Cylinder Scale Calculator
Scale the radius and height of a right circular cylinder by the same non-negative factor. The two output dimensions stay in their input order.
How to use Cylinder Scale Calculator
1. Choose Measurement Unit, then enter Radius, Height, Scale Factor without a unit suffix. 2. Use the selected ordinary, square or cubic unit for each measurement as explained below; changing the selector relabels inputs and does not convert them. 3. Select Calculate, or press Enter, and read scaled cylinder dimensions. 4. Select Select Copy result to copy the answer, or Reset to clear the form.
Why use this tool?
Resize a cylindrical design uniformly while keeping the radius-to-height proportion unchanged.
How the calculation works
New radius = radius × factor and new height = height × factor. Uniform scaling changes surface area by factor² and volume by factor³. Results use up to six decimal places. Tiny nonzero results below 0.000001 use scientific notation with six significant digits. Browser floating-point arithmetic can introduce small rounding differences. Inputs and calculated magnitudes must not exceed 9,007,199,254,740,991. Negative physical measurements and arithmetic underflow are rejected. Zero dimensions are treated as a degenerate limit where the formula allows them; divisors and sides of an actual triangle must be positive. Formula reference: https://openstax.org/books/prealgebra-2e/pages/c-geometric-formulas
Example
Radius = 5 cm, Height = 10 cm and Scale Factor = 2 give 10 × 20 cm: radius first, then height.
Practical tip
The first output is a radius, not a diameter. Doubling all lengths makes the volume eight times as large.
Frequently asked questions
Which dimension comes first?
The output shows scaled radius × scaled height. To obtain the diameter, double the first value.
Does this preserve the cylinder’s volume?
A factor of 1 preserves it. Other factors change volume by the cube of the factor; a factor of 2 gives eight times the volume.
Does changing Measurement Unit convert my numbers?
No. The selector states the unit of the numbers you enter and labels the answer. Convert measurements first when changing units. Area inputs use square units and volume inputs use cubic units; result precision follows the rounding method above.