Daily Compound Interest Calculator
See exactly how your money grows when interest compounds every single day. Final balance, total interest, and real annual yield in seconds.
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Why daily compounding wins
Three quick facts about interest that compounds every day.
Interest on interest
Daily compounding means tomorrow's interest earns on today's interest. The more often it compounds, the faster a growing balance builds.
A small edge that grows
Daily beats monthly at the same nominal rate. It looks small for one year and compounds into a real difference over decades.
Know your real yield
The APY is the honest number. It is what you actually earn after all that compounding, and it is always slightly higher than the quoted rate.
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Explore CFD tradingDaily Compound Interest Calculator - Questions
How does daily compound interest work?
Daily compounding means interest is added to your balance every day, and the next day the interest also earns interest. Over time this grows faster than simple interest because you earn on the interest itself.
What is the daily compound interest formula?
The formula is A = P x (1 + r/365)^(365 x t). A is the final balance, P is the starting principal, r is the annual interest rate as a decimal, and t is the time in years. We compound 365 times a year.
How much does daily compounding add over monthly?
Daily compounding pays slightly more than monthly for the same nominal rate. The gain is small on short timelines and grows with time and rate. The calculator shows your effective annual yield, which reflects the real daily-compound return.
What is the effective annual rate (APY)?
The effective annual rate, or APY, is the real yearly return after daily compounding. For example a 5% nominal rate compounded daily yields about 5.13% a year because interest compounds on interest.
Is this calculator financial advice?
No. The result is a mathematical estimate only. Actual returns depend on fees, taxes, and how rates change. Use it to compare scenarios, not as investment advice.