Estimate total lumens, lumens per fixture, lumens per square foot, LED wattage, fixture quantity, room brightness, and lighting energy use. This calculator helps plan lighting for rooms, garages, shops, offices, warehouses, and outdoor areas.
Total lumens:
The calculator multiplies fixture lumens by quantity or totals detailed fixture rows.
Room brightness:
Total lumens are divided by room area to estimate lumens per square foot.
LED wattage:
Lumens per watt are used to estimate how many watts are needed for a target lumen level.
A lumens calculator helps estimate how bright a room or space will be before buying fixtures or bulbs.
It can help with bedrooms, kitchens, garages, shops, offices, warehouses, exterior lighting, LED upgrades, fixture planning, and energy cost estimates.
Your result shows total lumens, adjusted lumens, target lumens, lumens per square foot, fixture count needed, estimated LED watts, total wattage, monthly kWh, monthly cost, yearly cost, and detailed fixture row totals.
Lumens measure the amount of visible light a bulb or fixture produces. More lumens usually means brighter light.
Multiply the room area by your target lumens per square foot. General rooms may use 30 to 50 lumens per square foot, while task areas may need more.
Multiply watts by lumens per watt. For example, a 10W LED at 100 lumens per watt produces about 1,000 lumens.
Yes. Lumens tell you brightness, while watts tell you energy use. LED bulbs can produce the same brightness with fewer watts.