Data & Storage

Data, networking and number-system calculators for developers, admins and students.

Download Time Calculator

Estimate how long a download takes from file size and connection speed. Converts Mbps to MB/s correctly (divide by 8) and shows time at half speed.

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File Size Calculator

Convert file sizes between KB, MB, GB, TB and binary KiB, MiB, GiB, TiB. See why a 1 TB drive shows about 931 GiB — decimal SI vs binary IEC prefixes.

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Storage Calculator

Estimate how many photos, songs, documents or hours of 1080p/4K video fit on a drive or memory card, using typical file sizes and usable capacity.