Financial calculators that
work.
Taxes, salary, real estate and more. Free. Right in your browser.
Most Used Calculators
Salary Calculator 2026
Calculate your net salary from gross income. With federal tax, FICA, and state taxes for 2026.
Mortgage Calculator
Calculate monthly payments, interest, and amortization for your mortgage.
Compound Interest Calculator
Calculate the compound interest effect on your savings over time.
Income Tax Calculator 2026
Calculate your income tax for the 2026 tax year.
Loan Calculator
Calculate monthly payments, total costs, and term for your loan.
ETF Savings Plan Calculator
Simulate your ETF savings plan with historical returns and costs.
All Categories
Salary & Income
6 calculators
Taxes
6 calculators
Real Estate
7 calculators
Landlord
6 calculators
Savings & Investing
7 calculators
Retirement
6 calculators
Loans & Debt
5 calculators
Benefits
7 calculators
Small Business
5 calculators
Why Summatio?
100% Private
Your data stays on your device. No server. No tracking. No account.
Current 2026
Tax rates, contributions, and allowances up to date for 2026.
Flexible
Calculate forwards and backwards. Export as PDF, Excel and more.
Bilingual
All calculators in German and English. Ideal for expats.