How do I use the Sequence Calculator?

Enter the required values and the Sequence Calculator will instantly calculate and display the result. No registration required.

Is the Sequence Calculator free?

Yes, all tools on CalcBOX are completely free with no registration required.

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📐

Calculate terms and sums of arithmetic, geometric, and Fibonacci sequences.

a_n = a₁ + (n-1)d , S_n = n(a₁ + a_n)/2

a₁ (first term)

d (common diff)

n (terms)

a₁₀ = 1 + (10-1)×2 = 19

S₁₀ = 10×(1 + 19)/2 = 100

Showing first 10 terms

a₁1

a₂3

a₃5

a₄7

a₅9

a₆11

a₇13

a₈15

a₉17

a₁₀19

📖How to Use

💡Tips & Knowledge

•Arithmetic: nth term = a + (n−1)d; sum = n(a+l)/2 (a = first term, d = common difference, l = last term)
•Geometric sum formula: a(rⁿ−1)/(r−1). This is also the basis of compound interest calculations
•Fibonacci sequences appear in nature (flower petals, shells) and stock market analysis

All calculations run in your browser. No data is sent to any server.