Appliance running cost calculator

What one device costs to run.

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18

Power (watts)

Hours per day

Rate per kWh

Cost per day

$0.46

Per year

$166.44

With these inputs, cost per day comes to $0.46. Per year works out to $166.44. The result assumes rate per kwh stays at 0.19%.

What moves the number · Cost per day

Input	−10%	Now	+10%
Power (watts)	$0.41	$0.46	$0.5
Hours per day	$0.41	$0.46	$0.5
Rate per kWh	$0.41	$0.46	$0.5

Whatmakesequal

Save this set of inputs, change something, then save again to compare the outcomes side by side.

What one device costs to run.

With the defaults above, cost per day works out at $0.46.