All Free Online Calculators
Browse our complete collection of free online calculators. Every tool is fast, accurate, and requires no signup. Find the perfect calculator for your needs.
Financial Calculators
Mortgage Calculator
Calculate monthly payments with taxes, insurance, PMI
SIP Calculator
Plan systematic investment plan returns
Lumpsum Calculator
Calculate one-time investment growth
GST Calculator
Calculate GST amounts and tax breakdowns
Income Tax Calculator (US)
Estimate US federal income tax
Income Tax Calculator (India)
Calculate Indian income tax under old/new regime
Health & Fitness Calculators
Math Calculators
Date & Time Calculators
Age Calculator
Calculate exact age in years, months, and days
Date Calculator
Add or subtract days from any date
Date Difference Calculator
Find days between two dates
Birthday Calculator
Calculate days until your next birthday
Time Calculator
Add and subtract time durations
Hours Calculator
Calculate hours between times
Time Card Calculator
Track work hours and calculate pay
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Request a CalculatorLast updated: January 4, 2026