5 Free Finance Calculators for Personal Budgeting
Start calculating: Explore all free finance tools on Supertools.
1. Loan Interest Calculator
Before signing any loan agreement, understand exactly what you'll pay. Our Loan Interest Calculator computes monthly payments, total interest, and total cost for mortgages, car loans, and personal loans. Adjust the APR slider and loan term to compare scenarios. The amortization table shows exactly how much of each payment goes to principal vs. interest — essential for understanding the true cost of borrowing.
2. Compound Interest Calculator
Compound interest is the most powerful force in personal finance, but it's hard to visualize without a calculator. Our Compound Calculator lets you model investment growth with monthly contributions, adjust for inflation, and see projections over decades. See how starting to invest 5 years earlier can double your retirement savings.
3. ROI Calculator
Whether you're evaluating a marketing campaign, a side business, or a home renovation, you need to know if the investment is worth it. The ROI Calculator computes return on investment, payback period, and net profit. Enter your investment and return, and see the percentage ROI instantly.
4. Salary to Hourly Converter
Job hunting or freelancing? Convert annual salary to hourly, daily, weekly, and monthly rates. Our Salary Converter accounts for vacation days and work hours per week — giving you an accurate hourly rate for comparing job offers or setting freelance rates.
5. VAT/Sales Tax Calculator
Quickly calculate tax-inclusive or tax-exclusive prices for any country's VAT rate. The VAT Calculator works both ways — add tax to a net price or extract tax from a gross price. Useful for business invoicing, e-commerce pricing, and comparing prices across borders.
All calculators are free, no sign-up required. Browse all finance tools →