Maths & numbers
Geometric sequence calculator
Find a term and finite sum of a constant-ratio sequence.
A clear answer. Here’s how.
Multiplies each term by the common ratio. Calculates the first n terms iteratively with compensated summation, handling zero, one and negative ratios. Rejects results outside finite-number range. Term numbering starts at 1.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- First term
- 2
- Common ratio
- 3
- Term number / number of terms
- 5
Example result
- Requested term
- 162
- Sum of first n terms
- 242