Worldwide concrete volume estimator
Concrete volume for slabs, footings and columns, from dimensions - with cement, sand and aggregate to order for the whole job, not just one pour at a time.
Rectangular slabs, strip footings, and round or square columns - each with its own dimension fields and a quantity for identical repeats, like fence posts or footings.
1:1.5:3 structural, 1:2:4 general, 1:3:6 mass fill, or a custom ratio - 25kg, 50kg or 94lb (US) cement bags, metric or imperial units.
Add every slab, footing and column in a job and see cement, sand and aggregate to order for the whole thing, not a separate tally per pour.
Bags of cement, tonnes of sand and aggregate, and water by the litre - from a standard dry-volume factor and material densities, with a waste allowance built in.
Name each pour for a job that reads back clearly, then copy a plain-text summary or export the whole job as a standalone HTML file to keep, print or send on.
Every pour sits in a list on the left - click one to edit it on the right, with job totals always visible at the bottom. Light/dark theme remembers your choice.
Construction Master Pro is a well-known handheld (and app) construction-math calculator with built-in concrete and masonry functions. It's a general-purpose jobsite calculator rather than a job-tracking tool - here's how it compares.
| Feature | Concrete Volume Calculator | Construction Master Pro |
|---|---|---|
| Pricing model | Free | One-off purchase, roughly $60-90 for the handheld device |
| Works fully offline | ✓ | ✓ |
| Cement, sand, aggregate and water broken out separately | ✓ | ~ |
| Multiple pours tracked as one job total | ✓ | ✕ |
| Named pours with CSV/PDF export | ✓ | ✕ |
| Covers other trades (roofing, stairs, framing, drywall) | ✕ | ✓ |
| Physical tactile keypad device | ✕ | ✓ |
| Any custom mix ratio, worldwide units | ✓ | ~ |
Comparison based on Calculated Industries' publicly listed pricing and features for Construction Master Pro as of August 2026 (amazon.com, forconstructionpros.com, acmetools.com) - pricing and features change over time, so check calculated.com for current details. Construction Master Pro is a trademark of its respective owner; this comparison is for informational purposes and isn't sponsored by or affiliated with Calculated Industries.
Two pours on one small domestic job, priced as one order. This is the calculator's built-in sample - load it in the browser edition and change any figure to see the totals move.
The slab alone is 4 × 3 × 0.1 = 1.2 m³ before waste; the 10% allowance takes it to 1.32 m³, and the bag counts come from the 1.54× dry-volume factor and generic material densities the app states on screen. Switch the mix to 1 : 3 : 6 and the cement drops sharply - which is exactly the sense-check the tool is for before you ring the merchant. Open the browser edition to try it with your own figures.
Measure it from your drawing: Measure the slab area off the PDF drawing in Takeoff Studio, free, with voids taken out. With Pro, the Concrete slab assembly works out concrete, mesh, DPM and edge formwork.
Open it in BIM Explorer: Have the IFC model? BIM Explorer Pro takes slab and footing volumes straight off it, by storey - check first with the free quantity check.
No - use it straight from your browser, on a phone, tablet or PC, with no sign-up. It works offline once it has loaded, and you can add it to your home screen or desktop like an app. There is also a Windows desktop version in the Microsoft Store if you prefer an installed app.
No. Install Concrete Volume Calculator and get going - there's nothing to sign up for. The optional Register button lets you leave your name and email for update news.
No - it's a quick sizing sense-check from generic, rounded reference values (a 1.54x dry-volume factor, standard cement/sand/aggregate densities), not a certified mix design. Always verify against the applicable standards and get structural pours designed and checked as required in your jurisdiction.
Yes - metric or imperial units, and a choice of common mix ratios (1:1.5:3, 1:2:4, 1:3:6, or a custom ratio) with 25kg, 50kg or 94lb cement bag sizes.
