Online Calculators
Everyday calculators for dates, ages, discounts, tips, salaries and screen sizes that give instant answers right in your browser.
Age Calculator in Days
Find your exact age in total days, hours, minutes and seconds, plus a years-months-days breakdown, your birth weekday and next birthday countdown.
Online CalculatorsDays Between Dates Calculator
Count the days between two dates with totals in weeks, business days and a years-months-days breakdown, with an option to include the end date.
Online CalculatorsWorking Days Calculator
Count working days between two dates excluding weekends, and optionally exclude your own list of public holidays for an exact business-day figure.
Online CalculatorsAge Difference Calculator
Compare two birth dates to find the exact age gap in years, months and days plus total days, and see who is older and by how much.
Online CalculatorsDiscount Calculator
Work out sale prices after a percentage discount, see exactly how much you save, stack two discounts, or add tax back for the true final cost.
Online CalculatorsTip Calculator Online
Split a restaurant bill fairly: enter the bill, pick a tip percentage, add the number of people and see the tip, total and per-person amounts.
Online CalculatorsSalary to Hourly Calculator
Convert an annual, monthly or weekly salary into an hourly rate based on your working hours, or convert an hourly rate back into a full salary.
Online CalculatorsAspect Ratio Calculator
Simplify any width and height into an aspect ratio, calculate a missing dimension, and check common presets like 16:9, 4:3 and 9:16 with a pixel table.
Online CalculatorsRoman Numeral Converter
Convert numbers from 1 to 3999 into Roman numerals and Roman numerals back into numbers, with validation and a full symbol reference table.
Online CalculatorsNumber to Words Converter
Spell any number in English words, up to billions and including decimals, with a currency mode for cheques and invoices — copy the result in one click.
Online CalculatorsWeeks to Years Converter
Convert weeks to years instantly, in both directions. Enter weeks to see the exact value in years (plus months, days and hours), or enter years to see how many weeks that is.
Online Calculators