File Size Calculator

Base64 encodes binary data into text using 64 printable ASCII characters, making it safe to transmit in text-based systems like email and URLs. It is not encryption — just encoding

The calculator uses the standard published formula for base64 calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: = padding makes output a multiple of 4 characters. Each step in the calculation is shown so you can verify the result manually.