Pi Experiments Calculator

Your details

Select the physical experiment you performed or want to simulate.
The measured circumference of any circular object.
cm
The measured diameter of the same circular object.
cm
Your estimate of piExcellent estimate (< 0.1% error)
3.14

The value of pi derived from your experimental measurements.

Error from true pi0.001%
True value of pi3.14159265
Absolute error0.001593
3.14
Too low<3Low3-3.1Close to pi3.1-3.18High3.18-3.25Too high3.25+

Using the circumference ratio method, you estimated pi as 3.14000, a 0.051% error.

  • The true value of pi is 3.14159265...; your estimate differs by 0.001593.
  • Measurement precision matters most here. A 1 mm error on a 20 cm circle produces roughly 0.5% error in the pi estimate.

Next stepExcellent result. Try increasing sample size or precision to push the error below 0.1%.

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