Fibonacci Calculator — nth Term & Sum

Enter n to get F(n), the cumulative sum, and the golden-ratio approximation.

Examples

What is the golden ratio?

φ ≈ 1.618, the limit of F(n+1)/F(n).

Calculate percentages, find what percent one number is of another, and track percentage c…

Solve complex math problems instantly with our free online scientific calculator, featuri…

Easily add, subtract, multiply, and divide fractions. Get the simplified fractional resul…

Simplify any ratio A:B to its lowest terms.

Solve for the missing value in a proportion A:B = C:D.