Compound Interest Explained: The Formula, the Calculator Inputs and the History

Put 1,000 dollars at 5% a year and after two years you have 1,102.50, not 1,100. This explainer covers simple versus compound interest, the inputs of the SEC's investor.gov compound interest calculator, the accumulation formula A = P(1 + r/n)^(nt), a short history from a Babylonian clay tablet to Jacob Bernoulli, and what happens when compounding becomes continuous. Sources: https://en.wikipedia.org/wiki/Compound_interest and https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator Subscribe to The Money Blueprint for more money explainers. AI disclosure: this video was produced with AI tools (AI-generated narration and visuals), based on the public sources above. Educational only, not financial advice.

Added 20 Oct 2026