Concrete Calculator & Rebar

Calculate concrete volume and how many bags you need for any slab, footing, or pour. Built for DIY and construction projects.

Know exactly how much concrete and how many bags to order before you pour. Enter your dimensions once and get instant volume, weight, and bag counts, in metric or imperial.

Built for slabs, footings, columns, walls, round pours, and stair flights — handy on site or for a weekend DIY job.

KEY FEATURES • Six pour shapes — slab, footing, column, wall, round, and stairs • Bag calculator for cement-only bags or ready-mix bags, by your exact bag size • Rebar spacing estimator for reinforced pours • Save unlimited projects and revisit past estimates anytime • Built-in thickness guide, glossary, and field tips for first-time pourers • Works fully offline, no account required

HOW IT WORKS

1. Pick a shape and enter length, width, and thickness
2. Choose your bag type and rebar spacing
3. Get instant volume, weight, and bag totals, ready for the builders' merchant

Concrete Volume Calculator Premium unlocks every shape, the bag and rebar calculators, and unlimited saved projects, with weekly, yearly, or one-off lifetime options.

Stop over-ordering or running short mid-pour. Download Concrete Volume Calculator and get your numbers right the first time.

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