1,500 watts to kWh per day and month

36.00 kWh/day

for 1,500 W running 24/7 · 1,080 kWh/month · $178.20/month at 16.5¢

1,500 W by hours of use

Use	Per day	Per month	Cost/month
1 h/day	1.50 kWh	45.0 kWh	$7.43
2 h/day	3.00 kWh	90.0 kWh	$14.85
4 h/day	6.00 kWh	180.0 kWh	$29.70
8 h/day	12.00 kWh	360.0 kWh	$59.40
12 h/day	18.00 kWh	540.0 kWh	$89.10
24 h/day	36.00 kWh	1,080.0 kWh	$178.20

kWh = W × hours ÷ 1000. Devices with thermostats or compressors cycle, so actual use is often lower than the rated wattage × hours.

36.00 kWh running 24 hours, 12.00 kWh at 8 hours.