About CyberChef.dev
What is CyberChef Calculators?
CyberChef.dev is a broad collection of free online calculators and practical tools organized by industry and everyday use case. It covers finance, health, math, dates, construction, measurements, technology, data, text, media, and more.
Each page is built around a specific task, with focused inputs and clear results. The full catalog remains searchable in one place, whether you need to solve a formula, estimate a project, convert a value, or use a specialist technical utility.
Why Choose CyberChef.dev?
Privacy-Focused
All operations run client-side, ensuring your data never leaves your browser
Modern Interface
Clean, intuitive design optimized for productivity
Broad Practical Coverage
Calculators and tools for consumer, professional, technical, and creative tasks
Free & Open Source
No paywalls, no limits, and community-driven development
About the Team
Jack TaoFounderTechnical Reviewer
I'm a full-stack developer with over 10 years of experience in web development and software engineering. I created CyberChef.dev as an accessible home for online calculations, conversions, and practical browser tools, with each utility designed around a clear real-world task.
For calculator reviews, I check implementation, formulas, units, edge cases, and alignment with cited sources. This technical review does not represent medical, financial, tax, or legal advice.
Calculator and Tool Categories
Our tools are constantly being improved and expanded. If you have suggestions for new tools or improvements to existing ones, please visit our GitHub repository to contribute.