Convert number systems: binary, hex, decimal
Convert whole numbers between decimal, binary, octal and hexadecimal, even very large ones. Type in any field.
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Frequently asked questions
What is hexadecimal used for?
In computing: colours like #1A9A50, memory addresses, MAC addresses and checksums are written in hexadecimal because every two characters make exactly one byte.
How large can the number be?
Practically unlimited: calculations use whole numbers without rounding, even beyond 64 bits. Decimal fractions are not converted.
Is my input sent?
No. The conversion runs in your browser.