How to Calculate Lighting
What is Lighting?
A room lighting calculator determines the number of light fixtures and total lumens needed for a space based on room size and usage. General rule: 20–25 lumens per square foot for ambient lighting; task lighting (kitchen counters, reading areas) needs 50–75 lumens per square foot.
Step-by-Step Guide
- 1Input base values
- 2System computes results
Worked Examples
Input
Enter the required values
Result
Result computed by the formula
Common Mistakes to Avoid
- ✕Precision loss
- ✕Ignoring variables
Frequently Asked Questions
What does this calculator do?
Input base values
How do I use this calculator?
System computes results
Ready to calculate? Try the free Lighting Calculator
Try it yourself →