Electricity Consumption Calculator
Estimate household electricity use from a list of appliances, wattages, hours per day and quantities.
Your inputs
Results
Monthly consumption
132 kWh
- Daily consumption
- 4.4 kWh
- Yearly consumption
- 1,606 kWh
- Monthly cost
- $19.80
≈Estimate based on the stated model and assumptions
Notes for this result
- Fridges and other cycling appliances draw far less than their rated maximum on average — use measured or label (annual kWh) figures where possible.
| Appliance | kWh/day | kWh/month |
|---|---|---|
| Fridge (average draw) | 3.6 | 108 |
| TV | 0.4 | 12 |
| LED bulbs | 0.4 | 12 |
What this calculator does
An appliance-by-appliance audit shows where your energy goes and what to target.
Formula and method
Worked example
Calculated by this tool with its default inputs:
Inputs
- Appliances — one per line: name, watts, hours per day, quantity: Fridge (average draw), 150, 24, 1 TV, 100, 4, 1 LED bulbs, 10, 5, 8
- Days per month: 30
- Price per kWh (optional): 0.15 (any currency)
Results
- Monthly consumption: 132 kWh
- Daily consumption: 4.4 kWh
- Yearly consumption: 1,606 kWh
- Monthly cost: 19.8
How to read the results
The breakdown table highlights the largest consumers.
Assumptions and limitations
- Use average, not peak, power for cycling appliances such as fridges.
These are educational estimates. Electrical, structural and other safety-critical work must comply with local codes and be designed or checked by a qualified professional.
Questions
Why doesn’t this match my bill?
Bills include all devices, standby loads and seasonal heating or cooling.
Methodology and verification
- Result type
- Estimate based on the stated model and assumptions
- Formula version
- 1.0
- Automated verification
- 2 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
- Editorial review
- Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.
Privacy
Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy