Video Bitrate Calculator - File Size & Bandwidth Estimation Free

How to Use the Video Bitrate Calculator

1. Select resolution — choose from standard resolutions including SD (480p), HD (720p), Full HD (1080p), QHD (1440p), 4K UHD (2160p), and 8K UHD (4320p). Each preset configures the base pixel count for bitrate estimation.
2. Enter frame rate — set your video’s frame rate from 1 to 120 FPS. Common values are 24 (cinematic), 30 (standard video), and 60 (smooth motion). Higher frame rates require proportionally higher bitrates.
3. Choose codec — select your compression codec: H.264 (widest compatibility), H.265/HEVC (better compression), H.265+ (variable bitrate optimization), VP9 (open standard), or AV1 (best compression, modern).
4. Select bit depth — choose 8-bit (standard) or 10-bit (HDR content, better color). 10-bit adds approximately 25% to the bitrate requirement.
5. Read results — view the estimated bitrate in Mbps and file sizes for various durations: per minute, per hour, per day, and a custom duration you specify. Compare across codecs to see storage savings.

Features

• Multi-codec support — H.264, H.265/HEVC, H.265+, VP9, and AV1 with realistic compression ratios
• Multi-resolution — SD (480p) through 8K UHD (4320p) with recommended bitrate ranges
• Bit depth aware — accounts for the ~25% bitrate increase needed for 10-bit HDR content
• File size estimates — instant calculations per minute, hour, day, and custom duration
• Compression comparison — see side-by-side storage requirements across different codecs
• Custom duration — calculate file size for any specific video length
• Bandwidth estimation — understand the network bandwidth required to stream your video at the selected settings

Use Cases

• Video production — estimate storage requirements for raw footage and final exports before starting a shoot
• Streaming setup — determine the optimal bitrate for live streaming on YouTube, Twitch, or your own platform based on available upload bandwidth
• Security systems — calculate how much storage a multi-camera NVR system needs for 7, 15, or 30 days of continuous recording
• Content delivery — plan CDN costs by estimating per-stream bandwidth consumption at different quality levels
• Codec migration — compare storage savings when migrating from H.264 to H.265 or AV1 to justify infrastructure changes

FAQ

What bitrate should I use for 4K video?

For 4K (2160p) at 30 FPS: H.264 typically needs 35-45 Mbps, H.265 needs 20-30 Mbps, and AV1 needs 12-20 Mbps for similar quality. The calculator provides precise estimates based on your specific settings.

Why does AV1 use lower bitrates than H.264?

AV1 is a newer, more efficient codec that achieves 30-50% better compression than H.264 at the same visual quality. This means smaller file sizes and lower bandwidth requirements, but requires more processing power to encode and decode.

Does higher bitrate always mean better quality?

Up to a point, yes — but each resolution and codec has a “transparency bitrate” beyond which quality gains are imperceptible. The calculator uses recommended bitrate ranges optimized for the balance between quality and file size.

What’s the difference between CBR and VBR?

This calculator estimates average bitrate. Constant Bitrate (CBR) maintains the same bitrate throughout, useful for streaming. Variable Bitrate (VBR) allocates more data to complex scenes and less to simple ones, resulting in better quality-to-size ratios for stored video.

Tips

• For surveillance video, calculate at lower bitrates (15-30% below standard) — security footage doesn’t need the same quality as cinematic content, and the storage savings add up fast
• When calculating storage for a video project, add 20% buffer for audio tracks, metadata, and container overhead
• For YouTube uploads, the platform re-encodes your video anyway — use the highest reasonable bitrate; YouTube’s own recommended bitrates are intentionally lower than source quality