Math
Series Sum
Calculator
Σ
Series Type
Arithmetic
Geometric
1+2+…+n
1²+2²+…+n²
1³+2³+…+n³
Custom
First Term (a)
Common Difference (d)
Number of Terms (n)
First Term (a)
Common Ratio (r)
Number of Terms (n)
n (number of terms)
n (number of terms)
n (number of terms)
Numbers (comma or space separated)
S = n/2 × (2a + (n−1)d)
Calculate Sum
Sum Σ
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