Encoding Calculators — Base64 Size, Encryption Overhead, Hash Collision | CalcEngine
Free encoding and cryptography calculators for developers. Calculate Base64 size overhead, encryption cost, and hash collision probability instantly.
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Base64 Size
Calculate Base64 encoded size from original bytes. See the exact output size and ~33% overhead — instant results for API payloads, images, and JWT tokens.
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Hash Collision
Calculate hash collision probability for any hash function size. Enter item count and bit width to estimate birthday problem collision risk instantly.
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Encryption Overhead
Encryption overhead calculator: measure AES-256-GCM, AES-128-GCM, AES-256-CBC, and ChaCha20 ciphertext size, overhead bytes, and encryption time in ms