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

A kalkulator hasznalata

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.

Mit szamol a keplet

A szamitas ehhez az anyagtipushoz szabvanyos becslesi modellt hasznal.

Hogyan merj

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

Gyakran ismelt kerdesek

How much extra concrete should I order?

Az eredmeny tajekoztato becsles; rendelés előtt ellenorizd a projekt valos feltetelei szerint.

Is bag count exact?

Az eredmeny tajekoztato becsles; rendelés előtt ellenorizd a projekt valos feltetelei szerint.

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?

Az eredmeny tajekoztato becsles; rendelés előtt ellenorizd a projekt valos feltetelei szerint.

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