Construction Calculator A1
By Binary and BricksEvery calculation a site needs — concrete, brick, steel, plaster, paint and more — in one app that works offline, in metric and imperial, anywhere in the world.
Get the app
Opens Google Play or the App Store, depending on your device.
80+calculators in one app
150+countries using it
1.5M+downloads across our apps
Pro tier
Unlock every calculator, remove ads and export results as PDF reports for clients.
What's inside
Concrete volume & mix design
Brick, block & mortar quantities
Steel quantities & bar bending schedule
Plaster & paint quantity
Flooring & tile calculation
Excavation & anti-termite treatment
House construction cost
Feet-inch calculator with fractions
Metric ⇄ imperial across every calculation
Export reports as PDF, Excel or Word
Add results to a Bill of Quantities
Works fully offline on site
A look inside the app
Why professionals use it
Feet-inch arithmetic, built in
A construction-mode calculator that adds and converts feet, inches and fractions directly — no decimal conversion in your head.
Reports your client will accept
Every calculation exports as a formatted PDF, Excel or Word report, with project details and a signature field.
Straight into a BOQ
Push results into a Bill of Quantities as you go, then export the whole bill when the take-off is done.
Try it free first
The same calculations, free in your browser
No download needed. When you want them on site without a signal, the app takes them offline.
From the Construction Calculator A1 blog
All posts →
Learn the method, not just the answer
Our guides explain the calculations behind this app, formula by formula.