MEASURE ONCE. PLAN YOUR PURCHASE.

Tapered Base and Shaft Volume calculator.

Combine a straight cylindrical shaft with a specified tapered base.

CONCRETE

Your inputs

Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.

Specified shaft diameter

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Shaft height above taper

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Specified base diameter

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Taper height

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Identical components

Purchase allowance

Shortcuts only; choose your own allowance above.

Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

YOUR ESTIMATE

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A clear estimate starts here.

Enter your dimensions and product details to see the quantity and purchase breakdown.

CONTINUE YOUR PLAN

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Keep the quantity, then use another tool for the remaining parts of your purchase.

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Formula and assumptions

BEHIND THE NUMBERS

How this calculation works.

The shaft begins at the top of the taper. Its height excludes the taper, preventing overlap. This is volume takeoff from supplied dimensions, never footing-size selection.

V = πr²Hs + πHt(r²+rR+R²)/3Calculated with normalised units

A worked example

Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.

Specified shaft diameter: 1 m
Shaft height above taper: 2 m
Specified base diameter: 2 m
Taper height: 1 m
Identical components: 1
Purchase allowance: 0 %

Concrete volume: 3.4 m³

Before you purchase

Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.

The shaft begins at the top of the taper. Its height excludes the taper, preventing overlap. This is volume takeoff from supplied dimensions, never footing-size selection.

Dimensions, quantities, prices, timing and product properties are supplied by you. This tool does not select construction specifications or assess structural, electrical or hydraulic suitability.

Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.