Savings Goal Calculator

How to use Savings Goal Calculator

The current balance grows with monthly compounding. Equal deposits are made at the end of each month, and the annuity future-value factor determines the required deposit.

1. Enter current savings, target balance, nominal annual rate (%), months to save.
2. Check that the input follows the stated limits and uses consistent units.
3. Run the calculator, review the result, then copy or download it.

Good to know

• Nonnegative balances and annual rate 0–1,000%, with 1–1,200 whole months. Returns are fixed assumptions; no withdrawals or fees are included.
• Decimal inputs have at most 120 characters and magnitude from 1e-100 to 1e15, or zero. Floating-point results are rounded to 12 significant digits; extreme derived results may underflow or be rejected. Exact integer results are identified separately.
• Educational estimate with user-entered assumptions, not a quote or financial/tax advice. Rates are hypothetical, fixed, and not fetched. Fees, taxes, inflation, payment-day conventions, and currency rules are excluded unless explicitly entered.