APY Comparison Calculator
Compare two savings accounts over any period.
Enter your values
Enter the balance in $.
Enter the account a apy in %.
Enter the account b apy in %.
Enter the years you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Extra earned by switching
- $2,456.36
- Account A interest
- $301.50
- Account B interest
- $2,757.86
- Account B final balance
- $22,757.86
Quick answer
The higher APY earns more, and the gap compounds — the difference grows faster the longer you leave the money.
interest = balance x ((1+APY)^years - 1)
At a glance
| What it does | Compare two savings accounts over any period. |
|---|---|
| Category | Finance |
| Inputs needed | Balance, Account A APY, Account B APY, Years |
| Main output | Extra earned by switching |
| Formula | interest = balance x ((1+APY)^years - 1) |
| Cost | Free — no sign-up, no download |
How to use the APY Comparison Calculator
- 1Enter the balance you would move.
- 2Enter both advertised APYs.
- 3Check for minimum balances or fees before switching.
Inputs explained
- Balance($)
- Enter the balance in $.
- Account A APY(%)
- Enter the account a apy in %.
- Account B APY(%)
- Enter the account b apy in %.
- Years
- Enter the years you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Balance20000 $
- Account A APY0.5 %
- Account B APY4.4 %
- Years3
Results
- Extra earned by switching$2,456.36
- Account A interest$301.50
- Account B interest$2,757.86
- Account B final balance$22,757.86
Frequently asked questions
Is APY the same as interest rate?
APY includes compounding, so it is always at least as high as the nominal rate.
Is switching worth the hassle?
Usually yes above about $5,000 — the yearly gap often pays for a weekend.
What do I need to enter into the APY Comparison Calculator?
Just 4 values: balance, account a apy, account b apy, years. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the APY Comparison Calculator work out the answer?
The higher APY earns more, and the gap compounds — the difference grows faster the longer you leave the money. It applies the formula interest = balance x ((1+APY)^years - 1) and shows the working so you can check each step by hand.
Is the APY Comparison Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.