Torus Calculator
Find a torus (ring) volume and surface area.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This tool calculates the volume and surface area of a torus — the donut-shaped surface formed by rotating a circle around an axis that doesn't intersect it — from two measurements: the center radius (the distance from the torus's central axis to the middle of the tube) and the tube radius (the radius of the circular cross-section itself). These two numbers alone fully determine the shape, since a torus is just a circle swept in a circular path.
It is used by students and engineers working through solid geometry problems that go beyond the basic sphere, cylinder and cone cases, and by people in mechanical design and manufacturing contexts — calculating the volume of a rubber O-ring or gasket, the material needed for a ring-shaped component, or the capacity of a torus-shaped tank — where the donut geometry shows up in the physical part being designed or specified.
Was this helpful?
Popular calculators
Loan Calculator
Monthly payment, total interest and full amortization schedule.
Percentage Calculator
Percent change, percent of, and ratio calculations.
Discount Calculator
Calculate final price, savings, and discount amount.
BMI Calculator
Body mass index from height and weight (metric or imperial).
Age Calculator
Compute your exact age in years, months and days from a birth date.
Compound Interest Calculator
Calculate the final amount and interest earned with compounding.
All Calculators
No calculators found
Comments (0)