Home & Construction

Works out the water volume of a rectangular or round fish tank in US gallons, litres and cubic feet, less glass and fill gap, and the weight of that water.

Works out the board feet in pieces of lumber from thickness, width and length, with linear feet, cubic feet, cubic metres and cost at a price the user enters.

Counts the bricks for a single-wythe wall from its area, openings, brick size and joint thickness, adds a waste allowance, and works out the net mortar volume.

Works out the waist and hem radii of a full, half or quarter circle skirt from the waist and length, the hem edge length, and the fabric to buy for a given fabric width.

Works out the concrete for a slab or for round tube-form columns in cubic yards and cubic metres, adds a separate waste allowance, counts bags and prices it at the user's rate.

Adds, subtracts, multiplies and divides lengths written in feet, inches and fractions, and gives the answer as a tape-measure reading, in decimal feet and in metric.

Works out the volume of a box or cylinder from its dimensions and gives it in cubic feet, cubic yards, cubic metres, cubic inches, US gallons and litres.

Counts the drywall sheets for a rectangular room from its walls and ceiling, less doors and windows, with a waste allowance shown separately.

Works out the floor area of a room, adds a separate waste allowance, and counts the boxes of flooring to buy from the coverage per box, with an optional cost.

Turns a design heating load into the furnace output range ACCA Manual S allows, 100% to 140% of the load, and the input ratings that match at a given AFUE.

Works out the cubic yards of gravel, stone, sand, soil or mulch an area needs at a given depth, adds a separate allowance, and estimates the weight from a bulk density the user enters.

Works out the acreage of a rectangular or triangular plot, or of an area given in another unit, and shows it in hectares, square feet, square metres, square yards and square miles.

Counts the posts, rails and pickets for a straight fence run, spacing the posts evenly at or under a maximum and adding spare pickets as a separate line.

Works out the volume inside a pipe, hose or tube from its inside diameter and length, in gallons, litres and cubic feet, with volume per foot and per metre and the water weight.

Works out the backing size for a quilt, the number of fabric widths to join, the seam direction that uses less fabric, and the yardage to buy.

Converts a rise and run into a roof pitch, angle, slope percentage and multiplier, and turns a footprint into roof area, roofing squares and shingle bundles.

Works out the siding a house needs in squares from its wall length and height and gable ends, less openings, with a waste allowance shown separately.

Works out the sod a lawn needs with a separate waste allowance, the pallets at a supplier's coverage, and the installed cost at prices the user enters.

Estimates the number of solar panels and the system size that cover a yearly electricity use, from peak sun hours, panel rating, system losses and inverter efficiency.

Adds up the floor area of up to two rectangles, a triangle and a circle, and gives it in square feet, square yards, square metres and acres, with an optional depth for cubic yards.

Counts the studs for a straight wall at a chosen on-centre spacing, adds extra studs and a waste allowance, and works out the plate material and plate boards.

Counts the rolls of wallpaper a room needs by the strip method, from wall width and height, roll width and length, pattern repeat and trim allowance.