All tools
150 tools available
APR Calculator
Calculate the true annual percentage rate including fees.
House Affordability Calculator
Estimate how much house you can afford based on income and debts.
Time Card Calculator
Add up daily clock-in/out times into total hours worked for the week.
Simple Interest Calculator
Calculate simple interest and total repayment for a fixed principal and rate.
Hex Calculator
Add, subtract, multiply or divide two hexadecimal numbers.
Gravel Calculator
Estimate how many tons of gravel you need for an area.
PNG to JPG Converter
Convert PNG images to JPG with adjustable quality — free and in your browser.
Length Unit Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
Currency to Converter
Convert an amount from one currency to another using a rate you enter.
Sleep Calculator
Find the best bedtime or wake time based on 90-minute sleep cycles.
BMI Calculator
Calculate your Body Mass Index from height and weight, in metric or imperial.
Perimeter Calculator
Calculate the perimeter of a rectangle, square, circle or triangle.
Fuel Cost Calculator
Estimate the fuel cost of a trip from distance, fuel economy and fuel price.
Image to Square Converter
Crop or pad any image into a perfect square — free, in your browser, from a file or an image URL.
Markup Calculator
Calculate the selling price and profit from cost and desired markup percentage.