💰 Savings Calculator
Project how your savings grow over time with compound interest. See your final balance, total contributions, and interest earned — all in one interactive chart.
Enter your starting amount, monthly contribution, interest rate, and time horizon to see your savings grow with compound interest. An interactive chart breaks down your final balance into total contributions and total interest earned. Adjust any slider or input and the projection updates instantly. All calculations happen locally in your browser.
📋 When to Use the Savings Calculator
Savers project how a one-time deposit plus regular monthly contributions grow under compound interest — ideal for visualizing an emergency fund, down payment, or education savings goal. Compare different scenarios: a high-yield savings account (~4% APY) vs. a conservative investment portfolio (5–7%). The line chart shows your balance trajectory year by year, making it easy to see when you'll hit a target number. ⚠️ This calculator uses constant-rate compound interest projections — actual savings account rates change, and investment returns fluctuate. This is not financial advice.
⚙️ How the Savings Calculator Works
The calculator applies the future value with periodic contributions formula: FV = P × (1+r)^n + PMT × ((1+r)^n − 1) / r, where P = initial deposit, PMT = monthly contribution, r = monthly interest rate (annual ÷ 12), and n = total months (years × 12). For zero-rate scenarios: FV = P + PMT × n. The first term P × (1+r)^n grows your initial deposit, while the second term PMT × ((1+r)^n − 1) / r accumulates your monthly contributions with compound interest. Year-by-year data points are plotted on a Chart.js line graph showing the balance growth trajectory. Total contributions = P + PMT × n; interest earned = FV − contributions. All computation is client-side only.
📖 How to Use the Savings Calculator
- Enter your starting point — Input how much you already have saved as your Initial Deposit. If you're starting from zero, just leave it at $0.
- Set your monthly contribution — Enter the amount you plan to save each month. Even small, consistent contributions add up significantly over time thanks to compounding.
- Choose your interest rate and timeline — Input your expected annual interest rate (e.g., 5% for a high-yield savings account or conservative investment) and how many years you'll save.
- Review your results — The calculator instantly shows your final balance, total money you put in, and how much came from interest. Use the chart to see your savings trajectory year by year.
❓ Frequently Asked Questions
How is compound interest calculated?
This calculator uses the future value formula with monthly compounding: FV = P × (1 + r)^n + PMT × ((1 + r)^n − 1) / r, where P is your initial deposit, PMT is your monthly contribution, r is the monthly interest rate (annual rate ÷ 12), and n is the total number of months.
Does this account for inflation or taxes?
No, this calculator shows nominal (pre-inflation) values. It does not account for taxes on interest or investment gains. For inflation-adjusted projections, check out our Inflation Calculator.
What interest rate should I use?
This depends on your savings vehicle. High-yield savings accounts currently offer around 3–5% APY. Conservative investment portfolios historically return 5–7% annually. Use a rate that matches your actual savings or investment strategy.
Can I use this for retirement planning?
Absolutely! While this calculator gives you a straightforward savings projection, for retirement-specific planning with tax advantages and withdrawal strategies, try our dedicated Retirement Calculator.