Picocandelas to zeptocandelas converter
Convert picocandelas (pcd) to zeptocandelas (zcd). Calculate any value, follow the unit-factor steps and check a conversion table.
Updated · How we checkUse a decimal point, such as 2.5. Enter a value in pcd; the result is in zcd.
Formula
Worked example
Convert 1 pcd to zcd:
1 pcd ≈ 1,000,000,000 zcd
Multiply your pcd value by the factor above. The calculator uses the full conversion factor before rounding the displayed answer.
Picocandelas to zeptocandelas table
Reference values rounded to 10 significant digits. Use the converter above for other amounts.
| Picocandelas (pcd) | Zeptocandelas (zcd) |
|---|---|
| 0.1 | ≈ 100,000,000 |
| 0.5 | ≈ 500,000,000 |
| 1 | ≈ 1,000,000,000 |
| 2 | ≈ 2,000,000,000 |
| 5 | ≈ 5,000,000,000 |
| 10 | ≈ 10,000,000,000 |
| 25 | ≈ 25,000,000,000 |
| 50 | ≈ 50,000,000,000 |
| 100 | ≈ 100,000,000,000 |
| 1000 | ≈ 1e+12 |
What picocandelas measure
Picocandelas (pcd) represent luminous intensity. One unit equals 10^-12 cd. The candela is the SI base unit of luminous intensity in a specified direction.
Reading the result in zeptocandelas
Zeptocandelas (zcd) represent luminous intensity. One unit equals 10^-21 cd. The candela is the SI base unit of luminous intensity in a specified direction.
Where this conversion helps
Normalize directional light intensity specifications before comparing their stated values. Candelas, lumens and lux describe different quantities. Beam geometry or area is needed to relate them.
How the scale changes
The input unit has a factor of 1e-12 cd; the output unit has a factor of 1e-21 cd. Multiply the entered number by the input factor, then divide by the output factor. The physical quantity stays the same while its numerical representation changes.
Reading very small or large results
Scientific notation keeps very small and large values readable: 2.5e-6 means 0.0000025. The converter calculates with 50 significant digits internally and displays up to 10. Exact unit definitions do not remove uncertainty from the original measurement.
References
Definitions and method references. Example rates and prices on this page are editable assumptions.