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Storage & speed converter
Storage unit converter (KB, MB, GB, TB, KiB, MiB, GiB), Mbps to MB/s and a download time calculator based on your internet speed.
Storage units
KB, MB, GB, TB = decimal (1 GB = 1,000,000,000 bytes, as drive makers use). KiB, MiB, GiB, TiB = binary (1 GiB = 1,073,741,824 bytes, which Windows shows as "GB"). Kb/Mb/Gb = bits.
Speed: Mbps to MB/s
1 byte = 8 bits: a 100 Mbps plan means at most 12.5 MB/s of download in theory.
Download time calculator
Unit converter and download time
Convert between KB, MB, GB and TB (decimal) and KiB, MiB, GiB and TiB (binary), go from Mbps to MB/s and work out how long a download takes at your internet speed. It explains why a 1 TB drive shows up as 931 GB in Windows or how long a 50 GB game takes to download on your plan.
Frequently asked questions
Why does my 1 TB drive show 931 GB?
Manufacturers use 1 TB = 1,000,000,000,000 bytes, but Windows counts in binary (1 GiB = 1,073,741,824 bytes) and labels it “GB”. Same bytes, counted differently.
How many MB/s is 100 Mbps?
12.5 MB/s at the theoretical maximum, because 1 byte is 8 bits. In practice, due to protocol overhead and Wi-Fi, it's usually a bit less.
Why does the calculator have an efficiency option?
A real download almost never reaches 100% of the subscribed speed. 90% is a realistic estimate for wired connections; on Wi-Fi it can be lower.
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