Volume of a torus Calculator

Calculates the volume and surface area of a torus given the inner and outer radii.

Volume of a torus
inner radius a
outer radius b
    1. b≧a

volume V
surface area S
    Volume of a torus
    [1-10] /58Disp-Num
    [1]  2019/08/30 02:38   Male / 30 years old level / An engineer / Very /
    Purpose of use
    determine volume of o-ring
    [2]  2019/06/14 06:34   Male / 60 years old level or over / A retired person / Very /
    Purpose of use
    Calculating how long it might take to manually pump up one of the new 26 x 4 inch "fat tires" on an MTB.
    [3]  2018/11/27 17:14   Male / 60 years old level or over / Self-employed people / Very /
    Purpose of use
    Volume of o ring.
    Enhancement suggestion. Calculating volume of O ring sold as 13.95 inside diameter and 2.62mm thickness required use of another calculator before use of torus calculator. 15mm by 2mm O ring can be done in my head before using Torus calculator
    [4]  2018/11/16 03:54   Male / 50 years old level / An engineer / Very /
    Purpose of use
    As a demonstration tool
    Since o-rings are typically specified (& sold) by inside diameter and the cross section this would be a very useful (& time saving) option
    [5]  2018/10/02 06:19   Male / 30 years old level / An office worker / A public employee / Very /
    Purpose of use
    Checked against what I guessed would be the volume of a torus. My equation was longer, but this was the simpler version.

    I guessed it was the radius of the torus, times the average of the circumferences.

    Turns out I was right, and after factoring it out, I reduced it to the same equation.
    It's great. A note explaining that it is similar to calculating a cylinder, and that you are averaging the circumference to get the "length" would be nice.
    [6]  2018/09/24 10:25   Female / Under 20 years old / High-school/ University/ Grad student / Useful /
    Purpose of use
    physics experiment
    [7]  2018/09/22 03:58   Female / Under 20 years old / High-school/ University/ Grad student / A little /
    Purpose of use
    Checking a derived equation
    [8]  2018/08/05 14:43   Male / 50 years old level / A teacher / A researcher / Very /
    Purpose of use
    calculate the volume of an inner tube to estimate buoyancy and weight carrying capacity on water
    [9]  2018/07/30 16:19   Male / 60 years old level or over / A teacher / A researcher / Useful /
    Purpose of use
    to determine required depth of fitment for an O ring
    [10]  2018/07/13 23:26   Female / 20 years old level / An engineer / Useful /
    Purpose of use
    calculating the volume of the elbow of a pipe


    Thank you for your questionnaire.
    Sending completion


    To improve this 'Volume of a torus Calculator', please fill in questionnaire.
    Male or Female ?



    Purpose of use?
    Comment/Request (Click here to report a bug).Bug report (Click here to report questionnaire.)
    Calculation bug(Please enter information such as specific input values, calculation result, correct result, and reference materials (URL and documents).)
    Text bug(Please enter information such as wrong and correct texts)
    Your feedback and comments may be posted as customer voice.