Learning centre
Calculator and Tool Guides
Practical formulas, worked examples and usage guidance for ToolSyn calculators and file tools.
How to Calculate a Percentage: Formulas and Examples
Learn how to calculate a percentage of a number, percentage increase or decrease, marks percentage and discounts with worked examples.
Read guide →How to Calculate Marks Percentage: Formula and Examples
Learn how to calculate exam percentage from obtained and total marks for one subject, multiple subjects and weighted assessments.
Read guide →EMI Calculator Pakistan: Formula, Example and Loan Guide
Understand the EMI formula, calculate monthly loan payments in PKR and learn how interest rate and tenure affect total repayment.
Read guide →Age Calculator by Date of Birth: Years, Months and Days
Learn how exact age is calculated from date of birth using calendar years, months and days, including total days and leap-year birthdays.
Read guide →Image to PDF Converter: Privacy, Quality and File Size Guide
Learn how to combine JPG, PNG and WebP images into one PDF, choose page settings and protect privacy with local browser processing.
Read guide →Uppercase, Lowercase, Title Case and Sentence Case Explained
Understand common capitalization styles and when to use each text case.
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