gigacandela to attocandela
Convert gigacandela (Gcd) to attocandela (acd). Use an editable luminous intensity converter, conversion formula, and reference table.
1 Gcd = 1e+27 acd
Conversion formula
One gigacandela equals 1e+27 attocandela. Multiply your value in gigacandela by this factor to get attocandela. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 gigacandela:5 × 1e+27 = 5e+27 acd
Conversion table
| gigacandela (Gcd) | attocandela (acd) |
|---|---|
| 0.01 | 1e+25 |
| 0.1 | 1e+26 |
| 1 | 1e+27 |
| 2 | 2e+27 |
| 5 | 5e+27 |
| 10 | 1e+28 |
| 25 | 2.5e+28 |
| 50 | 5e+28 |
| 100 | 1e+29 |
| 1000 | 1e+30 |
About these measurements
Luminous intensity is visible-light output per unit solid angle in a direction.
The base reference used here is the candela. One gigacandela is 1,000,000,000 base units; one attocandela is 1e-18 base units.
Important distinctions
Candela is a directional quantity and cannot be converted directly to lumens without geometry.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert Gcd to acd?
Multiply the quantity in Gcd by 1e+27. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the attocandela to gigacandela converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
