# Electricity Cost Calculator

URL: https://speedycalculator.com/calculators/everyday-life/electricity-cost/
Last updated: 2026-10-25

> The electricity cost calculator works out how much it costs to run an appliance per day, month and year from its power in watts, the hours it runs and your electricity price.

## Inputs

- Power consumption (W, kW, hp)
- Usage per day (h)
- Days used per week
- Quantity
- Electricity price (/kWh)

## Results

- Energy per day of use
- Cost per day of use
- Cost per month
- Cost per year
- Energy per year

## Formula

```
Energy (kWh) = power (W) × hours ÷ 1,000
Cost = energy × price per kWh
Yearly = daily × days used per week × 52.18
```

## Explanation

Electricity is billed in kilowatt-hours. A 1,000 W appliance running for one hour uses 1 kWh. Knowing the cost of each appliance helps decide which to replace or use less – heating, cooling and anything that runs around the clock add up quickly.

### How to use the Electricity Cost Calculator

- **Power consumption**
- **Usage per day**
- **Days used per week**
- **Quantity**
- **Electricity price**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the appliance power, how many hours a day and days a week it runs, the number of identical appliances and your price per kWh.

### Tips

- Use the figures from your own bills and product labels – prices and appliance ratings vary widely.
- Look at yearly totals: small daily costs add up and make it easier to compare options.
- Round quantities up to whole packs, rolls or bulbs when you shop.
- Re-check the numbers when prices change; most results scale directly with the unit price.

### Common mistakes to avoid

- Confusing watts (power) with watt-hours or kilowatt-hours (energy).
- Comparing prices without bringing them to the same unit first.
- Ignoring one-off costs such as installation, delivery or replacement parts.

### Inputs explained

FieldWhat to enterPower consumptionUnits: W, kW, hpUsage per dayIn hDays used per weekA numberQuantityA numberElectricity priceUnits: /kWh

### What each result means

- **Energy per day of use** = [Power consumption]×[Usage per day]×[Quantity]÷1000
- **Cost per day of use** = [Energy per day of use]×[Electricity price]
- **Cost per month** = [Cost per day of use]×[Days used per week]×52.18÷12
- **Cost per year** = [Cost per day of use]×[Days used per week]×52.18
- **Energy per year** = [Energy per day of use]×[Days used per week]×52.18

### Example values

How the main result changes when **Power consumption** changes and everything else stays at the example values above:

Power consumption (W)Cost per year50087.66750131.491,000175.321,250219.161,500262.992,000350.65

## Worked example

Inputs — Power consumption: 1,000 W; Usage per day: 3 h; Days used per week: 7; Quantity: 1; Electricity price: $0.16 /kWh.

Results — Energy per day of use = 3 kWh; Cost per day of use = $0.48; Cost per month = $14.61; **Cost per year = $175.32**; Energy per year = 1,096 kWh.

## FAQ

**How much does it cost to run a 1,000 W heater?**
1 kWh per hour – 16 cents an hour at $0.16/kWh, or about $1.44 for 9 hours.

**How do I find an appliance's wattage?**
Check the rating label (W or VA) or multiply volts × amps.

**What is the average electricity price?**
In the U.S. about 16–17 cents/kWh for homes in 2024–2025; prices vary widely by state and country.

**What formula does the Electricity Cost Calculator use?**
Energy (kWh) = power (W) × hours ÷ 1,000.


## Sources

- [U.S. EIA – Electric Power Monthly, average retail price](https://www.eia.gov/electricity/monthly/)