Discount Calculator
Enter the original price, choose a currency, and set a discount from 0 to 100%. See the final price and savings.
Everyday
Open a tool, enter a value, and copy the result. Everything runs in your browser. The language menu keeps you on the same tool.
Discount Calculator
Know the price before you pay.
Date Difference Calculator
How many days between two dates?
Unit Converter
Length, mass, and temperature.
Tip & Bill Split Calculator
Add a tip and split the bill.
Age Calculator
Age on any calendar date.
Centimeters to Inches
One value. An instant conversion.
Inches to Centimeters
One value. An instant conversion.
Kilograms to Pounds
One value. An instant conversion.
Pounds to Kilograms
One value. An instant conversion.
Fahrenheit to Celsius
One value. An instant conversion.
Celsius to Fahrenheit
One value. An instant conversion.
How to use
Date Difference Calculator
Choose the start and end dates. The default is the difference; include the start date to add one day.
Unit Converter
Choose a quantity, enter a value, and select the source and target units. The result updates immediately.
Tip & Bill Split Calculator
Enter the bill, a tip from 0 to 100%, and the number of people. Total = bill + tip; each person pays total ÷ people.
Age Calculator
Enter a birth date and reference date. See completed years, remaining calendar months and days, and total elapsed days.
Centimeters to Inches
Enter the source value. Formula: in = cm ÷ 2.54. The result updates as you type.
Inches to Centimeters
Enter the source value. Formula: cm = in × 2.54. The result updates as you type.
Kilograms to Pounds
Enter the source value. Formula: lb = kg ÷ 0.45359237. The result updates as you type.
Pounds to Kilograms
Enter the source value. Formula: kg = lb × 0.45359237. The result updates as you type.
Fahrenheit to Celsius
Enter the source value. Formula: °C = (°F − 32) × 5 ÷ 9. The result updates as you type.
Celsius to Fahrenheit
Enter the source value. Formula: °F = °C × 9 ÷ 5 + 32. The result updates as you type.