Fibonacci Calculator
Find nth Fibonacci Number
Is It a Fibonacci Number?
Formula
F(n) = F(n-1) + F(n-2), F(0)=0, F(1)=1
Frequently Asked Questions
What is the Fibonacci sequence?
The Fibonacci sequence starts with 0, 1, and each subsequent number is the sum of the two preceding ones: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89... The ratio of consecutive terms approaches the golden ratio φ ≈ 1.618.
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