COMPOUND GROWTH, MADE CLEAR
APY Calculator
See how your savings can grow—with contributions, compounding, and time made visible.
| Period | Balance | Contributions | Interest |
|---|---|---|---|
| Year 1 | $12,899.11 | $12,400.00 | +$499.11 |
| Year 2 | $15,928.67 | $14,800.00 | +$1,128.67 |
| Year 3 | $19,094.57 | $17,200.00 | +$1,894.57 |
How the APY Calculator works
Calculations run entirely in your browser. APY is converted to an effective monthly rate, contributions are added at month-end, and the entered yield is held constant. Results are estimates, not a bank quote.
Small details. Big difference.
APY vs APR: what’s the difference?+
APR is the stated annual rate before compounding. APY includes compounding, so it is the better apples-to-apples number for deposit accounts.
Does daily compounding beat monthly compounding?+
At the same APR, usually yes—slightly. At the same APY, the annual result is the same because APY already captures compounding frequency.
HYSA vs CD: which should I choose?+
A high-yield savings account is typically flexible and variable-rate. A CD usually locks funds and rate for a term. Compare access needs, penalties, rate, and deposit insurance.
How should I compare banks?+
Compare APY on the same date, balance requirements, fees, rate tiers, withdrawal access, deposit insurance, and how long a promotional rate lasts.