Online calculators
Percentage, VAT, unit conversion, and other calculators.
Percent Calculator
Quickly calculate N% of a number, discounted price, markup, tax, percent change, and the difference between two numbers.
Discount Calculator
Calculate the final price after a percentage discount, the savings amount, and a clean result for promotions or listings.
VAT Calculator
Calculate amount excluding VAT, VAT amount, and total with VAT for invoices, contrquotes, and accounting.
Age Calculator
Calculate age from date of birth: full years, months, days, and the next birthday date.
Days Between Dates
Enter a start and end date to see the difference in calendar days, business days, weeks, months, and a clear interval breakdown.
Unit Converter
Convert length, weight, and temperature between common metric and imperial units.
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About this category
Quick calculations for everyday and business tasks: percentages, VAT, unit conversion, loan-style math, and specialized calculators. Results update as you type.