Deca (da)
The SI prefix deca (da): a factor of 10¹, which is ten (10).
What is a deca unit?
- Symbol
- da
- Quantity
- SI Prefixes
- Unit system
- SI
- Definition
- The SI prefix deca (da): a factor of 10¹, which is ten (10).
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Rarely used today. The dekagram (dag) still appears on food packaging and in recipes in parts of central Europe.
Deca in other si prefixes units
- 1 da = 1e-29 QQuetta
- 1 da = 1e-26 RRonna
- 1 da = 1e-23 YYotta
- 1 da = 1e-20 ZZetta
- 1 da = 1e-17 EExa
- 1 da = 1e-14 PPeta
- 1 da = 1e-11 TTera
- 1 da = 1e-8 GGiga
- 1 da = 0.00001 MMega
- 1 da = 0.01 kKilo
- 1 da = 0.1 hHecto
- 1 da = 100 dDeci
- 1 da = 1000 cCenti
- 1 da = 10000 mMilli
- 1 da = 10000000 µMicro
- 1 da = 10000000000 nNano
- 1 da = 10000000000000 pPico
- 1 da = 1e+16 fFemto
- 1 da = 1e+19 aAtto
- 1 da = 1e+22 zZepto
- 1 da = 1e+25 yYocto
- 1 da = 1e+28 rRonto
- 1 da = 1e+31 qQuecto
- 1 da = 10 ×1Base unit (no prefix)
Deca quick reference
| Deca | Kilo | Milli | Quetta |
|---|---|---|---|
| 1 da | = 0.01 k | = 10000 m | = 1e-29 Q |
| 10 da | = 0.1 k | = 100000 m | = 1e-28 Q |
| 100 da | = 1 k | = 1000000 m | = 1e-27 Q |
| 1000 da | = 10 k | = 10000000 m | = 1e-26 Q |
Where the deca unit fits
The next smaller si prefixes unit is the base unit (×1). 1 da = 10 ×1, and 1 ×1 = 0.1 da.
The next larger si prefixes unit is the hecto unit (h). 1 da = 0.1 h, and 1 h = 10 da.
Frequently asked questions
- How many kilo units are in one deca unit?
- One deca unit = 0.01 k (kilo units).
- How many milli units are in one deca unit?
- One deca unit = 10000 m (milli units).
- How many quetta units are in one deca unit?
- One deca unit = 1e-29 Q (quetta units).