Construction Calculators
ArrayKit's construction calculators help you estimate materials and quantities for home and building projects — how much concrete, gravel or mulch you need by volume, the square footage of a room, roofing and tile counts, stair dimensions and the BTU capacity for heating or cooling a space. Each calculator runs entirely in your browser, so your measurements stay on your device and nothing is uploaded. They give quick planning estimates using standard formulas — always add a waste allowance and confirm quantities with your supplier or contractor before you order.
- Concrete Calculator — Estimate concrete volume and bags for slabs, footings and columns.
- BTU Calculator — Estimate the BTU capacity needed to heat or cool a room.
- Square Footage Calculator — Calculate area in square feet or meters for rooms and projects, with cost.
- Stair Calculator — Calculate stair rise, run, number of steps and stringer length to code.
- Roofing Calculator — Estimate roof area, squares and shingle bundles from footprint and pitch.
- Tile Calculator — Calculate how many tiles and boxes you need for a floor or wall.
- Mulch Calculator — Estimate mulch volume in cubic yards and bags for a bed and depth.
- Gravel Calculator — Estimate gravel volume and weight in tons for an area and depth.
- Paint Calculator — Work out how much paint a room needs from its size, coats, doors and windows.
- Brick Calculator — Estimate bricks and mortar for a wall from its size, brick type and joint width.
- Board Foot Calculator — Calculate board feet and lumber cost for a cut list of boards.
- Drywall Calculator — Estimate drywall sheets, joint compound, tape and screws for a room.
- Wallpaper Calculator — Rolls needed from wall size, roll size and pattern repeat, the way decorators count.
- Fence Calculator — Posts, rails, pickets and concrete bags for a fence run, using the fencepost rule.
- Rebar Calculator — Count the bars, laps, ties and weight of reinforcement for a concrete slab.
- Asphalt Calculator — Turn a driveway or car park into tons of hot mix, cubic yards and cost.
- Insulation R-Value Calculator — Add up an assembly’s R-value, U-factor and heat loss layer by layer.
- Deck Calculator — Boards, joists, footings and screws for a deck, with joist spans checked.
- Stud Calculator — Count studs, plates, headers and cripples for a wall, openings included.
- Roof Pitch Calculator — Convert pitch, angle, grade and slope factor, with rafter lengths and roof area.
Frequently asked questions
- Do I need to install anything to use these construction calculators?
- No. Every construction calculator on ArrayKit runs directly in your browser, so there is nothing to install and the measurements you enter are processed locally on your device.
- Should I add extra material to the construction calculator estimates?
- Yes. These calculators give a baseline quantity; add a waste allowance (commonly 5–15% depending on the material and cuts) and round up, then confirm with your supplier before ordering.
- Do the construction calculators upload my measurements?
- No. All of the math happens in your browser, so the dimensions you type never leave your device or get uploaded to ArrayKit.
- Which construction calculators does ArrayKit offer?
- The category covers concrete, gravel and mulch by volume, square footage, roofing, tile and stair calculators, plus a BTU calculator for sizing heating and cooling.