Standard Calculator
Everyday arithmetic with memory functions — add, subtract, multiply, divide
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💡 Press % after a number to convert it — e.g. 200 + 15% = 230
Scientific Calculator
Trigonometry, logarithms, exponents, square roots, and constants π and e
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Mortgage Calculator
Estimate your monthly mortgage payment — principal, interest, tax, and insurance
Mortgage Breakdown
Monthly Principal & Interest—
Property Tax / mo—
Insurance / mo—
Total Monthly Payment—
Total Interest Paid—
Total Cost of Loan—
💡 A 20% down payment removes PMI, typically saving $100–$200/month.
401k Retirement Calculator
Project your retirement nest egg with contributions, employer match, and compound investment growth
% of your contribution
Retirement Projection
Years Until Retirement—
Your Contributions—
Employer Match Total—
Investment Growth—
Projected Balance at Retirement—
Est. Monthly Income (4% rule)—
💡 Always contribute enough to capture 100% of your employer match — it's an instant 50–100% return on that money.
Investment Calculator
Calculate compound interest growth on lump sums and regular contributions over time
Investment Projection
Initial Investment—
Total Contributions—
Interest Earned—
Final Balance (Nominal)—
Inflation-Adjusted Value—
Effective Annual Rate (EAR)—
💡 Adding just $100/month more to your investment can add tens of thousands to your final balance through compounding.
Salary & Paycheck Calculator
Estimate your federal & state taxes, FICA deductions, and actual take-home pay per paycheck
Per Paycheck Breakdown
Per Paycheck
Annually
Gross Income——
Pre-Tax Deductions——
Federal Taxable Income——
Federal Income Tax——
State Income Tax——
Social Security (6.2%)——
Medicare (1.45%)——
Post-Tax Deductions——
Extra Withholding——
Tax Credits——
💵 Net Take-Home Pay——
Effective Tax Rate——
💡 This calculator uses 2024 federal tax brackets. State tax rates are simplified flat approximations — actual rates are graduated and vary. Always verify with your payroll department or a tax professional.
Percentage Calculator
Three essential percentage formulas — instant results, no guesswork
① What is X% of Y?
Result—
② X is what % of Y?
Percentage—
③ Percentage Change
Change—
BMI Calculator
Calculate your Body Mass Index in US or metric units and find your healthy weight range
Your BMI—
Category—
Healthy Weight Range—
💡 BMI is a screening tool — not a diagnostic measure. Always discuss results with a healthcare provider.
Tip Calculator
Split the bill and calculate tip per person — no math at the table
Split Summary
Subtotal$0.00
Tip Amount$0.00
Total Bill$0.00
Per Person$0.00
💡 15% = good, 18% = great, 20%+ = excellent service.
Age Calculator
Find your exact age in years, months, and days — plus your next birthday countdown
Exact Age—
Total Months—
Total Days Lived—
Next Birthday—
Currency Converter
Convert between 10 major world currencies using reference exchange rates
Converted Amount—
Exchange Rate—
Inverse Rate—
⚠️ Rates are reference values. For live rates use your bank or a financial service.