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Home › Lighting Calculators › Footcandles to Lux

Footcandles → Lux

Convert footcandles to lux (1 fc = 10.7639 lx).

Result

0 lx

ℹ️ About Foot-Candles to Lux Calculator

The Foot-Candles to Lux Calculator converts Foot-Candles to Lux instantly. Essential for lighting designers, electricians, architects, and anyone working with illumination calculations.

📋 How to Use

  1. Enter the Foot-Candles value.
  2. Enter any required additional values (area, distance, efficacy).
  3. Click Calculate to get the result in Lux.
  4. Use the result for your lighting design or specification.

🔢 Formula / Calculation Method

Lux = Foot-candles × 10.764

1 fc = 10.764 lux

👥 Who Uses It

  • Lighting designers specifying fixtures
  • Architects calculating room illumination
  • Electricians sizing lighting circuits
  • Photographers calculating studio lighting
  • Homeowners choosing LED bulb replacements

📌 Practical Examples

Office Lighting
Need 500 lux in 20m² office → calculate required lumens.
LED Replacement
Replace 60W incandescent → use Foot-Candles to Lux to find equivalent LED.
Photography
Calculate lux at subject distance for studio photography.
Retail Display
Specify foot-candles for product display illumination.

⭐ Benefits

💡
Accurate
Precise lighting calculations
⚡
Instant
Immediate conversions
🎯
Professional
Industry-standard formulas
📱
Mobile
Use on site
🆓
Free
No cost or login
📋
Formula
Understand the math

💡 Tips

  • 💡Use LED efficacy of 80–120 lm/W for modern LED fixtures.
  • 💡For offices, target 300–500 lux; for detailed work, 500–1000 lux.
  • 💡Inverse square law: doubling distance quarters the lux (Lux ∝ 1/d²).
  • 💡Foot-candles are still used in US specifications; lux is the SI (metric) unit.

❓ Frequently Asked Questions

How do I convert Foot-Candles to Lux?
Use the formula: Lux = Foot-candles × 10.764
What is lux?
Lux (lx) is the SI unit of illuminance — lumens per square meter.
What is the difference between lumens and lux?
Lumens measure total light output; lux measures light intensity per unit area.
What is candela?
Candela (cd) measures luminous intensity — the power of light in a specific direction.
Is it free?
Yes, completely free.
What efficacy should I use for LEDs?
Modern LEDs: 80–120 lm/W. Use 100 lm/W as a reasonable estimate.

🔗 Related Calculators

💡Lumens to Lux 💡Lux to Lumens 💡Watts to Lumens 💡Lumens to Watts 💡Candela to Lux ⚡Energy Cost

🚀 Features

⚡
Instant Results
Calculate in seconds, no waiting
🎯
High Accuracy
Precise results every time
📱
Mobile Friendly
Works on any device or screen size
🔒
Privacy First
No data stored or shared
🌍
Works Worldwide
Available 24/7 from anywhere
🆓
100% Free
Always free, no registration needed

⚠️ Common Mistakes to Avoid

  • ⚠️Using wrong efficacy for bulb type (LED vs halogen vs incandescent).
  • ⚠️Forgetting that lux varies with distance (inverse square law).
  • ⚠️Confusing luminous flux (lumens) with luminous intensity (candela).
  • ⚠️Not accounting for room reflectivity (walls, ceiling) in real-world design.

📖 Glossary

Lumen (lm)
Total amount of visible light emitted by a source.
Lux (lx)
Lumens per square meter — illuminance at a surface.
Candela (cd)
Luminous intensity in a specific direction.
Foot-candle
US unit of illuminance — 1 foot-candle = 10.764 lux.
Efficacy
Light output per watt of power (lm/W).
Solid Angle
3D angle in steradians that a light source illuminates.

📢 Disclaimer

Lighting calculations are theoretical estimates. Real-world results vary based on fixture type, room reflectivity, obstructions, and installation conditions. Consult a lighting professional for critical designs.