Video File Size Calculator

Calculate video file size based on resolution, duration, bitrate, and modern codecs (H.264, H.265, AV1, ProRes).

Video File Size Calculator Live Calculation
Estimated Video File Size:
3.69 GB
In Megabytes (MB):3,686.4 MB
Total Bitrate:8,192 kbps
Video Size Estimate: Actual export sizes fluctuate depending on video content complexity (fast motion scenes versus static talking head scenes) and variable bitrate (VBR) encoder passes. Includes standard 192 kbps stereo audio stream.

What is the Video File Size Calculator?

Essential for videographers, YouTubers, and video editors to budget SD card space and export file sizes before rendering.

How to Use This Tool

Select your video duration, choose target resolution or preset codec bitrate, and view estimated file size across popular formats.

Formula & Calculation Logic

The mathematical formula used to calculate this conversion is:

File Size (MB) = (Total Bitrate in kbps × Duration in seconds) ÷ 8,000

Step-by-Step Example Calculation

Here is a real-world calculation example demonstrating the mathematics:

Example: A 60-minute 1080p video encoded in H.264 at 8,000 kbps (8 Mbps) + 192 kbps audio Bitrate = 8,192 kbps Seconds = 3,600 Size = (8,192 × 3,600) ÷ 8,000 = 3,686.4 MB (~3.69 GB)

Frequently Asked Questions

AV1 and H.265 (HEVC) deliver approximately 30-50% better compression efficiency than standard H.264 (AVC) at equivalent visual quality.

File size is determined strictly by bitrate and duration, not resolution. A heavily compressed 4K video at 5 Mbps is smaller than a pristine 1080p video at 20 Mbps.