Free Financial Tools

Professional calculators for smarter financial decisions. No registration, no data stored — everything runs in your browser.

Visualize your income, expenses, and savings with an interactive Sankey diagram.

Calculate IRPF on shares, funds, or property sales using 2026 tax brackets.

Analyze the gross and net yield of your rental property investment.

See how your money grows over time with compound interest and regular contributions.

Calculate how regular monthly investments grow into long-term wealth.

Understand how inflation erodes your purchasing power over time.

Convert your gross salary to net take-home pay for Spain or Germany.

Simulate your mortgage: monthly payments, total interest, and amortization schedule.

Compare avalanche vs snowball strategies to pay off your debts faster.

Compare ETFs by TER and see how costs impact your returns over time.

Find out how much you need to save to bridge the gap between your pension and your desired retirement income.

Calculate withholding tax on dividends for Spanish and German investors.