Investment Calculators
Project growth, measure returns and test what history says about the market.
Financial Tools & Calculators
56 free calculators for your pay, taxes, home, debt, savings, investments and business. Each one shows its formula, a worked example and its sources.
Most used
Choose a category
All 9 investing calculators →
Business Calculators
Price products, read your margins and see when the business breaks even.
Salary & Income Calculators
Turn pay into take-home pay, compare hourly and salary, and check a raise.
Wealth & Savings Calculators
Build a budget, set a savings goal and see when you could retire.
Tax Calculators
Estimate federal tax, refunds and self-employment tax with current IRS figures.
Loan & Mortgage Calculators
Price a loan, plan a payoff and see the full amortization schedule.
Not sure where to start?
- What will my paycheck be after taxes?Paycheck
- What is my monthly mortgage payment?Mortgage
- How much house can I afford?How much house
- How much federal tax will I owe?Federal income tax
- What is my hourly wage as a salary?Hourly ↔ salary
- How much will my savings grow?Compound interest
- Am I saving enough to retire?Retirement savings
- When will I be debt-free?Debt payoff plan
- What price gives me a 40% margin?Profit margin
- How much do I owe as a freelancer?Self-employment tax
How we build these calculators
- Current, dated figures. Tax brackets, deductions and payroll limits come from the IRS and the Social Security Administration, for the 2026 and 2027 tax years.
- The math on the page. Every calculator shows its formula, a worked example and its assumptions, so you can check the result yourself.
- Private and free. No sign-up, no phone number, no lender offers in your results. Calculations run in your browser.
- Tested, and honest about limits. Each calculator is checked by automated tests against reference math written separately. Results are estimates for education, not financial, tax or legal advice.
