MC360 // Roofing & Exteriors
SIDE THE HOUSEWITH EXACTSQUARES.
How much siding do I need? Like roofing, vinyl siding sells by the square — 100 square feet per box count. Enter wall dimensions, subtract openings, add gables and waste, and walk into the supplier with squares and trim footage already figured.
The Instrument
The Vinyl Siding Calculator, up close
Inputs
Outputs
Opens the live calculator on matcalc360.pro
Run your own numbersProcess
Three steps. Zero guesswork.
Enter your measurements
Length, width, depth, pitch — the numbers you already pace off on site. No blueprints, no signup, no spreadsheet.
Calculate materials
The calculator applies the right formulas, density factors and waste allowances for your specific material.
Get your results
Squares, yards, tons, boards or sheets — a clean order list you can hand straight to the supplier.
Field Guide
SIDING SQUARES, GABLES AND TRIM — FIGURED
Walls are perimeter × height
Measure around the house and multiply by wall height for gross wall area, then subtract window and door openings. Siding is sold in squares of 100 square feet, typically two squares per box. The math is friendly — the openings list is where estimates usually slip.
- Gross area = perimeter × height
- Subtract windows and doors
- 1 square = 100 sq ft of siding
Gables are triangles — don't skip them
Each gable end adds half its base times its height. A 24-foot gable with a 6-foot rise adds 72 square feet per end. Two-story and cross-gabled homes stack several — measure each one, because gables routinely hide 15% of a siding order.
- Gable area = base × height ÷ 2
- Count every gable end separately
- Dormers count as small gables
Trim is a second order of its own
J-channel frames every window, door and wall top; starter strip runs the full perimeter; inside and outside corners run full height. Add 10% waste to the siding squares and list trim pieces in linear feet — the calculator keeps both on one sheet.
- J-channel: around every opening
- Starter strip = house perimeter
- 10% waste on squares
Keep calculating
SELLING UNIT
100 ft²
per square of siding — the unit every supplier quote is built on
Related Calculators
Keep the takeoff going
FAQ
Questions from the field
Straight answers on units, waste factors and ordering — the details that decide whether the job finishes on the first delivery.
Ready when you are
STOP GUESSING.START BUILDING.
Free. No signup. Built for the jobsite.