Savings Calculator
Project a savings balance from a starting amount, monthly deposits and interest rate.
Educational estimate only. This is not financial, investment, tax, legal or lending advice, a quote or a guarantee. Read the disclaimer.
Your inputs
Illustrative growth by year.
How this calculator works
P is the starting balance, C is the contribution at each month-end, r is the entered annual percentage divided by 100 and then 12, and n is years × 12. The rate is treated as a nominal annual rate, not APY or an effective annual return. Returns are constant in this illustration; no taxes, fees, inflation, withdrawals or market volatility are modeled. Fractional years use fractional exponents; the chart shows completed years only. Growth is FV minus the starting balance and deposits. Bank daily accrual, tiered balances and changing rates may differ.
Dollar results are in USD and generally rounded to the nearest whole dollar; salary equivalents and percentage outputs use two decimal places. Calculations retain JavaScript floating-point precision between steps rather than rounding every payment to cents. Displayed components may not sum exactly to displayed totals. Payoff times use whole monthly payment periods. Defaults are examples, not current rates or recommendations.
Full methodology · About the publisher and corrections
Content and calculation checks: October 12, 2026. Educational estimates; no independent professional certification is claimed.
Worked example: $5,000 plus $250 per month
With $5,000 already saved, monthly deposits of $250, a 4% annual rate and a 10-year horizon, the default model reaches about $44,267. You contribute $35,000 in total, while the modeled interest/growth contributes about $9,267.
Bank products may quote APY and may compound differently from this calculator’s nominal annual-rate assumption.
Practical guide
Use the calculator for savings goals
- Start with a realistic monthly deposit you can automate.
- Test a lower rate if the goal must be conservative or guaranteed.
- Use the time horizon to see how delaying contributions changes the result.
- For return-focused investing scenarios, use the Investment Calculator.
How to use the result
Change one assumption at a time to compare scenarios. For example, test a lower rate, larger contribution, different term or extra payment. This makes the calculator most useful as a decision-support tool rather than a single-number answer.
Important financial decisions can depend on taxes, fees, eligibility rules, lender policies, market returns and personal circumstances that this simplified calculator does not capture.
Frequently asked questions
Is this savings calculator free?
Yes. SumStride calculators are free to use and do not require an account.
Are the results exact?
No. Results are estimates based on the values you enter and the assumptions described on this page. Real-world fees, taxes, rates, policies and timing can differ.
Does SumStride save my inputs?
No account is required. The calculator runs in your browser; SumStride does not need your entered values to perform the calculation.