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New in 1.9.0: • Calculators open with a worked example already figured, marked "Example". Type your numbers to replace it. • Less clutter: waste, overhang, openings and other extras are under "More options". • Clearer home screen: icons on colored tiles and short tool names. Long-press a tool to add it to Favorites.
Stair & roofing calculator with 3D, concrete, rafters, feet-inch. No pop-ups
Every calculator free. No subscription. No pop-up ads. 20 job-site construction calculators, with drawings that show what you're building, and a 3D view of your stairs and concrete slab that you turn with one finger before you cut a board or order a yard. FREE, NO SUBSCRIPTION, NO POP-UPS • All 20 calculators are free to use — no paywall, no locked "pro" tools, no trial that runs out • One small banner at the bottom. Don't want it? Remove it with a one-time $2.99 purchase • No subscription, no weekly or yearly plan — pay once (or never) and keep it • No full-screen ads, no videos, nothing that covers the keys or clears your calculation SEE IT BEFORE YOU BUILD IT Stairs, roofs, decks, balusters, fences and right triangles are drawn to scale from your numbers: every riser and tread, the rafter and pitch, the deck boards over the joists, every baluster with its gap. Change a number and the drawing follows. The stair and concrete calculators add a 3D view: drag to turn the stairs or the slab, tap to show or hide the sizes. TYPE IT LIKE YOUR TAPE READS 5' 3 1/2", 3/4", 2.5m — feet, inches and fractions just work. Add, subtract, multiply and divide lengths, round to 1/8", 1/16" or 1/32". A bar above the keyboard has the ' " / and space keys and shows the answer while you type. Memory keys and a paper tape keep a running total. BUILT FOR THE JOB SITE • Works offline — basement, crawl space, new build with no signal • High-contrast mode for full sun, plus dark mode • Screen stays on while a calculator is open • Remembers what you typed and keeps a history of your calculations • Star the calculators you use most to pin them to the top • Search finds any calculator in a tap • Share any result by text or email • English and Spanish, switch any time in Settings 20 CALCULATORS • Feet-inch fraction calculator (tape measure math) • Stair stringer calculator — risers, treads, total run, stringer length, stair layout, IRC checks • Roofing — roof pitch, rafter length, squares and shingle bundles • Rafter calculator — common and hip rafter length for any roof pitch • Right triangle & squaring with the 3-4-5 check • Concrete — slabs, footings and posts; cubic yards and 40/60/80 lb bags • Deck boards, joists and screws · Fence posts, rails, pickets and post concrete • Wall studs & plates · Baluster spacing • Drywall sheets, screws, mud & tape · Paint gallons · Flooring & tile • Concrete block · Brick & mortar · Board feet · Insulation • Gravel, mulch & topsoil (yards and tons) · Construction unit converter · Bubble level No account, no sign-up, nothing leaves your phone. WHY CLEAN SCREEN APPS I got tired of apps that throw full-screen ads at you in the middle of a job, so I build apps with no pop-up ads. TrueSquare Calc is the first one. Questions or a calculator you'd like added? Email xufengce209@gmail.com. Results are estimates. Always check measurements, product labels and your local building code.