Daily Compound Interest Calculator
Calculate the future value of an investment with daily compounding interest. Input principal, annual interest rate, time period, and optional additional contributions.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator computes the future value of an investment with daily compounding interest and optional periodic contributions.
- Enter Principal Amount – The initial sum of money invested (e.g., $1,000). Must be a positive number.
- Enter Annual Interest Rate – The yearly interest rate as a percentage (e.g., 5 for 5%).
- Enter Time Period – The number of years the money will be invested.
- Set Additional Contribution – Optional extra amount added each period. Enter 0 for no contributions.
- Choose Contribution Frequency – How often contributions are made: Daily, Weekly, Monthly, or Yearly.
- Click "Calculate" – The result shows the total future value and a breakdown of the formula used.
Note: All monetary values are in dollars ($). The calculator assumes contributions are made at the beginning of each period. Principal and time cannot both be zero.
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Frequently Asked Questions
Daily compound interest means that interest is calculated and added to the principal balance every day. This results in faster growth compared to monthly or annual compounding.
The future value is calculated using the formula FV = P × (1 + r/n)^(n×t) for the principal, plus the future value of any periodic contributions using an annuity formula.
Yes, you can specify an additional contribution per period (daily, weekly, monthly, or yearly) to see how regular savings affect the final amount.
