Concrete Calculator Measure once. Order clearly.

Whole-project material planning

Concrete Calculator

Volume, bags, ready-mix, listed cost, and effort — for the whole pour, not one shape at a time.

Local-only math. No account, upload, tracking script, or hidden price feed.

Project

Measure the pour

1 section
10 ft
10 ft
4 in
identical slabs
Quick thickness
Input check Drawn to scale
10 ft 10 ft thickness 4 in
A square top view helps catch swapped or mistyped dimensions.
%
Prices & supplier rulesExample inputs — replace with a retailer receipt or supplier quote Example

Every visible line is included; blank means not priced and $0 means intentionally free or already owned.

Bag prices
Ready-mix quote
Mixer & transport assumptionsTurn bag count into a feasibility check Editable

Use actual usable mixer output and the vehicle's door-jamb/manual payload. These are planning inputs, not productivity or safety ratings.

Base & reinforcement takeoffOptional material counts from your explicit layout — no structural recommendation Off

Optional takeoffs are off. No spacing or material is recommended by the calculator.

Method & limits

Every number keeps its assumption attached.

01

Combine, then round

All valid sections become one net volume. Waste is applied once. Each bag size and ready-mix order then rounds independently.

02

Use one named bag profile

Default 40/50/60/80 lb yields and water ranges come from QUIKRETE Concrete Mix No. 1101, reviewed August 2026. Check your product label.

03

Keep pricing honest

Supplier increments, minimums, capacity, delivery, short-load rules, and every compared fee stay visible and editable. No national-price claim is used.

04

Measure material, not structure

This tool does not choose PSI, thickness, frost depth, reinforcement, load design, access plan, or code compliance. Confirm those separately.

Bag profile source Unit conversion source

Reset project

Return to the patio example?

This replaces all sections, waste, prices, effort, and optional takeoffs. You can undo once after resetting.

Share project

Copy a restorable project link

Geometry and units are included by default. The calculation still runs locally when the link opens.

Privacy & terms

Privacy

No account, cookie, tracking SDK, fingerprint, upload, database, or third-party page resource is used. Preferred units and editable procurement settings may be saved in local browser storage. A share link contains bounded project geometry; prices are included only when you check the explicit option.

Terms and limitations

Outputs are planning estimates based on entered dimensions, visible assumptions, one named bag profile, and configurable supplier rules. Verify measurements, product labels, retailer prices, supplier quote, vehicle payload, mixer capacity, site conditions, taxes, access, placement, finishing, and local requirements before purchase or work.

The calculator does not provide structural, engineering, building-code, excavation, utility-location, reinforcement, load, mix-design, safety, or professional advice. Use a qualified professional and local authorities where required.