gigalumen to attolumen
Convert gigalumen (Glm) to attolumen (alm). Use an editable luminous flux converter, conversion formula, and reference table.
1 Glm = 1e+27 alm
Conversion formula
One gigalumen equals 1e+27 attolumen. Multiply your value in gigalumen by this factor to get attolumen. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 gigalumen:5 × 1e+27 = 5e+27 alm
Conversion table
| gigalumen (Glm) | attolumen (alm) |
|---|---|
| 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 flux measures the visible-light output weighted by human visual sensitivity.
The base reference used here is the lumen. One gigalumen is 1,000,000,000 base units; one attolumen is 1e-18 base units.
Important distinctions
Lumens measure light output; lux measures illumination per unit area.
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 Glm to alm?
Multiply the quantity in Glm 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 attolumen to gigalumen 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.
