1. What is a Foot Candle to Lux Calculator?

Definition: This calculator converts illuminance measurements from foot-candles (fc) to lux (lx).

Purpose: It helps lighting professionals, architects, and engineers convert between these common units of illuminance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• 1 foot-candle (fc) = 10.764 lux (lx)
• 1 lux (lx) = 0.0929 foot-candles (fc)

Explanation: The conversion factor 10.764 comes from the ratio between square feet and square meters (1 ft² = 0.092903 m²).

3. Importance of Illuminance Conversion

Details: Proper conversion ensures accurate lighting specifications when working with international standards or different measurement systems.

4. Using the Calculator

Tips: Simply enter the foot-candle value you want to convert. The calculator will automatically compute the equivalent lux value.

5. Frequently Asked Questions (FAQ)

Q1: What are foot-candles and lux?
A: Both measure illuminance (light falling on a surface). Foot-candles are imperial units, lux are metric (SI) units.

Q2: Why is the conversion factor 10.764?
A: It's derived from the square meter to square foot conversion (1 m² = 10.764 ft²).

Q3: When would I need this conversion?
A: When working with international lighting standards, comparing specifications, or converting between measurement systems.

Q4: What's a typical foot-candle value for office lighting?
A: About 30-50 fc (323-538 lx) for general office work.

Q5: Is this conversion exact?
A: Yes, the conversion factor is mathematically precise, though real-world measurements may have slight variations.