Everyday calculators
Practical day-to-day calculators: dates, tips, fuel cost, time math and more.
Add Days to a Date Calculator
Free "add days to date" calculator — pick a start date and a number of days (positive or negative) to find the resulting date. Handles leap years.
Age Calculator
Free age calculator — type a birthdate and a reference date and get exact age in years, months and days. Defaults to today. Runs in your browser.
Aspect Ratio Calculator
Free aspect ratio calculator — get the reduced ratio of a width × height, or resize a width or height while keeping a target ratio. Works in your browser.
Days Between Dates Calculator
Free days between dates calculator — type two dates and get the exact number of calendar days between them. Works in your browser, no sign-up.
Fuel Cost Calculator
Free fuel cost calculator — work out how much a trip will cost in fuel from distance (km), consumption (km/L), and price per litre. Runs in your browser.
Time Duration Calculator
Free time duration calculator — type a start time and end time and get the hours and minutes between them. Handles times that cross midnight. Works in your browser.
Unit Price Calculator
Free unit price calculator — divide price by quantity to find the cost per unit. Lets you compare grocery deals across different sizes. Runs in your browser.