BuildCalcX

Name: BuildCalcX
Author: FastX Apps For Android

By: FastX Apps For Android App

Premium offline estimator for lumber board feet, concrete bags, and stairs.

Overview

Google Play Store

Downloads

Data as of 2026-09-17

Version:

1.0.0

Last updated: 2026-08-15

Ranking

#3,167,074 ▲ 1,651

Overall

Features & Capabilities

BuildCalcX is a premium, offline-first construction and carpentry estimator designed for builders, contractors, carpenters, and DIY enthusiasts who need instant, high-precision dimensional math on the job site.

Featuring a bold, high-contrast brutalist industrial design with safety orange highlights and thick grid lines, BuildCalcX strips away useless animations and delivers immediate, rugged utility without requiring any internet connection.

KEY FEATURES:

* Stair Stringer Layout Calculator: Quickly determine step risers, tread runs, total step count, and stringer slope angles. Input total rise and run to get immediate, code-compliant specifications.
* Concrete Slab & Bag Estimator: Calculate the precise volume of concrete needed for slabs, columns, or footings. Instantly determine the number of 80lb, 60lb, or 40lb bags required.
* Lumber Board Feet Calculator: Input thickness, width, length, and quantity to calculate volumetric board feet (FBM) and total cost estimations.
* Material Logbook: Save and catalog your calculations directly to your device with our offline Room database ledger. Retrieve your measurements instantly when organizing material orders.
* Unit System Toggle: Seamlessly switch between Imperial (inches, feet, yards) and Metric (mm, cm, meters) measurements.
* DataStore Presets: Customize default settings, including haptic vibration feedback and default bag sizes, which persist across launches.

WHY BUILDCALCX?

* 100% Offline-First: Built for rugged job sites, remote basements, or areas with no cellular network. All math is processed instantly on your device CPU.
* Strict Privacy Guarantee: No tracking, no ads, no analytics, and no accounts. Your data never leaves your device.
* Compact APK Size: Optimized using Jetpack Compose and R8 code minification to remain under 25MB.
* Zero Permission Bloat: The app does not request access to your contacts, storage, internet, or location.

Eliminate guesswork on the job site with the ultimate industrial construction sizer. Download BuildCalcX today!