Popular
Tile Calculator
Enter your area and tile size to find out exactly how many tiles — and how many boxes — to buy for your project.
15 free tools · no sign-up neededUseful tools for everyday
Useful tools for everyday
questions and decisions.
Find calculators, converters and generators for home projects, money, study, development and daily life — then get a clear answer in seconds.
15 tools live nowMore added regularly
Instant resultsNo waiting or setup
Mobile readyDesigned for small screens
Private by designMost work in your browser
Browse by category
Start with a subject, then choose the exact calculator or converter.
↗Home Improvement5 toolsTile CalculatorPaint CalculatorFlooring Calculator↗Islamic Finance & Calendar3 toolsZakat CalculatorZakat on Gold CalculatorHijri Date Converter↗Developer Tools6 toolsXML to JSON ConverterYAML to JSON ConverterJSON to XML Converter↗Academic Tools4 toolsCGPA to Percentage CalculatorSGPA to Percentage CalculatorMarks Percentage Calculator↗Finance & Documents1 toolBank Statement Converter↗Everyday & Lifestyle3 toolsDog Age CalculatorFLAMES CalculatorABV Calculator
Good places to start
Popular with new visitorsMost popular tools
The calculators and converters visitors open most often.
Popular
Paint Calculator
Enter your wall dimensions and paint coverage to see exactly how much paint to buy, including doors, windows, and extra coats.
Popular
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.
Popular
Hijri Date Converter
Convert any date between the Hijri and Gregorian calendars, in either direction.
Popular
XML to JSON Converter
Paste XML and get clean, formatted JSON instantly — parsed with a real XML parser, not regex.
Popular
UUID / GUID Generator
Generate UUID v4 identifiers — the same thing developers often call a GUID — individually or in bulk.
Popular
CGPA to Percentage Calculator
Enter your CGPA or GPA, choose your school's conversion method, and get an instant percentage — no manual math required.
Featured this week
A practical calculator worth trying, plus a few quick favourites.
Plan your tiles before you shop.
Estimate room area, tile quantity, boxes and waste allowance with one simple calculator.
Example estimate44 tiles9 boxes · includes 10% waste
Zakat CalculatorWork out the zakat due on your wealth. Enter your assets and liabilities, choose a nisab basis, and the 2.5% is calculated instantly.→XML to JSON ConverterPaste XML and get clean, formatted JSON instantly — parsed with a real XML parser, not regex.→Hijri Date ConverterConvert any date between the Hijri and Gregorian calendars, in either direction.→
Explore by what you want to do
Task-based shortcuts make it easier to find the right starting point.
Plan a home project
Measure rooms, estimate materials and prepare renovation costs.
Make a money decision
Convert bank statement PDFs into clean spreadsheets.
Check study progress
Convert grades, monitor attendance and plan academic targets.
Transform developer data
Convert formats, generate identifiers and validate technical files.
Purpose-built toolsClear inputs and useful results
Private by designMost tools run in your browser
Fast to useNo setup or account required
Easy to understandSimple explanations and examples
Guides, formulas and explanations
Use the answer quickly, then understand how it was calculated.
Guide
How to calculate zakat
Understand eligible assets, liabilities and the 2.5% rate.
GuideHow many tiles do I need?
The waste-allowance formula and box-rounding logic explained.
CompareXML vs JSON: the @_ convention
How attributes and repeated elements map between formats.
GuideUUID v4 vs v7: what changes?
Random vs time-ordered identifiers, and when each one wins.