Arithmetic & Geometric Sequence Calculator
Build a transparent arithmetic & geometric sequence scenario with labeled inputs, immediate results, and no hidden assumptions.
Verify this calculatorMaintained
See what the result uses—and what it cannot know.
Sumvoro calculates deterministically from the visible inputs. It does not invent lender terms, local rules, market values, medical facts, or professional judgments.
- 1 · InputsCheck every entered value against the latest statement, quote, measurement, or official source.
- 2 · Formula
Arithmetic: aₙ = a₁ + (n−1)d. Geometric: aₙ = a₁rⁿ⁻¹. - 3 · SensitivityUse Insights to run a lower and higher case. If the conclusion changes easily, collect better information or leave more margin.
- 4 · ScopeThis tool is maintained and covered by automated calculation tests. Provider timing, rounding, and omitted facts can still change a real-world result.
- Formula release
- 2026.10-r4
- Release date
- October 10, 2026
- Review status
- Maintained
- Source review
- September 12, 2026
Optional readingLearn how this calculator works
How the arithmetic & geometric sequence calculator works
Find arithmetic and geometric nth terms and finite sums.
Arithmetic: aₙ = a₁ + (n−1)d. Geometric: aₙ = a₁rⁿ⁻¹.
Read our calculation methodology and limitations.
Example
Begin with the worked example, then replace one field at a time with figures from your statement, quote, budget, or lesson.
What affects the result
- The term number is rounded to a positive integer.
- Large ratios and term counts can exceed practical numeric ranges.
Frequently asked questions
What should I enter?
Use the label beside each field and enter current figures from your own documents whenever possible.
Is this result a quote or professional recommendation?
No. It is an educational planning estimate based only on the values shown. Verify important financial, legal, tax, benefits, and contract details with the appropriate source.