Convert Foot-candle to Lumen per Square Foot
Convert foot-candles to lumens per square foot by entering a value below.
How to Convert Foot-candles to Lumens per Square Foot
The foot-candle and lumen per square foot are both units of illuminance. By definition, 1 foot-candle equals exactly 1 lumens per square foot. This means to convert foot-candles to lumens per square foot, you multiply by 1.
Formula
Step-by-Step Example
Convert 5 fc to lumens per square foot:
We need to convert foot-candles to lumens per square foot
Since 1 fc = 1 lm/ft², multiply by 1
5 × 1 = 5
5 fc = 5 lm/ft²
Foot-candle to Lumen per Square Foot Conversion Table
Quick reference table for common foot-candle to lumen per square foot conversions. Click any value for detailed calculation.
| Foot-candles (fc) | Lumens per Square Foot (lm/ft²) |
|---|---|
| 1 fc | 1 lm/ft² |
| 2 fc | 2 lm/ft² |
| 5 fc | 5 lm/ft² |
| 10 fc | 10 lm/ft² |
| 15 fc | 15 lm/ft² |
| 20 fc | 20 lm/ft² |
| 25 fc | 25 lm/ft² |
| 50 fc | 50 lm/ft² |
| 100 fc | 100 lm/ft² |
About These Units
Foot-candle (fc)
A foot-candle (fc) is the imperial illuminance unit—light from one candela source at one foot distance, equal to 10.764 lux. US lighting standards: office 30-50 fc, retail 50-100 fc, warehouse 10-30 fc. IESNA recommendations use foot-candles. One fc = one lumen per square foot.
Lumen per Square Foot (lm/ft²)
Lumens per square foot (lm/ft²) is identical to foot-candles. The defining relationship: one foot-candle = one lumen per square foot. Used in US lighting calculations: lumens needed = foot-candles × square feet. Standard in American architectural lighting design.
Frequently Asked Questions
How do I convert foot-candles to lumens per square foot?
To convert foot-candles to lumens per square foot, multiply the value by 1. For example, 10 fc = 10 lm/ft².
How many lumens per square foot are in 1 foot-candle?
1 foot-candle equals 1 lumens per square foot.
What is the formula for foot-candles to lumens per square foot?
The formula is: lm/ft² = fc × 1.