Arithmetic Series Online Calculator

Online calculator to calculate the sum of the first n terms and the nth term of an arithmetic sequence .

If \( A_1, A_2, ... , A_n, ... \) is an arithmetic sequence with common difference \( d \), this calculator calculates the sum \( S_n \) given by

\[ S_n = A_1 + A_2 + ... + A_n = \dfrac{n}{2}(A_1 + A_n) \]


How to use the calculator

1 - Enter the first term \( A_1 \) in the sequence, the common difference \( d \) and \( n \) the number of terms in the sum then press enter. \( A_1 \) and \( d \) may entered as integers, decimals or fractions and n must be a positive integer.

$A_1 =$ , $d = $ , $ n= $

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