Area of a circle Calculator

Calculates the area and circumference of a circle given the radius or diameter.

Area of a circle

area S
    1.  
circumference L
    1.  
    Area of a circle
    [1-10] /28Disp-Num
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    [1]  2020/09/16 02:24   Female / 60 years old level or over / Self-employed people / Useful /
    Purpose of use
    determining the area of a cord of wood
    [2]  2020/08/26 00:40   Male / 60 years old level or over / An office worker / A public employee / Very /
    Purpose of use
    comparing area of circular culvert vs area of rectangular box culvert, and provide a printout to concerned landowner.
    [3]  2020/08/06 23:23   Female / Under 20 years old / Elementary school/ Junior high-school student / - /
    Comment/Request
    It was really useful my teacher was amazed to see that I could do this on a calculator
    [4]  2020/07/19 20:56   Female / 20 years old level / Elementary school/ Junior high-school student / Useful /
    Purpose of use
    to understand mathematics
    Comment/Request
    very nice
    [5]  2020/07/13 23:47   Male / 50 years old level / A teacher / A researcher / Useful /
    Purpose of use
    calc area of round metal trough for painting
    [6]  2020/07/07 21:10   Male / 20 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    calculate pizza calories
    [7]  2020/06/25 09:44   Female / 60 years old level or over / Self-employed people / Very /
    Purpose of use
    Rarely have to do calculations. This for the area of a circle of embroidery to calculate thread coverage
    Comment/Request
    Worked well.
    [8]  2020/06/16 18:06   Female / 60 years old level or over / Elementary school/ Junior high-school student / Not at All /
    Purpose of use
    I am able to do these in my head no need of such a useless programamation thingy
    Comment/Request
    i want a refund
    [9]  2020/06/15 20:02   Female / 30 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    Determining the cross sectional area of a wire to calculate the maximum current carrying capabilities of a given voltage for a motor I'm planning to modify.
    [10]  2020/04/05 04:41   Male / 60 years old level or over / High-school/ University/ Grad student / Very /
    Purpose of use
    Calculate areas for gravity feed irrigation system

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