How the electricity cost calculator works
Estimate 30-day electricity cost for an appliance. Enter measurements in the units shown. The calculation uses a simple geometric or cost model and adds an allowance where appropriate.
Worked example
Try power (watts): 1000, hours per day: 3, and electricity rate ($/kwh): 0.18. The calculator above starts with these values so you can reproduce the result and change each input to match your project.
Before you buy materials
Measure at more than one point, note doors and openings, and verify the specifications of your chosen products. Complex layouts, uneven surfaces and installation methods can change the actual quantity required. Keep your measurements and request a supplier or contractor quote for larger jobs.
Frequently asked questions
Is this estimate exact?
No. It is a planning estimate based on the measurements and assumptions you provide. Actual quantities and costs vary by product and installation conditions.
Should I buy extra material?
Many projects need extra material for cutting, breakage or mistakes. The result explains whether an allowance is included. Check your supplier’s recommendations.
Can I use metric measurements?
This version uses the US units shown next to each field. Convert measurements before entering them to avoid mixing units.