Lamberts to Foot-lamberts Converter
Enter the luminance in lamberts below to convert it to foot-lamberts.
Convert Lamberts to Foot-lamberts
Enter a value in lamberts (L) to convert to foot-lamberts (fL).
Lambert to Foot-lambert Conversion Table
Table showing various lambert measurements converted to foot-lamberts. Click any preset value or arrow to load it into the converter.
| Lamberts (L) | Foot-lamberts (fL) |
|---|---|
| 1 L | 929.0303999 fL |
| 2 L | 1,858.0607998 fL |
| 2.5 L | 2,322.5759998 fL |
| 5 L | 4,645.1519995 fL |
| 10 L | 9,290.303999 fL |
| 15 L | 13,935.4559985 fL |
| 20 L | 18,580.607998 fL |
| 25 L | 23,225.7599975 fL |
| 30 L | 27,870.911997 fL |
| 50 L | 46,451.5199951 fL |
How to Convert Lamberts to Foot-lamberts
To convert lamberts to foot-lamberts, multiply the luminance by the following conversion ratio: 929.0303999 foot-lamberts/lambert.
Since one lambert is equal to 929.0303999 foot-lamberts, you can use this simple formula to convert:
The luminance in foot-lamberts is equal to the luminance in lamberts multiplied by 929.0303999.
For example, here's how to convert 5 lamberts to foot-lamberts using the formula above.
How Many Foot-lamberts Are in a Lambert?
There are 929.0303999 foot-lamberts in a lambert, which is why we use this value in the formula above.
Our lambert to foot-lambert calculator automatically converts your luminance measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Lamberts and foot-lamberts are both units used to measure luminance. Keep reading to learn more about each unit.
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. [1]
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.
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). [2]
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.
When converting luminance between lamberts (L) and foot-lamberts (fL), keep full floating-point precision (1 L = 929.0303999 fL; 1 fL = 0.0010764 L) during intermediate calculations and round only the final foot-lambert figure to match your instrument tolerance.
More Lambert & Foot-lambert Conversions
Need to calculate in the opposite direction? Use our foot-lamberts to lamberts calculator to switch your starting unit immediately. You can also explore related tools such as converting foot-lamberts to lamberts, converting lamberts to candelas per sq. meter (nits), or converting candelas per sq. meter (nits) to kilocandelas per square meter.
Convert from Lamberts
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Luminance Metrology Standard — Lamberts (L) to Foot-lamberts (fL)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Lambert (L) & Foot-lambert (fL)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (L to fL)