Convert numbers instantly — type a value, pick your units, and every other common unit updates live below. 100% free, runs entirely in your browser, no sign-up.
Every unit below updates live from the value you enter in the "From" field above.
Computers ultimately store everything in binary (base 2), but binary numbers get long fast, so developers use hexadecimal (base 16) and, less often today, octal (base 8) as compact shorthand — every hex digit maps cleanly to exactly 4 binary digits. This converter works on whole (integer) numbers only; decimals and negative numbers aren't supported.
Yes. It's completely free with no sign-up, and every conversion runs locally in your browser via JavaScript — the numbers you type are never sent to our servers.
Each unit uses its standard, internationally defined conversion factor, calculated in full precision and only rounded for display. Results are accurate to at least 6 significant figures.
This page intentionally covers the most commonly used numbers units rather than an exhaustive engineering list. Use the suggestion button in the bottom-right corner of any page to request a unit and we'll consider adding it.
Tell us what to improve or which tool to add next.
