Money Market Calculator
Money Market Account Calculator works out Future value and Total you put in from Starting amount, Annual interest rate and The rate above is. The default figures on this page give future value of 11,248.64; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
6 steps
- The 4% quoted is an APY, so the nominal rate behind it is 12 x ((1 + 4%)^(1/12) - 1) = 3.928488%.
- Rate per compounding period = 3.928488% / 12 compounding monthly (12 a year).
- Effective annual yield = (1 + r/n)^n - 1 = 4%.
- No recurring contributions, so the balance grows from the 10000 starting amount alone.
- Future value after 3 years = 11248.64, of which 1248.64 is compound interest on 10000 paid in.
- At this yield the balance doubles every ln(2)/ln(1+i) = 17.67 years.
Year-by-year balancetable
| year | contributions | interest | balance |
|---|---|---|---|
| 1 | 0 | 400 | 10,400 |
| 2 | 0 | 416 | 10,816 |
| 3 | 0 | 432.64 | 11,248.64 |
Its 9 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
4 sources
Keep this result
Save it, change one figure, then compare the two
The calculation stays free. Save this scenario, adjust one assumption, save that too, and put them side by side to see exactly what the change costs you. A free account keeps 5 scenarios and 2 comparisons; Personal makes both unlimited and adds exports and private links. Nothing is saved unless you press Save.
What the Money Market Account Calculator calculates
Projects the future value of a lump sum plus recurring contributions under any compounding frequency, and splits the result into principal, contributions and compound interest.
How to use this Money Market Account Calculator
Enter Starting amount, Annual interest rate, The rate above is and Time invested. Future value updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Future value, Total you put in and Of which contributions.
The method follows Compound interest formula A = P(1 + r/n)^(nt), and the future value of an annuity FV = PMT[((1+i)^N - 1)/i], US Securities and Exchange Commission (Investor.gov) - Compound Interest Calculator, 12 CFR Part 1030 (Regulation DD), Appendix A - Annual Percentage Yield Calculation and Pag-IBIG Fund - Modified Pag-IBIG II (MP2) Savings Program.
What you can compare
Change one input at a time to see how it affects Future value, Total you put in and Of which contributions. The inputs you can vary are Starting amount, Annual interest rate, The rate above is, Time invested, Compounding frequency and Regular contribution.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
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Frequently asked questions
How much will $100,000 make in a money market account?
The calculation is free and does not require an account. An account is only needed for optional features such as saving, comparing, exporting, or sharing supported scenarios.
Where can I get 7% interest on my money?
Projects the future value of a lump sum plus recurring contributions under any compounding frequency, and splits the result into principal, contributions and compound interest. On the figures this page opens with — starting amount 10,000, annual interest rate 5% and time invested 10 years — the future value is 11,248.64. Put your own figures in their place and the working updates beside the result.
How to calculate money market?
Projects the future value of a lump sum plus recurring contributions under any compounding frequency, and splits the result into principal, contributions and compound interest. Open “How this is worked out” beside the result to see each step for your own figures.
How much will $50,000 make in a money market account?
It needs Starting amount, Annual interest rate, The rate above is, Time invested, Compounding frequency and Regular contribution. Nothing else is required, and the figures stay in your browser.
What information do I need for the Money Market Account Calculator?
You need Starting amount, Annual interest rate, The rate above is, Time invested, Compounding frequency, Regular contribution, Contribution frequency and Contributions are made. The page opens with default figures that give future value of 11,248.64, so you can see the scale before entering your own.
What does this Money Market Account Calculator show?
It shows Future value, Total you put in, Of which contributions, Compound interest earned, Effective annual yield (APY), Equivalent nominal annual rate, Multiple of what you put in and Balance after tax on interest, with the working and any warnings for your entries.