HB Construction Calculator
Contractor Math & Estimator
Free · Designed for iPad. Not verified for macOS.
Built for the jobsite. Calculate feet, inches, fractions, electrical, plumbing, concrete, HVAC, grading, materials and more — fully offline.
HB Construction Calculator is a powerful construction calculator built for contractors, carpenters, electricians, plumbers, HVAC technicians, concrete crews, estimators, and other construction professionals.
Perform feet-inch-fraction math the way measurements are used on the jobsite, quickly convert between imperial and metric units, and access eight specialized construction calculators in one app.
Works fully offline. No login. No account required. No paywall.
8 CONSTRUCTION CALCULATORS IN ONE APP
ADVANCED CAL
Calculate roof pitch, rise, run, diagonal, hip and valley rafters, jack rafters, stairs, circles, board feet, studs, blocks, drywall, footings, roofing squares, and more.
MASTER 5
An everyday construction and carpentry calculator for stairs, arcs, irregular pitch calculations, jack rafters, weight, cost, and paperless tape measurements.
ELECTRICAL CALCULATOR
Perform electrical calculations including Ohm's Law, Kirchhoff equations, wire sizing, voltage drop, conduit fill, motor full-load current, motor protection, grounding, and other common electrical calculations.
PIPE AND PLUMBING CALCULATOR
Calculate pipe offsets, rolling offsets, fitting allowances, cut lengths, 45-degree fittings, flow, pressure, pipe sizing, and other common plumbing measurements.
CONCRETE AND MASONRY CALCULATOR
Calculate concrete volume, cubic yards, concrete bags, footings, walls, blocks, rebar, stairs, drop, and estimated truck loads.
HVAC AND SHEET METAL CALCULATOR
Calculate duct takeoffs, OGEE offsets, Fan Laws, velocity pressure, FPM, Law of Cosines, stretch-outs, and other HVAC and sheet metal measurements.
EXCAVATION AND GRADING CALCULATOR
Calculate cut and fill, slopes, percent grade, bank volume, loose volume, compacted volume, swell, shrink, and estimated truck loads.
MATERIAL ESTIMATOR
Estimate quantities and coverage for paint, tile, decking, fencing, studs, blocks, flooring, sheet goods, brick, gravel, and other construction materials.
FEET, INCHES AND FRACTIONS
Enter measurements the same way you use them on the jobsite.
For example:
12 ft 6 3/8 in
There is no need to convert measurements to decimals before calculating.
Quickly work with:
* Feet and inches
* Fractions
* Yards
* Meters
* Square measurements
* Cubic measurements
* Imperial and metric conversions
SAVE YOUR CALCULATIONS
Keep important calculations in History so you can return to them later.
Your calculations stay organized and available when you need them.
CHOOSE YOUR DEFAULT CALCULATOR
Choose the calculator you use most from Tools and set it as your default.
Your selection is saved so your preferred calculator is ready the next time you open the app.
BUILT FOR CONSTRUCTION PROFESSIONALS
HB Construction Calculator is designed for:
* Contractors
* Carpenters
* Electricians
* Plumbers
* HVAC technicians
* Concrete and masonry crews
* Excavation and grading crews
* Estimators
* Construction professionals
Whether you are measuring lumber, laying out stairs, calculating electrical loads, planning pipe runs, estimating concrete, sizing ductwork, grading a site, or preparing a material takeoff, HB Construction Calculator gives you practical tools directly on your phone.
SIMPLE, PRIVATE AND READY FOR THE JOBSITE
* Fully offline
* No account required
* No login
* No paywall
* No unnecessary setup
Open the app and start calculating.
HB Construction Calculator — from Handy Bro.
Learn More:
https://www.handybro.app
Terms of Use:
https://www.handybro.app/construction_calculator/terms
Privacy Policy:
https://www.handybro.app/construction_calculator/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Trung Huynh, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Trung Huynh
- Size
- 13.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Trung Huynh