Category
Video Tools & Calculators
Estimate video stream file sizes based on duration, container bitrates, and audio overheads. Calculate network transfer durations accounting for transport layer protocols.
Video tools here are built around one relationship: file size ≈ bitrate × duration. From that single formula the calculators answer the three questions that come up constantly — how big will this export be, what bitrate fits my size limit, and how long will this upload take.
Most used in Video
Video File Size & Bitrate Calculator
Comprehensive video calculator: estimate file sizes from bitrates, compute bitrates for upload file size targets, and calculate transfer times.
Download & Upload Time Calculator
Calculate download and upload times for any file size — covering game downloads, video uploads, and cloud backups — with real-world protocol overhead.
Bitrate math you can verify
A 10-minute video at 8 Mbps (total) is 8,000,000 bits/s × 600 s = 4.8 × 10^9 bits = 600 MB. That is the whole calculation — the tools apply it in both directions and add audio bitrate on top when you specify a separate audio track. If YouTube recommends 12 Mbps for 1080p SDR and your target size is 700 MB, the calculator will tell you the maximum duration that fits.
Platform limits vs quality
- Platforms re-encode everything, so uploading at a higher bitrate than their target preserves quality through the transcode.
- Very low bitrates produce blockiness first in high-motion scenes; static scenes survive compression far better.
- Container overhead (MP4/MKV indexing, audio track) is usually small — a few MB per hour — but exists.
Common mistakes
- Entering video-only bitrate and forgetting audio (add ~128–256 kbps for stereo AAC).
- Confusing megabits (Mb) with megabytes (MB) when comparing against a file-size limit — a factor of 8.
- Assuming upload time uses your connection’s download speed; uploads are typically 5–20× slower on consumer lines.