Lux to Foot-candles Converter
Enter the illumination in lux below to convert it to foot-candles.
Convert Lux to Foot-candles
Enter a value in lux (lx) to convert to foot-candles (fc).
Lux to Foot-candle Conversion Table
Table showing various lux measurements converted to foot-candles. Click any preset value or arrow to load it into the converter.
| Lux (lx) | Foot-candles (fc) |
|---|---|
| 1 lx | 0.092903 fc |
| 2 lx | 0.1858061 fc |
| 5 lx | 0.4645152 fc |
| 10 lx | 0.9290304 fc |
| 15 lx | 1.3935456 fc |
| 20 lx | 1.8580608 fc |
| 25 lx | 2.322576 fc |
| 30 lx | 2.7870912 fc |
| 50 lx | 4.645152 fc |
| 75 lx | 6.967728 fc |
How to Convert Lux to Foot-candles
To convert lux to foot-candles, multiply the illumination by the following conversion ratio: 0.092903 foot-candles/lux.
Since one lux is equal to 0.092903 foot-candles, you can use this simple formula to convert:
The illumination in foot-candles is equal to the illumination in lux multiplied by 0.092903.
For example, here's how to convert 10 lux to foot-candles using the formula above.
How Many Foot-candles Are in a Lux?
There are 0.092903 foot-candles in a lux, which is why we use this value in the formula above.
Our lux to foot-candle calculator automatically converts your illumination measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Lux and foot-candles are both units used to measure illumination. Keep reading to learn more about each unit.
What Is a Lux?
SI derived unit of illuminance (1 lumen per square meter). It serves as a primary reference unit for measuring illumination across scientific and practical applications. [1]
The lux is classified as an International System of Units (SI) unit of illumination. Lux can be abbreviated as lx; for example, 1 lux can be written as 1 lx.
As the primary coherent reference unit for illumination in this category, all other illumination units are mathematically anchored to the lux (lx).
In practice, lux (lx) are widely used across standard illumination applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Foot-candle?
A foot-candle is a unit of illumination equal to 10.7639104 lux (lx), the base unit for illumination. Architectural and photography lighting unit (1 lm/ft² ≈ 10.7639 lux). [2]
The foot-candle is classified as a US customary unit of illumination. Foot-candles can be abbreviated as fc; for example, 1 foot-candle can be written as 1 fc.
When working with foot-candles (fc) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, foot-candles (fc) are widely used across standard illumination applications within US customary workflows, engineering documentation, and technical data sheets.
When converting illumination between lux (lx) and foot-candles (fc), keep full floating-point precision (1 lx = 0.092903 fc; 1 fc = 10.7639104 lx) during intermediate calculations and round only the final foot-candle figure to match your instrument tolerance.
More Lux & Foot-candle Conversions
Need to calculate in the opposite direction? Use our foot-candles to lux converter (fc to lx) to switch your starting unit immediately. You can also explore related tools such as converting lux to kilolux, converting lux to millilux, or converting kilolux to lux.
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Illumination Metrology Standard — Lux (lx) to Foot-candles (fc)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Lux (lx) & Foot-candle (fc)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (lx to fc)