CalculatorPK is a collection of free online calculators and everyday tools that are quick to use and easy to understand.
What we do
We build simple tools for questions people ask every day: how much GST is on this bill, what will my loan EMI be, how old am I exactly, what is my BMI. Each tool comes with the formula, a worked example and answers to common questions, so you can check the result for yourself.
How we work
- Free: every tool is free to use, with no sign-up.
- Private: calculations happen in your browser. The one exception is the URL Shortener, which sends your link to TinyURL, and we say so on that page.
- Careful: we use standard formulas and check our examples. When rules change, such as the GST slab changes of 22 September 2025, we update the tools.
- Honest about limits: our tools are for general guidance. They are not professional financial, tax, legal or medical advice.
Our tools
- Percentage Calculator: Find percentages, percentage change, and add or subtract a percent.
- GST Calculator: Add or remove GST using the current Indian GST rates.
- EMI Calculator: Monthly loan EMI, total interest and a full repayment schedule.
- Profit & Loss Calculator: Profit or loss with markup and margin percentages.
- Age Calculator: Exact age in years, months and days, plus your next birthday.
- BMI Calculator: Body Mass Index in metric or imperial units with a healthy weight range.
- Area Calculator: Area of a square, rectangle, circle or triangle in any unit.
- Unit Converter: Convert length, weight, temperature, area, volume and speed, including guntha, acre and tola.
- Average Calculator: Mean, median, mode, range and standard deviation of any list of numbers.
- URL Shortener: Turn a long link into a short one using TinyURL.
- QR Code Generator: Create QR codes for links, text, WhatsApp and social profiles.
- Image Color Picker: Click any pixel of an image to get its HEX, RGB and HSL codes.
- Image Pixel Checker: Check image dimensions, megapixels, file size and print size.
- Headcanon Generator: Random headcanon ideas for characters and stories.
- Spin the Wheel: A random name picker wheel for classrooms, giveaways and quick decisions.
- Fancy Text Generator: Turn plain text into bold, script, gothic and other styles you can copy.
Why we built it
Many calculator sites are slow, crowded with pop-ups, or give a number with no explanation. We wanted tools that load quickly on a phone, show their working, and explain what the result means, so that you can trust it and learn from it.
How we check accuracy
Every calculator is tested with worked examples whose answers we can verify by hand, and the same examples are printed on the page. Edge cases, such as a zero value, a leap-year birthday or a very long loan tenure, are tested too. When a rule or rate changes, we update the tool and the page text together.
Advertising
The tools are free to use. To cover running costs we may show advertisements on the site. Ads never change the results the tools give. See our Privacy Policy for details about cookies and advertising.
Get in touch
Found a mistake or have an idea for a new tool? Please contact us.