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Video File Size Calculator

Estimate video export file size in MB or GB from bitrate and duration.

Aspect Ratio & Resolution Scaler

Exact Aspect Ratio
16:9
Megapixels
2.07 MP
Height: 720 px

Video File Size & Storage Estimator

Estimated Uncompressed Export Size:
6.59 GB
At 15 Mbps bitrate (1875 KB/s throughput)
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Calculation Guide & Reference

Video File Size Estimation Mathematics

Video file size calculator estimates export file size in MB or GB from bitrate and duration.

Standardized Mathematical Formula
File Size (MB) = (Bitrate (Mbps) × Duration (seconds)) ÷ 8

Bitrate measures data per second in megabits; dividing by 8 converts megabits to megabytes (since 1 byte = 8 bits). Multiplying by the total duration in seconds gives the total file size.

Variables:
Bitrate:Data rate in megabits per second (Mbps)
Duration:Video length, in minutes
How It Works (Step-by-Step)
  • 1Enter the target bitrate (Mbps) and video duration (minutes).
  • 2View the estimated file size in MB or GB.
Real-World Numerical Example
15 Mbps for 60 Minutes

A video is exported at 15 Mbps bitrate and runs for 60 minutes.

•Duration in seconds: 60 × 60 = 3,600 seconds.
•File size: (15 × 3,600) ÷ 8 = 54,000 ÷ 8 = 6,750 MB.
•6,750 MB ÷ 1,024 ≈ 6.59 GB.
Result: The 60-minute video at 15 Mbps produces a file approximately 6.59 GB in size.

Frequently Asked Questions (FAQ)

A common recommendation is 8-12 Mbps for standard 1080p at 30fps, and 16-24 Mbps for 1080p at 60fps — higher bitrates preserve more detail at the cost of larger file sizes.

This estimates video-only data at a constant bitrate; real exports also include audio tracks and often use variable bitrate encoding, both of which shift the final size somewhat from this estimate.

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