About YieldKit

YieldKit is a small set of free calculators for anyone trying to make sense of savings and CD rates. The question we answer is simple: given a nominal rate and a compounding schedule, what do I actually earn? Every calculation runs locally in your browser — your numbers never leave the page.

The formulas are the standard textbook ones for effective annual rate, certificates of deposit, and annuity-style savings growth. They are educational illustrations, not personalized financial advice.