Financial Calculator Suite
Visualize loan amortization and compound interest growth with interactive charts.
How it works
Two calculators in one: a loan amortization tool that shows how extra monthly payments shorten a mortgage or loan and reduce total interest, and a compound interest calculator that projects investment growth with regular contributions — both visualized as interactive charts.
- Switch between the Loan Amortization and Compound Interest tabs.
- For loans: enter the loan amount, interest rate, term, and any extra monthly payment to see interest and time saved.
- For investments: enter an initial deposit, monthly contribution, expected annual return, and time horizon.
- Read the chart and summary cards to compare scenarios, such as with vs. without extra payments.
Common use cases
- Estimating how much interest you'd save by paying extra toward a mortgage or loan each month.
- Projecting investment or savings account growth under different contribution and return assumptions.
- Comparing payoff timelines for a loan with and without accelerated payments.
- Sanity-checking numbers from a lender or financial advisor with an independent calculation.
FAQ
- Are these projections guaranteed?
- No — both calculators are illustrative models based on the numbers you enter (fixed rate, consistent contributions). Actual loan terms and investment returns vary and aren't guaranteed to match these projections.
- What compounding frequency does the calculator assume?
- The loan calculator uses standard monthly amortization; the investment calculator compounds returns with regular monthly contributions. Real-world accounts may compound daily, monthly, or annually depending on the provider.
- Is this financial advice?
- No — this is a general-purpose calculator, not personalized financial, tax, or investment advice. See our Terms & Disclaimer page for details.