---
title: "Electricity Cost Calculator: Watts, kWh and Seasonal Use"
description: "Calculate appliance energy costs with your measured usage, duty cycle, season and state or custom rate."
url: https://electricitycostbystate.com/calculator/
updated: 2026-09-28
site: "Electricity Cost by State"
language: en-US
---

# Electricity cost calculator

Use measured watts, daily or annual energy, or a per-cycle label. Your usage, season and rate stay together in one estimate.

Estimated electricity cost at 18.3¢ per kWh

$67 per month

- **Use day**: $2.20
- **Year**: $801.98
- **Energy per month**: 365 kWh
- **Energy per year**: 4,380 kWh

EIA residential revenue per kWh sold, July 2026. Includes fixed-charge revenue in the average; this is a benchmark, not the marginal saving from switching an appliance off. [Calculation method](https://electricitycostbystate.com/methodology/)

## Your calculation

365 kWh per month × 18.3¢ per kWh = $66.83. Annual energy is 4,380 kWh.

An average month is 365/12 days. The annual total uses 365 calendar days in the selected months, scaled by your use days per average month. February has 28 days.

[Link to this scenario](https://electricitycostbystate.com/calculator/?mode=watts&watts=1500&kwh=12&annual=400&cycle=0.5&cycles=1&hours=8&duty=100&days=30.416666666667&months=&state=&rate_basis=benchmark&rate=18.31)

The scenario URL contains your entries. Share it only with people you choose.

## Choose the right measure

Watts × hours × duty cycle ÷ 1,000 gives kWh. Measured daily, cycle and annual kWh already include the appliance cycling on and off. A washer's motor energy can exclude hot water; include separately measured water-heating energy when comparing a full laundry load.

[Compare fixed and time-of-use rate plans](https://electricitycostbystate.com/rate-plan-calculator/) · [Appliance assumptions](https://electricitycostbystate.com/cost-to-run/) · [State benchmarks](https://electricitycostbystate.com/electricity-rates/)