Tapered Rectangular Container calculator.
Find capacity when both rectangular dimensions change linearly with height.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
The horizontal cross-sections stay parallel, rectangular and aligned. Simpson’s expression is exact for the quadratic area produced by linear changes of length and width.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Bottom length
- 2 m
- Bottom width
- 1 m
- Top length
- 4 m
- Top width
- 3 m
- Perpendicular height
- 3 m
Tapered container capacity: 19 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 horizontal cross-sections stay parallel, rectangular and aligned. Simpson’s expression is exact for the quadratic area produced by linear changes of length and width.
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.