Foot-lamberts to Lamberts Converter
Enter the luminance in foot-lamberts below to convert it to lamberts.
Convert Foot-lamberts to Lamberts
Enter a value in foot-lamberts (fL) to convert to lamberts (L).
Foot-lambert to Lambert Conversion Table
Table showing various foot-lambert measurements converted to lamberts. Click any preset value or arrow to load it into the converter.
| Foot-lamberts (fL) | Lamberts (L) |
|---|---|
| 1 fL | 0.0010764 L |
| 2 fL | 0.0021528 L |
| 2.5 fL | 0.002691 L |
| 5 fL | 0.005382 L |
| 10 fL | 0.0107639 L |
| 15 fL | 0.0161459 L |
| 20 fL | 0.0215278 L |
| 25 fL | 0.0269098 L |
| 30 fL | 0.0322917 L |
| 50 fL | 0.0538196 L |
How to Convert Foot-lamberts to Lamberts
To convert foot-lamberts to lamberts, multiply the luminance by the following conversion ratio: 0.0010764 lamberts/foot-lambert.
Since one foot-lambert is equal to 0.0010764 lamberts, you can use this simple formula to convert:
The luminance in lamberts is equal to the luminance in foot-lamberts multiplied by 0.0010764.
For example, here's how to convert 5 foot-lamberts to lamberts using the formula above.
How Many Lamberts Are in a Foot-lambert?
There are 0.0010764 lamberts in a foot-lambert, which is why we use this value in the formula above.
Our foot-lambert to lambert calculator automatically converts your luminance measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Foot-lamberts and lamberts are both units used to measure luminance. Keep reading to learn more about each unit.
What Is a Foot-lambert?
A foot-lambert is a unit of luminance equal to 3.4262591 candelas per sq. meter (cd/m²), the base unit for luminance. Cinema projection luminance unit (1/π cd/ft² ≈ 3.426 cd/m²). [1]
The foot-lambert is classified as a US customary unit of luminance. Foot-lamberts can be abbreviated as fL; for example, 1 foot-lambert can be written as 1 fL.
When working with foot-lamberts (fL) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, foot-lamberts (fL) are widely used across standard luminance applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Lambert?
A lambert is a unit of luminance equal to 3,183.0988618 candelas per sq. meter (cd/m²), the base unit for luminance. Equal to (10,000/π) ≈ 3,183.099 cd/m². [2]
The lambert is classified as a metric and SI-compatible unit of luminance. Lamberts can be abbreviated as L; for example, 1 lambert can be written as 1 L.
When working with lamberts (L) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, lamberts (L) are widely used across large-scale industrial, bulk, and macro-level luminance specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting luminance between foot-lamberts (fL) and lamberts (L), keep full floating-point precision (1 fL = 0.0010764 L; 1 L = 929.0303999 fL) during intermediate calculations and round only the final lambert figure to match your instrument tolerance.
More Foot-lambert & Lambert Conversions
Need to calculate in the opposite direction? Use our lamberts to foot-lamberts calculator to switch your starting unit immediately. You can also explore related tools such as converting lamberts to foot-lamberts, converting candelas per sq. meter (nits) to lamberts, or converting candelas per sq. meter (nits) to kilocandelas per square meter.
Convert from Foot-lamberts
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Luminance Metrology Standard — Foot-lamberts (fL) to Lamberts (L)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Foot-lambert (fL) & Lambert (L)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (fL to L)