Configure Investment Parameters

Select your currency, input the starting principal, interest rate, and duration (days, months, or years). Customize the daily reinvest rate percentage and choose whether to exclude weekends.

Execute Daily Compounding

Click the 'Calculate' button to run the granular compounding algorithms over your exact timeline.

Analyze Daily Growth Breakdown

Review your total investment value, accumulated earnings, net profit percentage, and explore structured daily, weekly, monthly, and yearly breakdowns.

What is Daily Compound Interest?

Daily compound interest works by calculating your earned interest every single day and immediately adding it to your balance. The next day, interest is calculated on this new, higher balance. This rapid daily cycle allows your money to grow at an accelerated pace compared to monthly, quarterly, or annual compounding frequencies.

Mathematical Formulas & Calculations

When utilizing a fixed daily interest rate, the standard formula is: $$A = P(1+r)^t$$ Where A is the future value, P is the principal, r is the daily interest rate (expressed as a decimal), and t is the total number of compounding days.

Example: Investing $1,000 at a fixed 0.4% daily rate for 365 days yields: $$A = 1000 \times (1.004)^{365} = $4,293.44$$ Total interest earned equals $3,293.44.

If your baseline is an annual rate instead, the formula adjusts to: $$A = P(1 + \frac{r}{365})^{365t}$$

Daily Reinvestment & Weekend Options

Daily Reinvest Rate
You can precisely choose what percentage of daily interest to reinvest. For instance, selecting an 80% reinvestment rate means 80% remains inside your principal pool to continue compounding, while the remaining 20% is separated as cash distributions.

Excluding Weekends
If your asset class only operates on business days (like traditional stock markets), you can toggle weekend exclusions. Compounding for one calendar year minus weekends alters your calculation parameters to approximately 261 business days instead of 365.

Real-World Financial Applications

Savings & Fixed Deposits: High-yield savings accounts, money market funds, and Certificates of Deposit (CDs) frequently calculate accruals on a daily compounding structure to benefit savers.

Margin Trading & Derivatives: When trading using Forex, CFDs, or cryptocurrency options, daily financing fees or compounding yields apply dynamically. Note that margin trading carries exceptional risk, and losses can outpace your initial capital.