Simple Interest Calculator illustration

Simple Interest Calculator

Calculates simple (non-compounding) interest on a principal over a period and contrasts it with what annual compounding would produce, with a side-by-side growth chart.

Notes

  • Simple interest: I = P·r·t. Short private loans and some bonds use it; almost everything else compounds.
  • This is an educational estimate, not financial advice; talk to a qualified adviser before making money decisions.