# Concrete volume calculator

> Estimate slab or cylinder volume with unit-aware inputs.

[Open tool](https://www.toolcabana.com/lb/concrete-volume-calculator) · [Construction and workshop](https://www.toolcabana.com/lb/category/construction-and-workshop)

Tool ID: concrete-volume-calculator. Requested language: lb. Description language: en. Complete guide translation: no; untranslated sections use English.

## Overview (en)

The Concrete volume calculator estimates cubic meters of concrete for a rectangular slab or a cylinder such as a column or post hole. A slab uses length times width times depth; a cylinder uses pi times the radius squared times height. It shows the net volume and the volume with an extra percentage, 5 percent by default, for spillage and uneven ground.

## Supported tasks (en)

Estimate slab or cylinder volume with unit-aware inputs.

## Steps (en)

1. Enter the requested values in the settings panel.
2. Adjust the basic settings, then open Advanced mode for export and fine-tuning options. Custom settings stay active when the panel is closed.
3. Run concrete volume calculator, review the output, then use the available copy or download controls.

## Settings

- Shape (en; key: shape; type: select): slab [en], cylinder [en]
- Length / cylinder diameter (m) (en; key: length; type: number); minimum: 0.0001; maximum: 1000000000000
- Width (m; slab) (en; key: width; type: number); minimum: 0.0001; maximum: 1000000000000
- Depth / cylinder height (m) (en; key: depth; type: number); minimum: 0.0001; maximum: 1000000000000
- Extra (%) (en; key: waste; type: number); minimum: 0; maximum: 100

## Limitations (en)

Local bounded calculations. Numeric inputs must be finite and within the visible ranges. Lists and tables have operation-specific limits. Models, estimates and supplied rates must be checked against your intended use.

## Privacy and connections (en)

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

## Questions (en)

### How much concrete do I need for a slab?

Choose slab and enter length, width and depth in meters. The default 4 m by 3 m slab at 0.1 m deep needs 1.2 cubic meters net, or 1.26 cubic meters with the 5 percent extra.

### How do I calculate concrete for a round column or post hole?

Choose cylinder, enter the diameter in the length field and the height or depth in the depth field. The volume is pi × (diameter ÷ 2)² × height, in cubic meters. The width field is ignored for cylinders.

### How much extra concrete should I order?

The calculator adds a percentage you choose from 0 to 100, with 5 percent as the default. The right margin depends on formwork, ground and delivery; confirm it with your supplier and local requirements.

### Where is my input processed?

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

### What are the input limits?

Local bounded calculations. Numeric inputs must be finite and within the visible ranges. Lists and tables have operation-specific limits. Models, estimates and supplied rates must be checked against your intended use.

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