Concrete Calculator: Mix+Bags

Poured a slab and ended up with six extra bags in the garage? Or ran short on a Sunday pour? Concrete Calculator gives you the exact bag count and cubic yardage before you leave for the supply yard — no guessing, no waste.

TYPE THE DIMENSIONS. READ THE ANSWER.

1. Concrete Slab — length × width × thickness (feet & inches), instantly converted to cubic yards, 60 lb or 80 lb premix bags, and mixing water needed.
2. Column & Footing — round sonotube or rectangular forms, any count; ideal for deck posts, fence posts and foundation footings.
3. Bags vs. Truck — for small pours the app tells you exactly how many bags; for large pours it shows when a ready-mix truck order makes more sense.
4. Safety Margin — every result shows a separate +10% buffer for spillage, irregular subgrade and slight overpouring at edges.
5. Gravel & Sand — surface area × depth to cubic yards and tons, by material density.
6. Bricks & Block — wall area, unit size and joint thickness to unit count and mortar bags.
7. Tile & Paint — bonus calculators for the bathroom remodel you do right after the footing is done.
8. Imperial & Metric — switch anytime without restarting; feet/inches or meters.

BUILT FOR THE JOB SITE
Works fully offline in a basement or on a site with no signal. No account, no signup, no internet required. Large tap targets so you can use it with work gloves on. Copy any result and paste it directly into a text to your ready-mix supplier.

WHO USES IT
Contractors pricing a driveway, patio or foundation before quoting. DIYers who need to know bags vs. truck before the hardware store run. Remodelers tiling a bathroom or painting a room who want one app for every job-site material estimate.

WHY THIS APP VS. THE REST
Most concrete calculators give you one number. This one gives you cubic yards AND bags AND the +10% safety margin AND the water needed — in the same screen. Eight jobsite calculators in one app, each with unit conversion built in.

All results are planning estimates. Confirm quantities, mix design and structural requirements with your supplier or engineer, and follow local building codes.


More ways to use it

• Concrete volume calculator in cubic meters or cubic feet
• Bags of concrete mix calculator for slabs, footings and columns
• Rebar and wire mesh estimator
• Concrete mix ratio: 1:2:4 cement, sand and gravel
• Construction material estimator
• Offline civil engineering calculator

Recent changes:
Already bought Pro? It stays yours for life, with nothing more to pay.

The app is now translated into 30 languages instead of 9.

Pro is now a weekly subscription starting with a 7-day free trial. Ads keep showing during the trial; once the subscription is active, they are removed. Cancel any time in Google Play.