File Size Reference Table
| Format | Efficiency | Compression Ratio |
|---|---|---|
| H.264 (MP4) | Standard | ~50:1 |
| VP9 (WEBM) | High | ~65:1 (30% smaller than H.264) |
| ProRes (MOV) | Low | ~3:1 (near-lossless quality) |
| H.265/HEVC | Very High | ~75:1 (50% smaller than H.264) |
File Size Estimation Formula
# Simplified formula used by this calculator file_size_MB = (bitrate_kbps / 8) × duration_seconds / 1024 # Where bitrate varies by resolution and quality: 720p → base ~3,500 kbps at medium quality 1080p → base ~6,000 kbps at medium quality 1440p → base ~12,000 kbps at medium quality 4K → base ~25,000 kbps at medium quality
- Calculate optimal bitrate: Bitrate Calculator
- Pick the right codec: Codec Comparison Guide
- Stream settings: OBS Settings Calculator
- Pick the right dimensions: Aspect Ratio & Resolution Calculator
- Need video titles? YouTube Title Generator
- Need YouTube keywords? YouTube Tags Generator
- Write your description: Description Generator with timestamps & hashtags
- Compress your video: YouTube Video Compressor
- Check your SEO score: YouTube SEO Checker
Need to calculate the right bitrate for your target file size? Use Trimpx Bitrate Calculator in reverse — input your desired file size and it tells you what bitrate to use.