Arithmetic and Geometric Sequence Calculator
Find the nth term and the sum of an arithmetic or geometric sequence. The result updates as you type, with the working underneath so you can check it.
Your details
Sequence
Result
Term 10
29
- Sum of first n terms
- 155
- Sequence starts
- 2, 5, 8, 11, 14, 17, 20, 23, …
Good to know: aₙ = a₁ + (n−1)d · aₙ = a₁rⁿ⁻¹
About this tool
Formula
aₙ = a₁ + (n−1)d · aₙ = a₁rⁿ⁻¹
Questions people ask
What is the difference between arithmetic and geometric sequences?
An arithmetic sequence adds the same number each time (2, 5, 8…), a geometric one multiplies by the same number (2, 6, 18…).
Related tools
- Quadratic Formula CalculatorSolve ax² + bx + c = 0, including complex roots and the vertex.
- Pythagorean Theorem CalculatorFind a missing side of a right triangle.
- Triangle CalculatorFind area, angles and radii of a triangle from its three sides.
- Circle CalculatorFind area, circumference, radius and diameter from any one of them.
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
Spotted a mistake? Tell us and we'll check it. How we check our calculators