Pick what to calculate, fill in the blanks, and get the answer instantly.
Everyday calculators and tools: discounts and sales tax, loan payments, percentages, dates, height charts, text, images and PDF. Free, no sign-up, and your files never leave your device.
Nine categories, nine keys
New tools are added every week.
Money
Discounts and sales tax, loan payments, profit margin6 toolsDates and time
Age, days between dates, working days12 toolsHealth
BMI, calories, due date4 toolsSchool and study
Percentages, GPA, averages3 toolsConverters
Cups to grams, inches to cm, data sizes3 toolsText tools
Word counter, case converter, lorem ipsum6 toolsGenerators
Height comparison, passwords, QR codes8 toolsImages
Compress, resize, PNG to JPG4 toolsOn a keyboard, press 1 to 9 to open a category.
We show our math
Every calculator shows the formula, a worked example and its sources, with the date we last checked it. If something changes, we update the tool and say what changed.
Your files stay on your device
Image and PDF tools run inside your browser. We never upload your files to a server or keep a copy.