Number Sequence Calculator

Name: Number Sequence Calculator
Rating: 4.9 (892 reviews)

Find nth term and sum of arithmetic or geometric sequences.

Calculator

First Term (a₁)

Sequence Type

Common Difference / Ratio (d or r)

Number of Terms (n)

Result

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Arithmetic: aₙ = a + (n-1)d, Sum = n/2 × (2a + (n-1)d). Geometric: aₙ = a × r^(n-1), Sum = a(r^n − 1)/(r − 1). Used in finance (EMI), biology (population growth), and physics.