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About Bandwidth Calculator
Calculate data transfer time, speed and size.
Bandwidth Calculator works out download and upload times, transfer speeds and file sizes in one place. Convert between bits and bytes, plan large transfers, and keep a history of recent calculations. A fast, offline, ad-free utility.
What's new in the latest
Last updated on Jun 10, 2026
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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