number right remotely means fewer trips back to the supplier and fewer change orders for material shortages.
Divide sq ft by 81 for 4" depth (one yard covers 81 sq ft at 4 inches), then add 10% waste.
Square footage × 1.1 for standard 10% overage.
Check manufacturer coverage rates — typically given in sq ft per bag.
Coverage rates vary by product, typically 200–400 sq ft per gallon.
Patio Square Footage — Common Questions
Everything contractors need to know about remote patio measurement.
For a rectangular patio, multiply length by width. For irregular shapes, break the layout into rectangles, calculate each section separately, and add them together. Subtract any cutouts — built-in fire pits, planters, or outdoor kitchen footprints — to get the net pourable or installable area. SurfaceMeasure automates this by letting you trace the actual shape on satellite imagery, including cutouts, and calculating the total automatically.
Yes. The polygon drawing tool works by placing points anywhere along the satellite image, so curved patio edges are traced with as many points as needed to follow the curve accurately. The more points you place, the more precise the shape. This is significantly more accurate than approximating a curve as a rectangle.
Draw the full patio outline first to get the gross area. Then draw the cutout shapes separately. Subtract those areas from the gross total to get the net patio surface — the actual area being poured, paved, or sealed.
For most residential and commercial patio projects, satellite measurement is accurate within 1–3% of a physical tape measurement. Combined with a standard 10% overage buffer on material orders, that's more than accurate enough for paving, concrete, and sealer quantities. Some contractors use SurfaceMeasure for the initial estimate and confirm on site before the final material order — which is a reasonable workflow for complex jobs.
Yes. The measurement is surface area regardless of material type. Whether you're quoting a poured concrete slab, a natural stone patio, a brick paver install, or a stamped concrete overlay, the square footage calculation is the same. The material-specific math (yardage for concrete, piece count for pavers) happens after you have the square footage.
Yes. Every project is saved to your account automatically. You can export a PDF with the measurement data and map view, and share a direct link with clients, suppliers, or subcontractors.
Three free measurements are included with no credit card required. After that, it's $9.99 per month or $99 per year. For contractors doing regular estimates, the time saved on the first month of jobs typically covers the annual cost.
Related Measurement Tools
Guides and tools to support the full measurement workflow.
Measure Your Patio in Under 5 Minutes
Start with 3 free measurements — no credit card required. Trace any patio shape and get square footage right now.