Lighting Calculator – Calculate Fixtures

Designing the right lighting for a room isn’t just about brightness—it’s about comfort, efficiency, and safety. With our Lighting Calculator, you can easily determine the number of fixtures required for any space based on room dimensions, desired illuminance (lux), fixture lumen output, and important factors such as Coefficient of Utilization (CU), Light Loss Factor (LLF), and Spacing Criteria (SC).

Whether you’re an electrician, engineer, architect, or DIY enthusiast, this tool helps you achieve professional lighting results. From offices and workshops to classrooms and warehouses, you’ll know exactly how many lights are needed to create a well-lit environment while optimizing energy usage.

💡 Lighting Calculator

Calculate how many light fixtures your room needs

Room Type:

📏 Room Length (m):

📏 Room Width (m):

💡 Required Illuminance (Lux):

🔆 Fixture Lumen Output (lm):

Extra Lighting Margin (%):

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