Every CalcVortex calculator is built from verified formulas (IRS, WHO, NIST, published actuarial tables) and tested against authoritative sources. Browse all 141 free calculators by category below.
Financial Calculators
20 calculators
- Free Down Payment Calculator — Save for Your Home
- Free Auto Loan Calculator — Monthly Car Payment
- Free Credit Card Payoff Calculator — Debt-Free Date
- Free Inflation Calculator — Purchasing Power Over Time
- Free Currency Converter — Live Exchange Rates
- Free Break-Even Calculator — Find Your Break-Even Point
Health Calculators
13 calculators
Salary Calculators
61 calculators
- Free District of Columbia Salary After Tax Calculator (DC)
- Free Wyoming Salary After Tax Calculator (WY)
- Free Wisconsin Salary After Tax Calculator (WI)
- Free West Virginia Salary After Tax Calculator (WV)
- Free Washington Salary After Tax Calculator (WA)
- Free Virginia Salary After Tax Calculator (VA)
Home Calculators
8 calculators
Conversion Calculators
14 calculators
- Free Time Zone Converter — World Clock
- Free Shoe Size Converter — US, UK, EU, CM Chart
- Free Cooking Converter — US ↔ Metric Kitchen Measurements
- Free Data Storage Converter — GB, TB, MB, KB
- Free Volume Converter — Liters, Gallons, Cups
- Free Temperature Converter — Celsius, Fahrenheit, Kelvin
Date & Time Calculators Calculators
Free date calculators: age, date difference, date add/subtract, countdown timer, working days.
4 calculators
How we test every calculator
Every calculator on this site passes a three-step verification: formula sourcing from at least two authoritative references, edge-case testing (zero, boundary, large values), and cross-checking against established calculators. Read our testing process and editorial policy.