Electricity Bill Calculator
Estimate your electricity bill from kWh usage, unit rate and standing charges.
What this tool does
An electricity bill calculator estimates what you will pay for electricity over a billing period. Enter how many kilowatt-hours you use, the price per kWh, any standing charge (a fixed daily or monthly fee), and the billing period. The calculator multiplies usage by the rate, adds fixed charges, and shows the total. For tiered tariffs where the price changes after a threshold, it splits the calculation at the threshold.
Multiplies your electricity consumption in kWh by the unit price to get the energy charge.
Adds a standing charge (fixed daily or monthly fee) for the billing period.
Supports tiered pricing where the unit rate changes after a usage threshold.
Shows the breakdown of energy charges versus fixed charges so the bill is transparent.
How to use it
- Enter your electricity consumption in kWh for the period.
- Enter the unit price per kWh from your tariff or bill.
- Enter the standing charge if your tariff has one.
- Choose the billing period (monthly, quarterly or custom).
- Read the estimated bill and the breakdown of charges.
Why use this calculator
Shows the breakdown of energy charges versus fixed charges, because understanding where the money goes is the first step to reducing it. Many people look only at the total bill and cannot see whether their usage or their tariff is driving the cost. This calculator separates the two, so you can see exactly how much of the bill is the standing charge you pay even with zero usage, and how much is the energy you actually consumed.
Why we built it
We built the electricity bill calculator to support tiered pricing, because that is how many real tariffs work and it is the case people most often get wrong. The energy consumption calculator works out how many kWh your appliances use, and the electricity cost calculator focuses on a single appliance's running cost.
If your task goes further, try the Unit Price Calculator to compare tariffs, and the Appliance Cost Calculator to find the biggest energy users in your home.
Who this tool is for
- Households estimating their next electricity bill
- People comparing tariffs or energy suppliers
- Anyone moving to a new home and budgeting for utilities
- Landlords working out utility costs for tenants
When to use it
- Estimating a future bill from a recent meter reading.
- Checking whether a quoted bill is reasonable.
- Comparing a tiered tariff against a flat-rate tariff.
- Budgeting for a change in usage, such as working from home or buying an EV.
How it is calculated
Energy charge = kWh × price per kWh. Total bill = energy charge + standing charge. For tiered pricing: the first block of kWh is charged at the lower rate, and any usage above the threshold at the higher rate.
Worked example: 350 kWh in a month at $0.28 per kWh with a $0.30 per day standing charge. Energy charge = 350 × 0.28 = $98. Standing charge = 30 × 0.30 = $9. Total = $107. If the tariff charges $0.28 for the first 200 kWh and $0.35 above that, the energy charge becomes 200 × 0.28 + 150 × 0.35 = 56 + 52.50 = $108.50.
VAT or sales tax is added on top in many countries. Check whether your tariff price is inclusive or exclusive of tax.
What you enter, and what you get back
| Item | Details |
|---|---|
| Consumption | Electricity used in kWh over the period. |
| Unit price | Price per kWh, with support for a tiered threshold. |
| Standing charge | A fixed daily or monthly fee added regardless of usage. |
| Result | Estimated bill with a breakdown of energy and fixed charges. |
Issues you may run into
| What you see | Why it happens | What to do |
|---|---|---|
| Estimate is lower than the real bill | Tiered pricing or extra fees were not included. | Enter the tier threshold and any additional charges. |
| Standing charge seems high | It is charged even at zero usage. | Check your tariff terms. |
| Unit price differs from your bill | Prices are quoted exclusive of VAT or with discounts. | Use the final price you pay per kWh. |
A worked example
These are the values the calculator opens with, so you can see exactly what it does with them. Change any value on the page and the result updates; the figures below come from the same calculation.
| Input | Value |
|---|---|
| Currency symbol | $ (dollar) |
| Consumption | 350 kWh |
| Unit price | $0.28 per kWh |
| Standing charge | $0.30 per day |
| Billing period | Monthly (30 days) |
With those inputs, the calculator returns:
- Energy charge: $98.00
- Standing charge: $9.00
- Total estimated bill: $107.00
Assumptions and limitations
- An estimate based on your inputs; actual bills vary with meter reads and tariff changes.
- Does not include VAT, levies, discounts or payment-method surcharges unless added manually.
- Time-of-use tariffs with different rates for peak and off-peak are not modelled.
- A planning aid, not a bill - always check your actual statement.
Frequently asked questions
How do I calculate my electricity bill?
Multiply your electricity consumption in kWh by the price per kWh, then add any standing charge for the billing period. This calculator does both, including tiered pricing where the rate changes after a threshold.
What is a standing charge?
A standing charge is a fixed daily or monthly fee added to your electricity bill regardless of how much energy you use. It covers the cost of maintaining the connection to the grid. Even if you use no electricity, you still pay the standing charge.
How does tiered pricing work?
Tiered pricing charges different rates for different levels of usage. For example, the first 200 kWh might cost $0.28 per kWh, and anything above that $0.35 per kWh. The calculator splits your usage at the threshold and applies the correct rate to each block.
What is the average electricity bill?
The average household electricity bill varies widely by country and home size. In the United States, the average monthly electricity bill is around $120 to $150. In the United Kingdom, it is closer to £80 to £100 per month. Climate, home size and tariff all make a large difference.
How do I reduce my electricity bill?
Reduce usage by switching to LED lighting, improving insulation, using energy-efficient appliances and turning off standby devices. Also compare tariffs, and consider whether a time-of-use tariff would reward you for shifting usage to off-peak hours.
Does this include gas?
No - this calculator is for electricity only. Gas is a separate utility with its own tariff, standing charge and consumption measured in kWh or therms.