Free Finance Calculators

Free online finance calculators for tips, compound interest, rent affordability, freelancer taxes, and rent vs buy analysis. No signup required.

Tip Calculator

Calculate tip amount, total with tip, and split the bill between friends.

Calculate compound interest with regular contributions. See year-by-year growth projections.

Find how much rent you can afford using the 30% rule, 50/30/20 rule, and debt-adjusted method.

Estimate quarterly tax payments for self-employment income including SE tax and federal income tax.

Compare the long-term cost of renting versus buying a home with year-by-year analysis.