Video & Audio Bitrate Calculator

Lock any two of bitrate, file size, and duration to solve the third. Includes presets for YouTube / Twitch / Netflix targets, a codec efficiency table (H.264 → H.265 → AV1), and a download-time / bandwidth panel for planning streams and uploads.

Presets

Solve

Lock the two values you know — the third becomes the answer.

Solve file size Solve bitrate Solve duration

Bitrate

Duration

File Size

Results

Answer

—

Bitrate

—

Duration

—

File size (decimal MB)

—

File size (binary MiB)

—

Download & streaming feasibility

How long the resulting file takes to transfer, and whether the bitrate fits typical upload pipes (Mbps).

Connection	Up/down speed	Transfer time	Live OK?

Same content, different codec

Rough size estimates assuming the same perceptual quality across codecs. Newer codecs (HEVC, AV1) need fewer bits for the same visual quality, but encode/decode is heavier.

Codec	Relative bitrate	Equivalent bitrate	Equivalent file size

Formulas

Core: file_size (bits) = bitrate (bps) × duration (s)

Bytes: file_size (bytes) = file_size_bits / 8

Decimal vs binary: 1 MB = 10⁶ bytes, 1 MiB = 2²⁰ bytes ≈ 1.0486 MB

Transfer: seconds = file_size_bits / link_bps