Patio Calculator
Size a patio and its base layer. Enter length, width, and base depth; the tool multiplies length by width for the surface area in square feet and computes the base material volume in cubic yards from the depth.
What this calculator does
The Patio Calculator estimates your result instantly from the values you enter, using standard construction & home formulas. Size a patio and its base layer. Enter length, width, and base depth; the tool multiplies length by width for the surface area in square feet and computes the base material volume in cubic yards from the depth. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Patio Calculator
Enter three measurements: length and width in feet, and base depth in inches. The tool multiplies length by width to give the patio area in square feet.
For the base layer it converts the depth from inches to feet (divide by 12), multiplies by the area to get cubic feet, then divides by 27 to convert to cubic yards of gravel or sand. It runs free in your browser.
Formula & Mathematical Calculation
Area (ft²) = f(Length (ft), Width (ft), Base Depth (in))
Calculated according to standard construction formulas implemented in the calculator core.
Calculation Example
Enter Length 12 ft, Width 10 ft, and Base Depth 4 in.
Area = 12 × 10 = 120 ft².
Base = 120 × (4 ÷ 12) ÷ 27 = 40 ÷ 27 = 1.48 yd³.
The tool shows Area (ft²) as 120 and Base Material (yd³) as 1.48.
Key Benefits
- Gives both the surface area and the base material volume from one set of measurements
- Handles the inch-to-foot and cubic-foot-to-cubic-yard conversions for you
- Reports base material in cubic yards, the unit gravel and sand are usually ordered in
- Free and runs in the browser with no sign-up
How to Use this Calculator
-
Enter length and width
Type the patio length and width in feet into the Length (ft) and Width (ft) fields. -
Enter the base depth
Type the depth of the base layer in inches into the Base Depth (in) field. -
Calculate
Press Calculate and read Area (ft2) and Base Material (yd3) in the result boxes.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Patio Calculator produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.