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Attocandela (acd) Unit Definition
The attocandela is a multiple of the unit candela (cd) for luminous intensity. The International System of Units (SI) defines the prefix atto (a) as a factor of 10-18 or 0.000000000000000001. Per this definition, one attocandela is 10-18 candelas. The attocandela is represented by the symbol acd.
SI Multiples
A table of various luminous intensity candela units derived from SI multiples:
Submultiples |
Multiples |
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Scientific Notation |
Value |
Prefix |
Name |
Scientific Notation |
Value |
Prefix |
Name |
10-1 cd |
0.1 cd |
Deci (d) | Decicandela (dcd) | 101 cd |
10 cd |
Deca (da) | Decacandela (dacd) |
10-2 cd |
0.01 cd |
Centi (c) | Centicandela (ccd) | 102 cd |
100 cd |
Hecto (h) | Hectocandela (hcd) |
10-3 cd |
0.001 cd |
Milli (m) | Millicandela (mcd) | 103 cd |
1000 cd |
Kilo (k) | Kilocandela (kcd) |
10-6 cd |
0.000001 cd |
Micro (µ) | Microcandela (µcd) | 106 cd |
1000000 cd |
Mega (M) | Megacandela (Mcd) |
10-9 cd |
0.000000001 cd |
Nano (n) | Nanocandela (ncd) | 109 cd |
1000000000 cd |
Giga (G) | Gigacandela (Gcd) |
10-12 cd |
0.000000000001 cd |
Pico (p) | Picocandela (pcd) | 1012 cd |
1000000000000 cd |
Tera (T) | Teracandela (Tcd) |
10-15 cd |
0.000000000000001 cd |
Femto (f) | Femtocandela (fcd) | 1015 cd |
1000000000000000 cd |
Peta (P) | Petacandela (Pcd) |
10-18 cd |
0.000000000000000001 cd |
Atto (a) | Attocandela (acd) | 1018 cd |
1000000000000000000 cd |
Exa (E) | Exacandela (Ecd) |
10-21 cd |
0.000000000000000000001 cd |
Zepto (z) | Zeptocandela (zcd) | 1021 cd |
1000000000000000000000 cd |
Zetta (Z) | Zettacandela (Zcd) |
10-24 cd |
0.000000000000000000000001 cd |
Yocto (y) | Yoctocandela (ycd) | 1024 cd |
1000000000000000000000000 cd |
Yotta (Y) | Yottacandela (Ycd) |
10-27 cd |
0.000000000000000000000000001 cd |
Ronto (r) | Rontocandela (rcd) | 1027 cd |
1000000000000000000000000000 cd |
Ronna (R) | Ronnacandela (Rcd) |
10-30 cd |
0.000000000000000000000000000001 cd |
Quecto (q) | Quectocandela (qcd) | 1030 cd |
1000000000000000000000000000000 cd |
Quetta (Q) | Quettacandela (Qcd) |
Other Luminous Intensity Unit Definitions
- Attocandela (acd)
Bougie Decimal (B)
- Candela (cd)
Candle Germany (candle)
Candle International (candle)
Candle New (candle)
Candlepower (cp)
Candlepower Old (cp)
Carcel Unit (carcel-unit)
- Centicandela (ccd)
- Decacandela (dacd)
- Decicandela (dcd)
Decimal Candle (dc)
- Dekacandela (dacd)
- Exacandela (Ecd)
- Femtocandela (fcd)
- Gigacandela (Gcd)
- Hectocandela (hcd)
Hefner Unit (HK)
- Kilocandela (kcd)
Lumen Per Steradian (lm/sr)
- Megacandela (Mcd)
- Microcandela (μcd)
- Millicandela (mcd)
- Nanocandela (ncd)
Pentane Candle (pc)
- Petacandela (Pcd)
- Picocandela (pcd)
- Quectocandela (qcd)
- Quettacandela (Qcd)
- Ronnacandela (Rcd)
- Rontocandela (rcd)
- Teracandela (Tcd)
Violle (violle)
- Yoctocandela (ycd)
- Yottacandela (Ycd)
- Zeptocandela (zcd)
- Zettacandela (Zcd)
Convert to Another Luminous Intensity Unit
Related Definitions
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Sources
“Candela.” Wikipedia, Wikimedia Foundation, 4 Sept. 2023, en.wikipedia.org/wiki/Candela.