About Us

Kolay Hesaplasana is a free online calculator platform designed to help individuals, students and professionals worldwide perform everyday calculations quickly, accurately and for free — with no sign-up required.

Our Mission

Complex spreadsheets or paid consultants should not be necessary for everyday calculations. Kolay Hesaplasana aims to put all these calculations in a simple, accessible interface that works entirely in your browser.

Our core principles:

  • All tools are completely free — no membership, no subscription
  • Calculations run in your browser — your data is never sent to a server
  • Formulas follow internationally recognised standards (WHO, scientific consensus)
  • No sign-up required — instant results

Our Tools

Kolay Hesaplasana currently offers 0 tools across multiple categories, with a growing English-language selection covering:

Health

BMI, ideal weight, BMR & daily calories, body fat, pregnancy and sleep calculators

Math

Percentage, average, area, volume, GCD/LCM, factorial, combinations, unit converter

Finance

Discount, profit margin, markup, ROI, loan payments, currency conversion

Date & Time

Age calculator, date difference, time zone tools, countdown timer

Web Tools

QR code generator, password generator, character/word counter, hash generator

Other

Random number picker, Roman numeral converter, Caesar cipher and more

Browse all English tools on the homepage →

Data Accuracy

Health and scientific calculators on Kolay Hesaplasana are based on internationally recognised standards:

  • WHO — BMI categories and growth standards
  • NIST — Password security guidelines
  • Published peer-reviewed formulas — Mifflin-St Jeor, Hamwi, Devine and other clinical formulas

Tools are updated whenever the underlying standards change. For critical medical or financial decisions, please consult a qualified professional.

Technology

Kolay Hesaplasana is built to put user experience and privacy first:

  • All calculations run in JavaScript in your browser
  • Encrypted connection via HTTPS (Cloudflare CDN)
  • Fully responsive — works on phone, tablet and desktop
  • PWA support — can be added to your home screen
  • Performance-optimised — GZIP, caching, minified CSS/JS

Privacy Commitment

No calculation data you enter (health figures, financial numbers etc.) is ever sent to our servers or stored. See our Privacy Policy for details.

Developer

Kolay Hesaplasana is developed by Tan Dijital.