# HB Construction Calculator — Contractor Math & Estimator

> Contractor Math & Estimator (iPhone/iPad app by Trung Huynh.)

- Source: https://appshunter.io/ios/app/hb-construction-calculator/id6802777178 (this page in markdown: same URL + `.md`)
- Developer: [Trung Huynh](https://appshunter.io/developer/1134425534)
- Category: Utilities, Business
- Price: Free
- Age rating: 4+
- Requires: iOS 18.6 · 13 MB
- Languages: American English
- Released: 2026-09-01
- Data updated: 2026-09-10
- User reviews in markdown: https://appshunter.io/ios/app/hb-construction-calculator/id6802777178/reviews.md

## What is HB Construction Calculator?

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


## Version history (last 1 release)

### 1.0 — 2026-09-01

No release notes.

## More apps by Trung Huynh

- [Crazzy Tank Battles - 3D Tank](https://appshunter.io/ios/app/crazzy-tank-battles-3d-tank/id1134425535)
- [Shake Your Brain - Puzzle game](https://appshunter.io/ios/app/shake-your-brain-puzzle-game/id1148393043)
- [Safe Driving App: Drowsy Alert](https://appshunter.io/ios/app/safe-driving-app-drowsy-alert/id1530140693)
- [Sun Tracker: Tan & Exposure](https://appshunter.io/ios/app/sun-tracker-tan-and-exposure/id6757251961)
- [HB Construction Estimate Maker](https://appshunter.io/ios/app/hb-construction-estimate-maker/id6758679791)

All apps by Trung Huynh: https://appshunter.io/developer/1134425534

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*