Yottabyte (YB)

10²⁴ bytes. Yotta was the largest SI prefix until ronna and quetta were added in 2022.

1 yottabyte = 1×10²⁴ bytes (exactly).

About the yottabyte

Yotta stands for the eighth power of 1,000 and was adopted in 1991, so a yottabyte is 10^24 bytes, or 1,000 zettabytes. It stood at the top of the SI prefix list until 2022, when the BIPM added ronna (10^27) and quetta (10^30), and the byte forms, ronnabyte and quettabyte, followed. The symbol is YB.

No storage system or traffic measure approaches this size. Global IP traffic in 2016 was only around 1.2 zettabytes a year, about one-thousandth of a yottabyte, so the unit has mostly served in forecasts and illustrations rather than measurement.

The binary yobibyte (YiB) is 2^80 bytes, which is 1,208,925,819,614,629,174,706,176 bytes and about 20.9 percent more than a yottabyte. IEC standards define byte multiples up to this level, and a gap that wide is why the decimal and binary names are worth keeping apart.

Sources: Wikipedia: Byte; Wikipedia: Metric prefix; Wikipedia: Zettabyte Era

Yottabyte conversion chart

1 yottabyte expressed in every other digital storage unit:

Unit	1 yottabyte
Bytes	1×10²⁴
Kilobytes	1×10²¹
Megabytes	1×10¹⁸
Gigabytes	1×10¹⁵
Terabytes	1,000,000,000,000
Bits	8×10²⁴
Petabytes	1,000,000,000
Kibibytes	9.765625×10²⁰
Mebibytes	9.536743164×10¹⁷
Gibibytes	931,322,574,615,479
Tebibytes	909,494,701,773
Kilobits	8×10²¹
Megabits	8×10¹⁸
Gigabits	8×10¹⁵
Exabytes	1,000,000
Zettabytes	1,000
Pebibytes	888,178,419.7
Exbibytes	867,361.738
Terabits	8,000,000,000,000
Kibibits	7.8125×10²¹
Mebibits	7.629394531×10¹⁸
Gibibits	7.450580597×10¹⁵
Nibbles	2×10²⁴

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