How does the math calculate bitrates?

File size is a direct product of bitrate × duration. The formula simplifies this: Bitrate = (Target Size in Bits) / Duration in Seconds.

What codec presets are supported?

We provide recommended bitrate benchmarks for H.264, H.265 (HEVC), AV1, and ProRes based on standard 1080p, 4K, and 60fps formats.

Are audio bitrates factored in?

Yes, you can specify standard audio bitrates (e.g. 128kbps, 256kbps) to deduct them from the video bandwidth budget automatically.

Why is my exported file size slightly different?

Calculations provide mathematical averages (Constant Bitrate / CBR). Variable Bitrate (VBR) compression may yield slightly smaller or larger files depending on frame complexity.

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Free Video Bitrate Calculator

Calculate ideal video bitrates and file size estimates. No registration, runs 100% locally in your browser.

Video Duration

Min

Sec

Target File Size (MB)

Audio Bitrate (kbps)

Required Video Bitrate

0.00 Mbps(0 kbps)

Codec Target Guidelines

H.264 / AVCFits 720p

H.265 / HEVCFits 720p/1080p

AV1 (Modern)Highly efficient

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What is the Free Video Bitrate Calculator?

The Video Bitrate Calculator helps videographers and video editors determine the optimal encoding settings for their projects. By inputting the video duration and target file size, the tool calculates the exact bitrate required. It is vital for preparing videos for streaming, email attachments, or specific storage limits.

100% Private, Client-Side Processing

Your production parameters remain your business. The calculator operates entirely client-side using local Javascript. No project details or encoding configurations are sent to our servers. If you need to record quick video messages or screen captures securely, the Supashot Chrome Extension offers high-quality, local-first video recording.

How Video Bitrate Calculator Works

Enter your total video duration (in minutes or seconds).

Select your target target file size (e.g. 50MB for email, 500MB) or specify custom bitrates.

Get estimated target parameters to configure inside your compressor/encoder.

Why Choose Supashot?

vs. Complex Encoding Software

Offers a quick, accessible web interface to calculate bitrates before you even open your heavy video encoding applications.

vs. Generic Online Calculators

Includes specific deductions for audio streams and outputs standard codec benchmarks, all executed instantly in your local browser.

Frequently Asked Questions

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