Calculators
Concrete & reinforcement
From concrete volume to reinforcing bar schedules and reo mesh coverage.
Decking & masonry
Plan decking-board courses and estimate brickwork or blockwork.
Paint & fill materials
Estimate paint, gravel, soil and asphalt quantities from measured dimensions.
Geometry, layout & levels
Find a diagonal, repeat a spacing or transfer a level.
Measure. Calculate. Keep the result.
- Choose a tool and use metric units or feet and inches. Match each field to the dimension on its diagram.
- Read geometry, quantities and allowances together. Calculate after changing inputs so the result reflects the values you intend to use.
- Give the calculation a name and save it with its measurements.
- Open your saved calculations and find this calculation by its name.
- Keep your measurements with the result. Reopen a saved calculation, change the inputs and save the update or a separate version.
- Export the result as PNG or PDF where the tool and your paid access support export.
In Pro²
Free access includes three calculations per local calendar day, shared across tools that use Calculate, including Converter. Quick Calculator is outside that counter. There is one shared free named-save slot for tools without paid coverage.
Full Pro covers the app; lifetime purchases cover selected tool families. Covered tools get unlimited calculations and named saves, with PNG/PDF export. Reinforcement and Brick & Block Wall have no separate lifetime purchase. Available prices and terms are shown in the app before purchase.
Free calculators in your browser
Calculate here without an account. Explore the full toolkit in Pro² for iPhone.
Help with Pro²
Check the local App Store for current availability, languages and purchase options.
Construction Calculator: Pro² · App Store
Revisit saved work on your iPhone. Keep the original until you choose to update it, or save a separate version.