hectolux to attolux
Convert hectolux (hlx) to attolux (alx). Use an editable illuminance converter, conversion formula, and reference table.
1 hlx = 1e+20 alx
Conversion formula
One hectolux equals 1e+20 attolux. Multiply your value in hectolux by this factor to get attolux. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 hectolux:5 × 1e+20 = 5e+20 alx
Conversion table
| hectolux (hlx) | attolux (alx) |
|---|---|
| 0.01 | 1e+18 |
| 0.1 | 1e+19 |
| 1 | 1e+20 |
| 2 | 2e+20 |
| 5 | 5e+20 |
| 10 | 1e+21 |
| 25 | 2.5e+21 |
| 50 | 5e+21 |
| 100 | 1e+22 |
| 1000 | 1e+23 |
About these measurements
Illuminance is luminous flux falling on a surface per unit area.
The base reference used here is the lux. One hectolux is 100 base units; one attolux is 1e-18 base units.
Important distinctions
One lux is one lumen per square meter.
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 hlx to alx?
Multiply the quantity in hlx by 1e+20. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the attolux to hectolux 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.
