The Daily Compound Interest calculator computes the money earned over a number of days based on the amount of principal, fixed daily interest rate and the number of days.
INSTRUCTIONS: Choose units and enter the following:
- (P) Principal Amount
- (r) Daily Interest Rate
- (t) Number of Days
Daily Compound Interest (A): The interest amount is returned in U.S. dollars (USD). However, this can be automatically converted to compatible units (other currencies) via the pull-down menu.
The Math / Science
The combined daily interest rate is calculated using the simplified version of the compound interest formula. Multiply your main principal by one and the daily interest rate (such as decimal) increased by the number of days you invest. Subtract the principal from your total if you just want the interest rate.
With some types of investments you may find that your interest rate is accumulated daily, which means you earn interest on both the principal amount and interest accumulated on a daily basis. This often happens in day-to-day trading with bitcoin and other cryptocurrency trading platforms. Since interest is always compounded on a fixed basis, it could mean that the interest you earn is growing faster, as the interest rate per day is higher than the previous day.
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- 30 Year Fixed Interest Rate: 6.27 %
- 15 Year Fixed Interest Rate: 5.76 %
- 7/6 SOFR ARM: [Invalid Constant]