Yotta (Y)
The SI prefix yotta (Y): a factor of 10²⁴, which is one septillion (10²⁴).
What is a yotta unit?
- Symbol
- Y
- Quantity
- SI Prefixes
- Unit system
- SI
- Definition
- The SI prefix yotta (Y): a factor of 10²⁴, which is one septillion (10²⁴).
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used for huge quantities: a yottameter is about 106 million light-years, and yottabytes are used when discussing future global data volumes.
Yotta in other si prefixes units
- 1 Y = 0.000001 QQuetta
- 1 Y = 0.001 RRonna
- 1 Y = 1000 ZZetta
- 1 Y = 1000000 EExa
- 1 Y = 1000000000 PPeta
- 1 Y = 1000000000000 TTera
- 1 Y = 1e+15 GGiga
- 1 Y = 1e+18 MMega
- 1 Y = 1e+21 kKilo
- 1 Y = 1e+22 hHecto
- 1 Y = 1e+23 daDeca
- 1 Y = 1e+25 dDeci
- 1 Y = 1e+26 cCenti
- 1 Y = 1e+27 mMilli
- 1 Y = 1e+30 µMicro
- 1 Y = 1e+33 nNano
- 1 Y = 1e+36 pPico
- 1 Y = 1e+39 fFemto
- 1 Y = 1e+42 aAtto
- 1 Y = 1e+45 zZepto
- 1 Y = 1e+48 yYocto
- 1 Y = 1e+51 rRonto
- 1 Y = 1e+54 qQuecto
- 1 Y = 1e+24 ×1Base unit (no prefix)
Yotta quick reference
| Yotta | Kilo | Milli | Quetta |
|---|---|---|---|
| 1 Y | = 1e+21 k | = 1e+27 m | = 0.000001 Q |
| 10 Y | = 1e+22 k | = 1e+28 m | = 0.00001 Q |
| 100 Y | = 1e+23 k | = 1e+29 m | = 0.0001 Q |
| 1000 Y | = 1e+24 k | = 1e+30 m | = 0.001 Q |
Where the yotta unit fits
The next smaller si prefixes unit is the zetta unit (Z). 1 Y = 1000 Z, and 1 Z = 0.001 Y.
The next larger si prefixes unit is the ronna unit (R). 1 Y = 0.001 R, and 1 R = 1000 Y.
Frequently asked questions
- How many kilo units are in one yotta unit?
- One yotta unit = 1e+21 k (kilo units).
- How many milli units are in one yotta unit?
- One yotta unit = 1e+27 m (milli units).
- How many quetta units are in one yotta unit?
- One yotta unit = 0.000001 Q (quetta units).