Handyman Calculator: Concrete

Do the arithmetic in the units you measured in.

Handyman Calc adds and subtracts feet, inches and fractions directly, so you never have to turn 9' 1 3/4" into a decimal and back. Type it the way you read it off the tape.

12' 4 3/8" + 7' 9 1/2" = 20' 1 7/8"

Every answer is also shown in decimal inches, decimal feet and metric, because the person cutting works in one and the person ordering in another.

THE CALCULATOR

• Feet, inches and fractions, added, subtracted, multiplied and divided • Type decimals and millimetres too: 12.25 ft, 3.5 in and 300 mm all work • Multiply two lengths for square feet, and three for cubic feet and yards • Divide a run into equal parts and get an exact fraction back, not a rounded decimal • Divide by a measurement to count instead: 20' divided by 16" answers 15 • Round to 1/8, 1/16, 1/32 or 1/64 — your choice in Settings • Memory keys, and a tap on ft or in converts the answer on screen • Send a keypad answer to any calculator in one tap

SIXTEEN CALCULATORS

• Concrete — slabs, footings and round piers, in yards and in 60 lb or 80 lb bags • Tile and flooring — tiles, boxes and spares • Paint — gallons and quarts, after doors and windows are deducted • Drywall — sheets, tape, joint compound and screws for a room and its ceiling • Decking — boards, joists and screws or hidden clips, with long rows joined on a joist • Gravel, mulch and soil — cubic yards, tons and bags for a bed, square or round • Pavers and patio — pavers counted with their joints, base gravel, bedding sand and edge restraint • Cut list — a plan for every board and offcut, allowing for the saw kerf, that searches for the fewest boards • Board feet — lumber volume and cost • Roofing — squares and bundles, adjusted for pitch • Fence — posts, sections, rails and pickets • Stairs — risers, treads, stringer length and every mark to cut • Squaring — the diagonal to pull, and how far out of square you are • Rafters — any two of rise, run, pitch and diagonal give the rest, with cut angles • Spacing — balusters with every gap under 4", and layout marks at 16" or 24" on center • Circles and arcs — circumference and area, and an arch's radius from its width and height

SHOW THE MATH, SHARE THE ESTIMATE

• Show the math on any result: every step, in your own numbers • Share an estimate as text to a supplier, a client or yourself • Add what you pay per bag, box, sheet, board or yard for an estimated cost • Add to job: keep the slab, the fence and the steps together with one total, and share the job as text or a PDF • Each job adds up its shopping list, ready to copy to a supplier

SAVED AND RECENT

Save the numbers you use over and over — "standard garage slab", "6 ft privacy fence" — and one tap on the chip above the form fills every box in again. Everything you work out is also kept in a list you can scroll back through. Both stay on your phone: no account, no sign-in, nothing uploaded.

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