เกี่ยวกับเรา - DiffCalc

Our Mission

DiffCalc was built with a simple but important mission: to provide fast, accurate, and completely free calculation tools that are accessible to everyone, regardless of their language or location. We believe that useful everyday tools should be available without barriers, without sign-ups, without fees, and without restrictions.

What We Offer

DiffCalc provides a comprehensive suite of free online tools designed to help with everyday calculations:

  • Date Difference Calculator: Count the exact number of days, weeks, months, and years between any two dates using either the Gregorian or Hijri calendar.
  • Age Calculator: Calculate your precise age broken down into years, months, days, hours, and even minutes from any date of birth.
  • Hijri-Gregorian Date Converter: Instantly convert dates between the Islamic Hijri calendar and the Gregorian calendar with high accuracy.
  • Unit Converters: Convert between hundreds of units across five categories including length, weight, area, volume, and temperature with precision.
  • Percentage and Marks Calculator: Quickly compute percentages, grade calculations, and score conversions for academic and professional use.

Why Choose DiffCalc?

Unlike many calculator websites, DiffCalc was designed and built from the ground up with full multilingual support. All of our tools work seamlessly in 22 languages including Arabic, English, French, German, Spanish, Hindi, Japanese, Korean, and many more. Every interface element, every result label, and every description is properly localized by human translators, not generated by machine translation.

Our Technology

DiffCalc is a modern, high-performance static website built for speed and reliability. All calculations are performed instantly in your browser, which means no data is ever sent to any external server. Pages load extremely fast, work offline after your first visit, and fully respect your privacy at all times.

Always Free, Always Accessible

DiffCalc is completely free to use and will always remain so. We sustain the project through minimal, non-intrusive advertising. We never sell user data, we never require account registration, and we never limit access to any of our tools. Our goal is to make high-quality calculation tools available to everyone around the world.

Get in Touch

Have a suggestion for a new tool? Found a bug or calculation error? Want to request support for an additional language? We would love to hear from you. Please reach out to us at contact@diffcalc.com and our team will respond as soon as possible.