Lux to Foot-candle Calculator
Convert lux to foot-candles with step-by-step calculations. Essential for lighting design, photography, and ensuring compliance with international standards.
Lux to Foot-candle Converter
Common Lux to Foot-candle Conversions
Click on these links to see instant conversions with common values:
Understanding Lux to Foot-candle Conversion
Lux and foot-candle are both units of illuminance, which measures the total luminous flux incident on a surface, per unit area. The conversion between them is straightforward as it's a direct unit conversion.
Conversion Formula
Where:
• foot-candle = illuminance in foot-candles (lm/ft²)
• lux = illuminance in lux (lm/m²)
• 10.764 is the conversion factor (1 square meter ≈ 10.764 square feet)
Key Concepts
- Lux (lx): The SI (metric) unit of illuminance, defined as one lumen per square meter.
- Foot-candle (fc): An imperial unit of illuminance, defined as one lumen per square foot.
- Illuminance: The amount of light falling on a given surface area.
Typical Illuminance Levels
| Environment | Lux (lx) | Foot-candles (fc) |
|---|---|---|
| Moonlight | 0.1 | 0.01 |
| Dim Office Lighting | 200-300 | 20-30 |
| Typical Office Lighting | 538 | 50 |
| Bright Office Lighting | 800-1000 | 75-100 |
| Overcast Day (Outdoor) | 1000-10000 | 100-1000 |
| Direct Sunlight | 107527 | 10000 |
Frequently Asked Questions
How do you convert lux to foot-candles?
Divide the lux value by 10.764 to get the equivalent illuminance in foot-candles.
What is the difference between lux and foot-candle?
Lux is a metric unit (lumens per square meter), while foot-candle is an imperial unit (lumens per square foot). A foot-candle is approximately 10.764 times larger than a lux.
Why is it important to convert between lux and foot-candles?
It's important for compatibility in international projects, adhering to different regional lighting standards, and understanding product specifications that may use either unit.