Zetta (Z)
The SI prefix zetta (Z): a factor of 10²¹, which is one sextillion (10²¹).
What is a zetta unit?
- Symbol
- Z
- Quantity
- SI Prefixes
- Unit system
- SI
- Definition
- The SI prefix zetta (Z): a factor of 10²¹, which is one sextillion (10²¹).
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used for global data volumes in zettabytes and, with joules, for world energy: annual world energy use is roughly 0.6 zettajoules.
Zetta in other si prefixes units
- 1 Z = 1e-9 QQuetta
- 1 Z = 0.000001 RRonna
- 1 Z = 0.001 YYotta
- 1 Z = 1000 EExa
- 1 Z = 1000000 PPeta
- 1 Z = 1000000000 TTera
- 1 Z = 1000000000000 GGiga
- 1 Z = 1e+15 MMega
- 1 Z = 1e+18 kKilo
- 1 Z = 1e+19 hHecto
- 1 Z = 1e+20 daDeca
- 1 Z = 1e+22 dDeci
- 1 Z = 1e+23 cCenti
- 1 Z = 1e+24 mMilli
- 1 Z = 1e+27 µMicro
- 1 Z = 1e+30 nNano
- 1 Z = 1e+33 pPico
- 1 Z = 1e+36 fFemto
- 1 Z = 1e+39 aAtto
- 1 Z = 1e+42 zZepto
- 1 Z = 1e+45 yYocto
- 1 Z = 1e+48 rRonto
- 1 Z = 1e+51 qQuecto
- 1 Z = 1e+21 ×1Base unit (no prefix)
Zetta quick reference
| Zetta | Kilo | Milli | Quetta |
|---|---|---|---|
| 1 Z | = 1e+18 k | = 1e+24 m | = 1e-9 Q |
| 10 Z | = 1e+19 k | = 1e+25 m | = 1e-8 Q |
| 100 Z | = 1e+20 k | = 1e+26 m | = 1e-7 Q |
| 1000 Z | = 1e+21 k | = 1e+27 m | = 0.000001 Q |
Where the zetta unit fits
The next smaller si prefixes unit is the exa unit (E). 1 Z = 1000 E, and 1 E = 0.001 Z.
The next larger si prefixes unit is the yotta unit (Y). 1 Z = 0.001 Y, and 1 Y = 1000 Z.
Frequently asked questions
- How many kilo units are in one zetta unit?
- One zetta unit = 1e+18 k (kilo units).
- How many milli units are in one zetta unit?
- One zetta unit = 1e+24 m (milli units).
- How many quetta units are in one zetta unit?
- One zetta unit = 1e-9 Q (quetta units).