Online calculator for calculating a Fibonacci number
This calculator returns a Fibonacci number from the Fibonacci series for the given index. Enter the index you are looking for and click the 'Calculate' button.
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The Fibonacci sequence is the infinite sequence of numbers which either begins with the double number 1 or is more often provided with a leading number 0. The sum of two consecutive numbers results in the following number:
The formula calculates the Fibonacci number at the index from a series with a leading number 0. The above calculator also used this formula.
\(\displaystyle F_n=\frac{(1+\sqrt{5})^n-(1-\sqrt{5})^n}{2^n\sqrt{5}} \)
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