Arithmetic Sequence Calculator
Find a numbered term and the partial sum of a constant-difference sequence.
Your result
MATHEnter your values and select calculate.
On this page How it works & practical examples
How to use the Arithmetic Sequence Calculator
Number the first entered term as term one. A negative difference gives a decreasing sequence; a zero difference gives a constant sequence.
The calculation
Worked example
Starting at 2 with difference 3, the fifth term is 14 and the sum of the first five terms is 40.
Assumptions and limits
Uses finite floating-point arithmetic and supports up to one million terms by formula. It does not check whether an observed data series truly follows the model.
Common questions
Which inputs should I use?
Number the first entered term as term one. A negative difference gives a decreasing sequence; a zero difference gives a constant sequence.
What does the result exclude?
Uses finite floating-point arithmetic and supports up to one million terms by formula. It does not check whether an observed data series truly follows the model.