microlumen to femtolumen
Convert microlumen (μlm) to femtolumen (flm). Use an editable luminous flux converter, conversion formula, and reference table.
1 μlm = 1,000,000,000 flm
Conversion formula
One microlumen equals 1,000,000,000 femtolumen. Multiply your value in microlumen by this factor to get femtolumen. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 microlumen:5 × 1,000,000,000 = 5,000,000,000 flm
Conversion table
| microlumen (μlm) | femtolumen (flm) |
|---|---|
| 0.01 | 10,000,000 |
| 0.1 | 100,000,000 |
| 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 |
About these measurements
Luminous flux measures the visible-light output weighted by human visual sensitivity.
The base reference used here is the lumen. One microlumen is 0.000001 base units; one femtolumen is 1e-15 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 μlm to flm?
Multiply the quantity in μlm by 1,000,000,000. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the femtolumen to microlumen 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.
