Free Online Tools & Calculators

Fast, accurate, no signup required — every calculation runs right in your browser.

Material calculators for renovation and decorating projects

Tile Calculator

Enter your area and tile size to find out exactly how many tiles — and how many boxes — to buy for your project.

Paint Calculator

Enter your wall dimensions and paint coverage to see exactly how much paint to buy, including doors, windows, and extra coats.

Flooring Calculator

Enter your room size and plank or box coverage to find out how much flooring — and how many boxes — to order.

Wallpaper Calculator

Enter your wall size, roll dimensions, and pattern repeat to see exactly how many rolls of wallpaper to buy.

Fabric Calculator

Enter your project dimensions and fabric width to work out exactly how much fabric yardage to buy.

Zakat calculators and Hijri date conversion

Zakat Calculator

Work out the zakat due on your wealth. Enter your assets and liabilities, choose a nisab basis, and the 2.5% is calculated instantly.

Zakat on Gold Calculator

Calculate the zakat owed on your gold. Enter the weight, karat, and current gold price to get the 2.5% due.

Hijri Date Converter

Convert any date between the Hijri and Gregorian calendars, in either direction.

Data format converters and generators for engineers

XML to JSON Converter

Paste XML and get clean, formatted JSON instantly — parsed with a real XML parser, not regex.

YAML to JSON Converter

Paste YAML and get clean, formatted JSON instantly — including multi-document files and anchors.

JSON to XML Converter

Paste JSON and get well-formed XML instantly — with a configurable root element and attribute convention.

UUID / GUID Generator

Generate UUID v4 identifiers — the same thing developers often call a GUID — individually or in bulk.

Slug Generator

Turn any text into a clean, lowercase, hyphenated slug — accents and Unicode handled properly.

Sitemap Validator

Paste your sitemap XML to validate it against the sitemaps.org protocol — catch broken URLs and bad values before Google does.

Grade, percentage, and attendance calculators for students

CGPA to Percentage Calculator Coming soon

Convert your CGPA to a percentage using the scale your institution actually uses.

SGPA to Percentage Calculator Coming soon

Convert your SGPA to a percentage using the scale your institution actually uses.

Marks Percentage Calculator Coming soon

Calculate your percentage from obtained marks and total marks.

Attendance Calculator Coming soon

Calculate your current attendance percentage and how many classes you still need to attend.

Document conversion tools for financial data

Bank Statement Converter Coming soon

Upload a bank statement PDF and export a clean, structured spreadsheet.

Fun and practical calculators for daily life

Dog Age Calculator Coming soon

Find your dog's age in human years, adjusted for breed size.

FLAMES Calculator Coming soon

Enter two names and play the classic FLAMES game.

ABV Calculator Coming soon

Calculate alcohol by volume from your original and final gravity readings.

⚡ Fast

Instant, live results — no page reloads, no waiting.

🆓 Free

Every tool is free to use, with no account required.

📱 Works anywhere

Fully responsive and keyboard-friendly on any device.

🔒 Private

Calculations run in your browser — your data is never uploaded.