Ronto (r)
The SI prefix ronto (r): a factor of 10⁻²⁷, which is one octillionth (10⁻²⁷).
What is a ronto unit?
- Symbol
- r
- Quantity
- SI Prefixes
- Unit system
- SI
- Definition
- The SI prefix ronto (r): a factor of 10⁻²⁷, which is one octillionth (10⁻²⁷).
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Added to the SI in 2022. The mass of an electron is about 0.91 rontograms (9.1 × 10⁻²⁸ g).
Ronto in other si prefixes units
- 1 r = 1e-57 QQuetta
- 1 r = 1e-54 RRonna
- 1 r = 1e-51 YYotta
- 1 r = 1e-48 ZZetta
- 1 r = 1e-45 EExa
- 1 r = 1e-42 PPeta
- 1 r = 1e-39 TTera
- 1 r = 1e-36 GGiga
- 1 r = 1e-33 MMega
- 1 r = 1e-30 kKilo
- 1 r = 1e-29 hHecto
- 1 r = 1e-28 daDeca
- 1 r = 1e-26 dDeci
- 1 r = 1e-25 cCenti
- 1 r = 1e-24 mMilli
- 1 r = 1e-21 µMicro
- 1 r = 1e-18 nNano
- 1 r = 1e-15 pPico
- 1 r = 1e-12 fFemto
- 1 r = 1e-9 aAtto
- 1 r = 0.000001 zZepto
- 1 r = 0.001 yYocto
- 1 r = 1000 qQuecto
- 1 r = 1e-27 ×1Base unit (no prefix)
Ronto quick reference
| Ronto | Kilo | Milli | Quetta |
|---|---|---|---|
| 1 r | = 1e-30 k | = 1e-24 m | = 1e-57 Q |
| 10 r | = 1e-29 k | = 1e-23 m | = 1e-56 Q |
| 100 r | = 1e-28 k | = 1e-22 m | = 1e-55 Q |
| 1000 r | = 1e-27 k | = 1e-21 m | = 1e-54 Q |
Where the ronto unit fits
The next smaller si prefixes unit is the quecto unit (q). 1 r = 1000 q, and 1 q = 0.001 r.
The next larger si prefixes unit is the yocto unit (y). 1 r = 0.001 y, and 1 y = 1000 r.
Frequently asked questions
- How many kilo units are in one ronto unit?
- One ronto unit = 1e-30 k (kilo units).
- How many milli units are in one ronto unit?
- One ronto unit = 1e-24 m (milli units).
- How many quetta units are in one ronto unit?
- One ronto unit = 1e-57 Q (quetta units).