Base64 Encoding Size Calculator
Calculate the file size increase after Base64 encoding.
Result
1,3333 MB
Base64 size: 1,3333 MB
Result in all units
Step-by-step solution
encoded = ⌈n/3⌉ × 4
What Is Base64 Size?
Base64 is an encoding that converts binary data into text. The encoded data grows by roughly one third compared to the original.
How is it calculated?
How Is It Calculated?
Base64 size ≈ original size × 4 ÷ 3
- Enter the file or data size.
This results in roughly a 33% increase in size.
Frequently Asked Questions
Why does Base64 increase the size?
Since every 3 bytes of data are converted into 4 characters, the encoded text is larger than the original.