Concrete Calculator: Bags+Cost

About Concrete Calculator: Bags+Cost

Work out how much concrete to order and how many bags that is, before you are standing in the store aisle doing arithmetic. This concrete calculator carries the answer all the way through: concrete volume with your waste allowance already in it, a bag count for every size sold in your region, and bag cost beside delivered cost, so you can see which way to buy each pour. Everything runs on your phone, fully offline.

Key Features

• Every shape you pour: slab calculator, round slabs, footings, walls, square and round columns, Sonotubes, stairs, curb and gutter, and post holes
• Quantities on every shape, so twelve identical piers are one calculation
• Type feet and inches the way you read them off a tape: 12' 6", 4-1/2, or plain metric
• Bags of concrete for every size at once: 40, 50, 60, 80 and 90 lb in the US, 25 and 30 kg in Canada, 20 kg in the UK and Australia, 25 kg in Europe
• Bag yields taken from manufacturer data sheets, including high-yield products like MAXIMIZER with their own real figures
• Waste allowance of 5, 10 or 15 percent, shown beside the exact volume so you never come up short
• Cost both ways: your price per bag against your price per cubic yard delivered, with the cheaper route named
• Projects with running totals: save pours into a named job and get grand total bags and cost
• History that reopens any calculation with the same numbers in the same boxes
• Rebar estimator: bar counts per direction with laps allowed for, answered in sticks to buy
• Reference tables for bag yields, coverage per cubic yard, and control joint spacing

How It Works

1. Pick the shape and type the dimensions straight off your tape
2. Choose a waste allowance and see exact volume beside the recommended order
3. Read the bag count for every size, each with the yield it came from
4. Save the pour into a project, or share the estimate as plain text

Waste goes in first and the bag count rounds up afterwards, so a tight estimate can never leave you one bag short. Project totals round to whole bags once, across the summed job, so five pours do not sell you five part bags.

Why Choose This Concrete Calculator

• Fully offline: the app does not request the internet permission at all, so nothing could be sent anywhere even if it tried
• No ads, no subscriptions, no in-app purchases, and no paid tier holding features back
• No account, no analytics, no tracking of any kind
• Every result carries a "how this was calculated" panel with the formula the app ran and the data sheet it came from
• Bag counts never hide behind a tap: every size sits on the result screen at once

Built for the Jobsite

• Light and dark themes, a text size setting, and big number boxes
• Units, region, prices and waste stay set between sessions
• Fraction chips under each field, because the Android keypad has no slash key
• Real labels for screen readers, respect for your system font size, layouts that hold up in landscape and on a tablet

Your Data Stays With You

• Share any estimate as plain text through the normal share sheet
• Save projects and history as a readable JSON backup file you can keep and move to a new phone
• Removing a pour archives it rather than deleting it, and undo still works an hour later

Whether it is a driveway slab in cubic yards or a run of post holes in metric, this concrete calculator turns dimensions into an order you can hand to a supplier.

This app estimates quantities; it does not replace an engineer. Check the numbers against your own measurements and confirm quantities with your supplier before you order.

Made by a developer who answers email: [email protected]