Handy Bro Construction Calculator

A HandyBro app

HB Construction Calculator

Help and support

HB Construction Calculator is a construction calculator from Handy Bro for contractors, carpenters, electricians, plumbers, HVAC techs, concrete crews, and estimators.

Do feet-inch-fraction math the way a tape reads, convert imperial and metric in one tap, and switch between eight construction calculators. The app works fully offline. No login. No paywall.

Eight construction calculators

Pick a pad in Settings. Each one is built for a trade, not a spreadsheet.

Advanced Cal

Carpentry and general work

Roof pitch, rise, run, and diagonal. Hip and valley, jacks, stairs, circles, board feet, studs, blocks, drywall, footings, and roofing squares.

Master 5

Everyday carpentry

Stairs, arcs, irregular pitch and jack, weight, cost, and paperless tape for day-to-day layout.

Electrical Calculator

Electricians

Kirchhoff and Ohm, wire size and voltage drop, conduit fill, motor full-load current and protection, and grounding.

Pipe & Plumbing Calculator

Plumbers and pipefitters

Offsets and rolling offsets, fitting allowance, cut lengths, 45s, flow, pressure, and pipe size.

Concrete & Masonry Calculator

Concrete and masonry

Cubic yards and bags, footings, walls, blocks, rebar, drop, stairs, and truck loads.

HVAC / Sheet Metal Calculator

HVAC and sheet metal

Duct takeoffs, OGEE offsets, Fan Laws, velocity pressure and FPM, law of cosines, and stretch-outs.

Excavation & Grading Calculator

Excavation and grading

Cut and fill, slopes and percent grade, bank, loose, and compact volumes, swell and shrink, and truck loads.

Material Estimator

Takeoff and coverage

Quantity takeoff and coverage for paint, tile, deck, fence, studs, blocks, flooring, sheets, brick, gravel, and cost.

Using the app

  1. Calculator

    Enter feet, inches, and fractions the way you call them on site. Convert units without leaving the pad.

  2. History

    Reopen a finished calculation. Entries stay on your phone and are not uploaded to Handy Bro.

  3. Settings

    Set the default construction calculator, appearance, and keypad vibration. Send feedback or a question from Support.

Common questions

What is HB Construction Calculator?

HB Construction Calculator is a construction calculator for the jobsite. It does feet-inch-fraction math the way a tape reads, converts imperial and metric units, and includes eight trade pads for carpentry, electrical, plumbing, HVAC, concrete, excavation, and estimating. It is listed as HB Construction Calculator and is also called Handy Bro Construction Calculator.

Which construction calculators are included?

Advanced Cal, Master 5, Electrical, Pipe & Plumbing, Concrete & Masonry, HVAC / Sheet Metal, Excavation & Grading, and Material Estimator.

Does the app work offline?

Yes. Every calculator works without an internet connection. History and your default calculator stay on the device.

Do I need an account or a subscription?

No. There is no login, no account, and no paywall. Download the app and use every calculator.

How do I switch construction calculators?

Open Settings, choose a calculator, and that pad fills the Calculator tab. The app remembers your default so it opens the same pad next time.

How do I save and reopen a calculation?

Finished results are saved in History on your device. Tap a row to restore that calculation and return to the Calculator tab. History holds up to 100 entries.

How should I treat the results?

Results are for convenience. Check measurements, materials, codes, and jobsite conditions before you rely on a number in the field. A qualified professional should verify work.

What information does the app collect?

The app does not collect your name, email, or the contents of your calculations. Calculations stay on the device. The only external library is Google Firebase Analytics, which measures how the app is used. See the Privacy Policy for details.

Is this the same as the Handy Bro estimator app?

No. This app is a standalone construction calculator. Handy Bro is a separate product for AI estimates, proposals, and invoices. Settings includes a link to that estimator app if you want both.

How do I contact support?

Email contact@handybro.app. Include the app name, the calculator you were using, and what you expected versus what you saw.

Contact us

For questions, bugs, or App Store and Google Play support, email Handy Bro. We read every message.