Arithmetic Progression Calculator
This Arithmetic Progression turns the figures for arithmetic Progression into a result you can review. Keep the inputs, units and time period consistent.
nth term and sum
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How it works
nth term aₙ = a + (n-1)d. Sum Sₙ = n/2 [2a + (n-1)d].How to use the Arithmetic Progression
Enter the requested values and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options.
Review the assumptions on the page and confirm any result that affects money, safety, technical work or another important decision.
Frequently Asked Questions
What is the common difference?
It is the fixed amount added to each term to get the next term, for example 3 in 2, 5, 8, 11.
What information should I enter?
Use the input labels as a guide and enter figures from the same situation, time period and units wherever possible.
Can I use the result as an exact answer?
Treat it as an estimate or check unless the page and the rules that apply to you confirm otherwise. Rounding, fees and personal details can change the final result.