Foot-candles to Lux Converter
Enter the illumination in foot-candles below to convert it to lux.
Convert Foot-candles to Lux
Enter a value in foot-candles (fc) to convert to lux (lx).
Foot-candle to Lux Conversion Table
Table showing various foot-candle measurements converted to lux. Click any preset value or arrow to load it into the converter.
| Foot-candles (fc) | Lux (lx) |
|---|---|
| 1 fc | 10.7639104 lx |
| 2 fc | 21.5278208 lx |
| 5 fc | 53.819552 lx |
| 10 fc | 107.639104 lx |
| 15 fc | 161.458656 lx |
| 20 fc | 215.278208 lx |
| 25 fc | 269.09776 lx |
| 30 fc | 322.917312 lx |
| 50 fc | 538.19552 lx |
| 75 fc | 807.29328 lx |
How to Convert Foot-candles to Lux
To convert foot-candles to lux, multiply the illumination by the following conversion ratio: 10.7639104 lux/foot-candle.
Since one foot-candle is equal to 10.7639104 lux, you can use this simple formula to convert:
The illumination in lux is equal to the illumination in foot-candles multiplied by 10.7639104.
For example, here's how to convert 10 foot-candles to lux using the formula above.
How Many Lux Are in a Foot-candle?
There are 10.7639104 lux in a foot-candle, which is why we use this value in the formula above.
Our foot-candle to lux calculator automatically converts your illumination measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Foot-candles and lux are both units used to measure illumination. Keep reading to learn more about each unit.
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). [1]
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.
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. [2]
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.
When converting illumination between foot-candles (fc) and lux (lx), keep full floating-point precision (1 fc = 10.7639104 lx; 1 lx = 0.092903 fc) during intermediate calculations and round only the final lux figure to match your instrument tolerance.
More Foot-candle & Lux Conversions
Need to calculate in the opposite direction? Use our lux to foot-candles converter (lx to fc) to switch your starting unit immediately. You can also explore related tools such as converting kilolux to lux, converting millilux to lux, or converting lux to kilolux.
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Illumination Metrology Standard — Foot-candles (fc) to Lux (lx)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Foot-candle (fc) & Lux (lx)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (fc to lx)