📽️ ProjectorDB

Running cost calculator

$0$93$186123456789101112hours of use per day (cost per year at 250 W, $0.17/kWh)$47

A 250 W projector gives off about 853 BTU/h of heat, like 2.5 100 W bulbs. Used 3 hours a day it draws 274 kWh a year, which costs $46.54 at $0.17 per kWh.

Nearly all of a projector's electrical draw ends up as heat in the room: 1 W = 3.412 BTU/h. Default wattage, hours and price are illustrative, not a specific model. Yearly figures assume the projector draws the stated watts for every hour of use.

Power draw250 W
Hours per day3 h
Price per kWh$0.17
Heat output
853 BTU/h250 W × 3.412
Same heat as
2.5 × 100 W bulbs
Energy per year
274 kWh
Cost per year
$46.54$3.88 per month
Show the numbers
Watts250
BTU/h853.0
Hours per day3
kWh per year273.8
Price per kWh$0.17
Cost per year$46.54
A 250 W projector gives off about 853 BTU/h of heat, like 2.5 100 W bulbs. Used 3 hours a day it draws 274 kWh a year, which costs $46.54 at $0.17 per kWh.