Hammer Construction Calculator

Feet-inch-fraction math, 20 trade calculators, and material takeoffs that become branded PDF quotes. Built for carpenters and contractors. Try free for 7 days.

The construction calculator that finishes the job: feet-inch-fraction math, 20 trade calculators, and a material takeoff that turns into a professional PDF quote — all in one app.

WHY PROS SWITCH TO HAMMERCALC

FEET-INCH-FRACTION MATH, DONE RIGHT

• Mix feet, inches, millimeters, and meters in one calculation
• Tape-measure fraction strip: tap or slide to enter 1/16s faster than typing
• Results in feet-inches AND metric, side by side
• Custom rounding: 1/16", 1/32", 1/64", or decimal

20 TRADE CALCULATORS — EACH WITH A LIVE DIAGRAM

• Framing: rafters (hip/valley/jack cut lists, birdsmouth), roof squares & flashing, wall framing with stud counts, rake walls
• Stairs: rise, run, stringers — with IRC code checks built in (max riser, tread, headroom, 2R+T comfort)
• Outdoor: decks, fences (incl. chain-link), concrete bags/yards/rebar, baluster spacing (4" sphere rule)
• Finishes: drywall, paint, tile, flooring, siding
• Layout & lumber: square footage with cutouts, board feet & cost, cut list optimizer (fewest boards, least waste), compound miter/crown, triangle & pitch, circle/arc layout
• Every field label explains itself — long-press for a diagram

FROM CALCULATION TO QUOTE — NO OTHER CALCULATOR DOES THIS

• One tap sends any tool's material list to a project takeoff
• Buy-list smarts: rounds up to lengths the yard actually sells, never orders short
• Check off materials on site as you load the truck
• Price book remembers what you paid last time
• Add labor, markup, and tax — export a branded PDF quote with your logo
• Share as PDF, CSV, or plain text

PLANS & NOTES ON THE JOBSITE

• Load blueprint PDFs and photos — auto-saves your page, zoom, and position
• Job notes with one-tap capture of any calculation
• Quick links to your building codes and span tables

BUILT FOR THE FIELD

• Works fully offline. No ads. No popups. No data collection.
• Dark mode for early starts, haptic keys, 12 accent colors
• English & Español — switch live in Settings
• iPhone, iPad, and Mac

PERFECT FOR Carpenters • Framers • Contractors • Remodelers • Deck builders • Estimators • Engineers • Machinists • Architects • Serious DIYers

TRY IT FREE FOR 7 DAYS Full access to everything. No commitment — cancel anytime.

A subscription is required after the trial. Auto-renews unless canceled 24 hours before the period ends. Manage or cancel in Settings > [Your Apple ID] > Subscriptions.

Support: hammercalc@gmail.com Terms: https://www.hammerstorm.co/terms Privacy: https://www.hammerstorm.co/privacy