28 Lux to Foot-Candle
Quick answer
28 Lux (lx) equals
2.601285 fc
To convert 28 Lux to Foot-Candles, multiply by 0.0929030436. Therefore, 28 Lux (lx) equals 2.601285 Foot-Candle (fc).
Formula: fc = lx × 0.0929030436. Calculation: 28 × 0.0929030436 = 2.601285 fc.
Convert Lux (lx) to Foot-Candle (fc) online with our free unit converter. In illuminance, 1 lx = 0.092903 fc. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Lux to Foot-Candle
- Step 1 — start with the formula. fc = lx × 0.0929030436
- Step 2 — substitute your figure. 28 lx × 0.0929030436
- Step 3 — read the result. 28 lx = 2.601285 fc
- Step 4 — check it in reverse. lx = fc × 10.76391 returns 28 lx, which matches the figure you started with.
Illuminance Converter
4 units available
28 lx = 2.601285 fc
Formula:
fc = lx × 0.0929030436With your value: 28 lx = 2.60128522 fc
Other Lux to Foot-Candle conversions
Lux to Foot-Candle Conversion Table
| Lux (lx) | Foot-Candle (fc) |
|---|---|
| 0.5 | 0.046452 |
| 1 | 0.092903 |
| 2 | 0.185806 |
| 5 | 0.464515 |
| 10 | 0.92903 |
| 15 | 1.393546 |
| 20 | 1.858061 |
| 25 | 2.322576 |
| 50 | 4.645152 |
| 100 | 9.290304 |
| 250 | 23.225761 |
| 500 | 46.451522 |
| 1000 | 92.903044 |
Foot-Candle to Lux Conversion Table
| Foot-Candle (fc) | Lux (lx) |
|---|---|
| 0.5 | 5.381955 |
| 1 | 10.76391 |
| 2 | 21.52782 |
| 5 | 53.81955 |
| 10 | 107.6391 |
| 15 | 161.45865 |
| 20 | 215.2782 |
| 25 | 269.09775 |
| 50 | 538.1955 |
| 100 | 1,076.391 |
| 250 | 2,690.9775 |
| 500 | 5,381.955 |
| 1000 | 10,763.91 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Lux (lx)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Foot-Candle (fc)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Standards and context behind Lux to Foot-Candle
- EN 12464-1
- European workplace lighting standard specified in lux.
- IES
- US practice quotes foot-candles; 1 fc = 10.7639 lx.
How to Convert Lux to Foot-Candle
To convert from Lux (lx) to Foot-Candle (fc), multiply the value by 0.0929030436.
Formula: fc = lx × 0.0929030436
Reverse: lx = fc × 10.76391
Step-by-Step Example
- Start with your value in Lux. For example: 5 lx
- Multiply by the conversion factor: 5 x 0.0929030436
- The result is: 0.464515 fc
Lux and Foot-Candle Relationship
This calculation facilitates standardized conversion between recognized units of illuminance. Since 1 Lux represents a fraction of a Foot-Candle (1 Foot-Candle ≈ 10.7639 Lux), the Foot-Candle is the larger measurement interval. Understanding the relationship between Lux and Foot-Candle is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Lux
Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
Fun Fact: Direct sunlight is about 32,000 to 100,000 lux.
Common uses of Lux: lighting design, photography, workspace safety.
About Foot-Candle
The Foot-Candle (symbol: fc) is a recognized unit in the US Customary / Imperial measurement framework, utilized within illuminance applications for precision and standardized data representation.
Common uses of Foot-Candle: illuminance calculations, engineering and science, education.
Frequently Asked Questions
- What is 28 Lux in Foot-Candle?
- 28 Lux equals 2.601285 Foot-Candle.
- How many Foot-Candles are in 1 Lux?
- There are exactly 0.0929030436 Foot-Candles in 1 Lux. This means the conversion factor from Lux to Foot-Candle is 0.0929030436.
- What is the formula to convert Lux to Foot-Candle?
- The formula to convert Lux to Foot-Candle is: fc = lx × 0.0929030436. For example, to convert 10 Lux to Foot-Candles, you would multiply 10 by 0.0929030436.
- What is a Lux?
- Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
- What is a Foot-Candle?
- The Foot-Candle (symbol: fc) is a recognized unit in the US Customary / Imperial measurement framework, utilized within illuminance applications for precision and standardized data representation.
- What are the common uses of Lux?
- The Lux is commonly used in lighting design, photography, workspace safety.
- How many lux is an office meant to have?
- EN 12464-1 sets 500 lx (about 46 fc) for general office work.
Related Illuminance Conversions
Cite this page
UnitConvertLab. (2026). 28 Lux to Foot-Candle. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/28-lux-to-foot_candle