Calculators & Utilities
This section covers the everyday numbers and checks people look up most: loan repayments, mortgages, investment growth, return on investment, GST, BMI and body fat, age and time zone conversions, plus text and developer helpers such as a word counter, a JSON formatter and a UUID generator.
Calculator results are only as good as the inputs and the formula behind them. Use them to plan and compare options, then confirm anything that affects money, health or legal obligations with a qualified professional.
Finance & Calculator
View in all toolsAge Calculator
Loan EMI Calculator
Compound Interest Calculator
GPA Calculator
ROI Calculator
Tax Calculator USA
Mortgage Calculator
Investment Calculator
Crypto Profit Calculator
GST Calculator
Developer Tools
View in all toolsSEO & Marketing
View in all toolsHealth & Fitness
View in all toolsConverter Tools
View in all toolsImage & Media
View in all toolsGenerator Tools
View in all toolsCalculators & Utilities: common questions
Do the calculators send my numbers to a server?
Most do not. The calculators and text tools run in your browser, so the figures you type stay on your device. The exceptions are the AI-based Plagiarism Checker, the URL Shortener (which stores your link) and the YouTube Thumbnail Downloader (which fetches the image through our function). Each tool page says what it sends.
How accurate are the results?
Each calculator uses a standard formula, and its guide explains the method. Results are estimates, because the answer depends on the rates, rules and measurements you enter. Check important figures with your bank, accountant or doctor.
Can I use these tools on a phone?
Yes. The layouts adapt to small screens, and nothing needs to be installed. A modern browser with JavaScript turned on is enough.
Why are some tools not listed here?
Only finished tools appear in the navigation, search and this list. Tools still in progress stay out of the menus and search engines until they work properly.