Math Calculators

Fibonacci Calculator

Find the nth number in the Fibonacci sequence, where each number is the sum of the two before it.

Fibonacci number —

Sequence —

About the Fibonacci Calculator

The Fibonacci sequence starts with 0 and 1, and every following number is the sum of the two before it: 0, 1, 1, 2, 3, 5, 8, 13…

Formula: F(n) = F(n−1) + F(n−2), with F(0) = 0 and F(1) = 1

The Fibonacci sequence appears throughout nature, art and computer science, and is closely tied to the golden ratio.