Money Market Interest Calculator
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Reviewed by Calculator Editorial Team
Calculate the interest earned from a money market account using this calculator. Money market accounts typically offer higher interest rates than savings accounts, and the interest is usually compounded daily. This calculator helps you determine how much interest you'll earn based on your principal amount, annual percentage yield (APY), and the number of compounding periods per year.
How to Use This Calculator
Using the money market interest calculator is simple. Follow these steps:
- Enter the principal amount (the initial deposit or balance in your money market account).
- Input the annual percentage yield (APY) offered by your money market account.
- Select the number of times interest is compounded per year (typically daily for money market accounts).
- Enter the time period in years for which you want to calculate the interest.
- Click the "Calculate" button to see the interest earned and the total amount.
The calculator will display the interest earned and the total amount in your account after the specified time period. You can also view a chart showing the growth of your investment over time.
Formula Used
The money market interest calculator uses the compound interest formula to calculate the interest earned:
Compound Interest Formula
A = P(1 + r/n)nt
Where:
- A = the future value of the investment/loan, including interest
- P = the principal investment amount (the initial deposit or loan amount)
- r = the annual interest rate (APY)
- n = the number of times that interest is compounded per year
- t = the time the money is invested or borrowed for, in years
The interest earned is calculated by subtracting the principal from the future value:
Interest Earned
Interest = A - P
Worked Example
Let's say you deposit $10,000 in a money market account with an APY of 2.5%, and the interest is compounded daily. You want to know how much interest you'll earn after 5 years.
- Principal (P) = $10,000
- APY (r) = 2.5% or 0.025
- Compounding periods per year (n) = 365 (daily)
- Time (t) = 5 years
Using the formula:
Calculation
A = 10000(1 + 0.025/365)365*5
A ≈ $11,335.62
Interest = $11,335.62 - $10,000 = $1,335.62
After 5 years, you would earn approximately $1,335.62 in interest, bringing your total balance to $11,335.62.
Frequently Asked Questions
What is the difference between APR and APY?
APR (Annual Percentage Rate) is the simple annual interest rate, while APY (Annual Percentage Yield) is the real rate of return taking into account the effect of compounding interest. APY is always higher than APR because it reflects the added value of compounding.
How often is interest compounded in a money market account?
Money market accounts typically compound interest daily, which means the interest is calculated and added to the account balance every day. This results in a higher APY compared to accounts that compound interest less frequently.
Can I withdraw money from a money market account without penalty?
Most money market accounts allow you to withdraw money without penalty, but there may be a limit to the number of withdrawals you can make per month. Check with your financial institution for specific rules and restrictions.