Free Online Calculators
Quick, free calculators for everyday math — no sign-up, no clutter.
Age Calculator
Calculate exact age from a date of birth in years, months, and days.
Percentage Calculator
Free percentage calculator: percent of a number, increase, and decrease.
GST Calculator
Add or remove GST free using Indian slabs — 5%, 12%, 18%, and 28%.
Interest Calculator
Free simple and compound interest calculator with interest and totals.
EMI Calculator
Free home, car, and personal loan EMI calculator with full interest breakdown.
Unit Converter
Convert length, weight, and temperature — cm to inches, kg to lb, °C to °F.
Date Difference Calculator
Count the days, months, and years between two dates, leap years included.
Everyday calculators that just work
Every calculator here runs entirely in your browser and updates the moment you change an input — there is no calculate button, no sign-up, and nothing you enter is sent to a server. That matters most on the money tools: the figures you put into the EMI calculator or the GST calculator never leave your device.
For money and tax, work out loan instalments and total interest with the EMI calculator, add or remove GST at the Indian slabs, or compare savings growth with the simple and compound interest calculator. The percentage calculator covers discounts, scores, and percentage change.
For dates and measurements, the age calculator gives an exact age from a date of birth, the date difference calculator counts calendar and business days between two dates, and the unit converter handles length, weight, and temperature. Each result has its own link, so a calculation can be bookmarked or shared.