MaterialNeeded.com

Concrete Calculator

Enter the dimensions of your slab, footing, or pad. The calculator returns concrete volume and an approximate count of 80 lb pre-mixed bags for small pours.

Last updated: Reviewed by , Editorial review for field workflows and ordering assumptions.

For larger pours, compare results with the ready mix concrete calculator. For reinforcing steel, use the rebar calculator. For boards used in bracing and temporary forms, see the lumber calculator.

Step 1: Units

Step 2

Enter project measurements

Use decimals if needed (e.g. 3.5).

Step 3

Cum folosesti acest calculator

Measure the longest inside dimensions of your forms. Enter depth as the finished thickness. Add a waste percentage if the site is uneven or spillage is likely.

Ce calculeaza formula

Calculul foloseste un model standard de estimare pentru acest tip de material.

Cum masori

Use a tape on parallel inside faces of the forms. For slopes, measure average depth or break the pour into simple rectangles.

Intrebari frecvente

How much extra concrete should I order?

Rezultatul este orientativ; verifica valorile in functie de conditiile reale inainte de comanda.

Is bag count exact?

Rezultatul este orientativ; verifica valorile in functie de conditiile reale inainte de comanda.

When should I order ready-mix instead?

Generally over roughly 1 cubic yard on site, ready-mix is less labor than hand-mixing bags.

Does this include reinforcement?

Rezultatul este orientativ; verifica valorile in functie de conditiile reale inainte de comanda.

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