Video File Size Calculator
Estimate how much storage a video will take based on duration, resolution, and quality settings.
Calculate Video File Size
Estimate storage needs for your video
Common Video Sizes
1 Hour Videos
10 Minute Videos
About This Calculator
This calculator estimates file size based on typical H.264 bitrates. Actual file sizes vary depending on:
- Video codec (H.265 is ~50% more efficient than H.264)
- Content complexity (detailed scenes = larger files)
- Frame rate (60fps vs 30fps affects size)
- Audio codec and quality (AAC, Opus, etc.)
Frequently Asked Questions
How is video file size calculated?
Video file size = (Video Bitrate + Audio Bitrate) × Duration. Bitrate is measured in Mbps (megabits per second), and duration in seconds. The result is converted to MB or GB.
How much space does a 1 hour 1080p video take?
A 1-hour 1080p video at standard bitrate (8 Mbps) takes about 3.6 GB. At high quality (12 Mbps), it's around 5.4 GB. 4K videos are 3-4x larger.
What affects video file size the most?
Bitrate and duration. Higher bitrate = better quality but larger files. Resolution (1080p, 4K) affects bitrate requirements. The codec also matters — H.265/HEVC is 50% more efficient than H.264.
How can I reduce video file size?
Lower the bitrate (reduces quality slightly), use a more efficient codec (H.265 instead of H.264), or reduce resolution. MediaOptim can compress videos by 40-70% without visible quality loss.
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