File Size Calculator
Convert file sizes between bytes, KB, MB, GB, and TB instantly.
bytes104,857,600
KB102,400
MB100
GB0.098
TB0
About File Size Calculator
Calculate and convert file sizes between bytes, KB, MB, GB, and TB. Estimate file transfer times and storage requirements. This page is part of UtilsNest's Utility Tools, so you can move between related workflows without leaving the browser.
How to use it
- Enter or adjust the values, text, or file input needed for File Size Calculator.
- Review the generated result instantly and compare outputs until the result fits your use case.
- Copy, download, or continue to a related utility tools workflow if you need the next step.
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Open Utility ToolsFrequently Asked Questions
How long does it take to transfer a 1 GB file?
At 100 Mbps: ~80 seconds. At 1 Gbps: ~8 seconds. At USB 3.0 (5 Gbps): ~1.6 seconds.
How much storage does 1 hour of video use?
1080p H.264 video at 30fps uses roughly 4–8 GB per hour. 4K HDR can use 20–50 GB per hour.