Enter any consecutive terms of a sequence into the calculator to determine the common ratio.

Common Ratio Formula

The following equation is used to calculate the common ratio of a sequence of numbers.

r = a(n+1)/ a(n)

  • Where r is the common ratio
  • a (n+1) is the number following a(n)
  • a(n) is an arbitrary number in a sequence.

Common Ratio Definition

A common ratio is defined as the ratio of a set of consecutive numbers in a sequence.

Common Ratio Example

How to calculate a common ratio?

  1. First, determine the first number.

    Determine the first number in the sequence.

  2. Next, determine another number.

    Select another number in the sequence.

  3. Finally, calculate the common ratio.

    Calculate the common ratio using the equation above.


What is a common ratio?

A common ratio is a term used to describe the ratio of consecutive terms in a sequence of numbers.

What is a geometric sequence?

A sequence is any set of numbers that can be described using a formula such that any subsequent number can be calculated using the same formula.

common ratio calculator
common ratio formula