Convert watts to lumens using lighting efficiency. Estimate total lumens, fixture brightness, lumens per square foot, LED equivalent watts, room brightness, monthly energy use, and lighting cost.
Watts:
Enter the wattage of a bulb, fixture, or group of fixtures.
Lumens per watt:
Choose the lighting efficiency based on the bulb type or enter a custom value.
Lumens:
The calculator multiplies watts by lumens per watt to estimate brightness.
A watts to lumens calculator helps compare brightness between incandescent, halogen, CFL, fluorescent, HID, and LED lighting.
It can help with bulb replacement, LED upgrades, room brightness planning, shop lighting, office lighting, garage lighting, and energy cost estimates.
Your result shows estimated total lumens, adjusted lumens after light loss, lumens per square foot, LED equivalent watts, total watts, monthly kWh, monthly cost, yearly cost, target brightness percentage, and detailed fixture row totals.
Multiply watts by lumens per watt. For example, a 10 watt LED at 100 lumens per watt produces about 1,000 lumens.
A traditional 60 watt incandescent bulb is commonly around 800 lumens. A 60 watt LED fixture could be much brighter because LEDs produce more lumens per watt.
Watts measure energy use. Lumens measure light output. Efficient bulbs can make more light using fewer watts.
Many LED bulbs and fixtures fall around 80 to 160 lumens per watt, depending on design, quality, color temperature, and driver efficiency.