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CalcMyWay

Home & Trade Calculators

Material quantity calculators for concrete, landscaping, interior and structural work, with the waste allowance applied the way the trade applies it.

Concrete & Masonry

Concrete

Calculate how much concrete a slab, footing, column or set of steps needs. Results in cubic yards, cubic feet and 40, 60 or 80 lb bags, with waste included.

Asphalt

Calculate asphalt tonnage from area and depth. Converts volume to tons at hot-mix density, with compaction allowance and layer guidance.

Landscaping

Mulch

Calculate how much mulch a bed needs in cubic yards or 2 cu ft bags. Includes recommended depths for weed control, moisture and tree rings.

Gravel

Calculate gravel by the ton and the cubic yard for a driveway, path or base layer. Accounts for stone type, density and compaction.

Interior Trades

Paint

Calculate how much paint a room needs from its dimensions, doors and windows. Accounts for coats, ceiling, trim and primer coverage.

Tile

Calculate how many tiles and boxes a floor or wall needs. Accounts for tile size, grout joints, layout pattern and cutting waste.

Wallpaper

Calculate wallpaper rolls from room dimensions, accounting for pattern repeat and match type. Handles US double rolls and European sizes.

Flooring

Calculate flooring boxes from room dimensions, with waste by layout pattern. Covers underlay, transition strips and the attic stock worth keeping.

Drywall

Calculate drywall sheets for walls and ceiling from room dimensions, plus joint compound, tape and screws. Handles any sheet size and openings.

Structural Trades

Deck

Calculate decking boards, joists, beams and footings for a deck from its dimensions. Includes board spacing, joist centres and waste allowance.

Roofing

Calculate roof area, roofing squares and shingle bundles from your footprint and pitch. Includes the pitch multiplier, waste and underlayment.

Fence

Calculate fence posts, rails, pickets and concrete from the run length. Spacing rounds up so sections never exceed your maximum.

Stair

Calculate stair risers, treads and total run from your floor-to-floor height. Checks the result against IRC limits and the 2R+T comfort rule.

Electrical & HVAC

Electricity Cost

Work out what any appliance costs to run per hour, day, month and year from its wattage and your electricity rate. Includes standby power.

BTU

Size an air conditioner or heater in BTUs from your room dimensions, sun exposure, ceiling height and occupancy. Maps the result onto real unit sizes.

Voltage Drop

Calculate voltage drop for copper or aluminium conductors from current, distance and wire size. Shows the smallest gauge that stays within 3%.

Wire Size

Find the minimum wire gauge for a circuit, checked against both ampacity and voltage drop. Shows which constraint governs and why they differ.

Insulation

Work out the insulation depth and bags needed to reach a target R-value, accounting for what is already there. Covers blown and batt materials.