1. What is a Footcandles to Lux Calculator?

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

Purpose: It helps lighting professionals, photographers, and engineers convert between these common light measurement units.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Lux} \) — Illuminance in lux (metric unit)
• \( \text{FC} \) — Illuminance in foot-candles (imperial unit)

Explanation: 1 foot-candle equals approximately 10.764 lux, as it represents 1 lumen per square foot versus lux being 1 lumen per square meter.

3. Importance of Unit Conversion

Details: Proper conversion ensures accurate lighting specifications when working with international standards or equipment that uses 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 is a foot-candle?
A: A foot-candle is a unit of illuminance equal to 1 lumen per square foot.

Q2: What is a lux?
A: A lux is the metric unit of illuminance equal to 1 lumen per square meter.

Q3: Why is the conversion factor 10.764?
A: This comes from the square meter to square foot conversion (1 m² ≈ 10.764 ft²).

Q4: When would I need this conversion?
A: When comparing lighting specifications from different regions or working with equipment that uses different units.

Q5: Is this conversion exact?
A: The 10.764 factor is precise enough for most practical applications, though the exact conversion is 1 fc = 10.76391 lx.