Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin using the exact NIST-defined formulas.

Works for any combination of the units above -- every value converts through the same verified base-unit math used on the individual pages.

How Temperature Units Relate

Celsius and Kelvin are both metric temperature scales, differing only by a fixed 273.15 offset. Fahrenheit, used mainly in the United States, has both a different zero point and a different degree size than Celsius, which is why converting between them needs a full formula rather than a single multiplication.

All Temperature Converters

Each of these has its own page with the exact formula, a reference table, and answers to common questions.

Celsius to Fahrenheit Fahrenheit to Celsius Celsius to Kelvin

Cedrick Reese

Ready Utilities was founded by Cedrick Reese, a retired veteran and web developer who enjoys building free, user-friendly online tools that simplify everyday tasks. His journey began in the early 2000s with affiliate marketing and niche site development, which grew into a passion for creating practical digital utilities and calculators. After retiring, he earned a Computer Systems Technician certificate from UEI College, completed Electro-Mechanical Technologies at Tulsa Welding School, and finished the Carpentry program at Florida State College at Jacksonville. Today, he combines his technical background and craftsmanship by building furniture using traditional woodworking methods, gardening, and developing helpful online tools for users worldwide.