Home energy planning

Energy Bill Calculator

Estimate an electricity bill from the usage for this bill or two meter readings, your price per kWh and optional fixed, standing and tax charges. The calculation is local and uses the assumptions you enter.

Quick estimate

Bill details

What do you know?Usage for this billMeter readings

Usage for this bill (kWh)Billing period (days)Editable whole-day period

Electricity price (USD/kWh)Example rate — replace with your rate.CurrencyDisplay only; changing currency does not convert the entered rate.

Advanced bill assumptions

Fixed charge for this bill (USD)Daily standing charge (USD/day)Tax applied to subtotal (%)

Actual utility taxes and fees may apply to different bill components. Enter an effective percentage only when this simplified model matches your bill.

Estimated electricity bill

$60.00

For this 30-day billing period

Energy used: 300 kWh
Energy charge: $60.00
Fixed charge for this bill: $0.00
Standing charge: $0.00
Tax applied to subtotal: $0.00
Total: $60.00

10 kWhaverage usage/day

$2.00average cost/day

What-if usage comparison

Current usage$60.00

10% less usage$54.00

20% less usage$48.00

Annualized run-rate estimate: 3,650 kWh/year · $730.00/year. This assumes the same daily usage and charges continue; it is not an expected annual bill.

Estimate where your electricity use comes from

How to calculate an electricity bill

Multiply energy used in kWh by your price per kWh, then add the fixed charge for this bill and any daily standing charge. Tax is applied to the subtotal using the effective percentage you enter.

Energy charge = kWh × price per kWh

Usage for this bill and meter readings

Use Usage for this bill when you already know the energy used during the selected billing period. In meter-reading mode, the calculator subtracts the previous reading from the current reading. Equal readings are valid and mean zero energy usage.

Annualized run-rate estimate

The annual figure divides this bill's energy and total cost by its billing days, then multiplies by 365. It assumes the same daily usage, prices and charges continue. It is a run-rate estimate, not an expected annual bill; seasonal usage and tariff changes are not modeled.

Fixed charges and taxes

Fixed charge for this bill and daily standing charge are entered for the selected period. Tax is a simplified user-entered assumption: actual utility taxes and fees may apply to different bill components.

Why your utility bill may differ

This calculator does not look up tariffs or model time-of-use, tiered, demand or net-metering rules. Use your actual bill and supplier information when available. The what-if comparison changes energy usage only; fixed and standing assumptions remain unchanged.

Average Residential Electricity Cost Reference Matrix

Estimated monthly and annual electricity expense across different household consumption levels and average utility electricity tariffs:

Estimated monthly bill by household size & average electricity rate ($0.12 to $0.30 per kWh)
Household Profile & Usage	Low Rate ($0.12/kWh)	US Avg ($0.16/kWh)	High Rate ($0.24/kWh)	Peak Rate ($0.32/kWh)
1-Bed Apartment (500 kWh/mo)	$60 / mo ($720/yr)	$80 / mo ($960/yr)	$120 / mo ($1,440/yr)	$160 / mo ($1,920/yr)
Average Home (900 kWh/mo)	$108 / mo ($1,296/yr)	$144 / mo ($1,728/yr)	$216 / mo ($2,592/yr)	$288 / mo ($3,456/yr)
Large Home + Central AC (1,500 kWh/mo)	$180 / mo ($2,160/yr)	$240 / mo ($2,880/yr)	$360 / mo ($4,320/yr)	$480 / mo ($5,760/yr)
All-Electric + EV + Heat Pump (2,200 kWh/mo)	$264 / mo ($3,168/yr)	$352 / mo ($4,224/yr)	$528 / mo ($6,336/yr)	$704 / mo ($8,448/yr)

Electricity Bill Calculation Formulas

Calculates total residential or commercial utility electric bill from volumetric energy consumption, baseline recurring standing charges, and effective tax rates.

FormulaTotal_Bill = [(kWh_Used × Rate_Per_kWh) + Fixed_Charge + (Daily_Standing_Fee × Billing_Days)] × (1 + Tax_Rate)

Variable Definitions

kWh_UsedBilling Period Energy(kWh): Meter reading difference or total kilowatt-hours consumed.
Rate_Per_kWhElectricity Tariff Price(currency/kWh): Volumetric energy rate per kilowatt-hour ($/kWh, €/kWh, £/kWh).
Fixed_ChargeFixed Customer Fee(currency): Base flat connection fee per billing cycle.
Daily_Standing_FeeDaily Standing Charge(currency/day): Per-day grid infrastructure maintenance charge.
Tax_RateSales Tax / Value Added Tax (VAT)(fraction): Local tax percentage applied to subtotal (e.g. 5%–20%).

Engineering Notes & Standards

Annualized run-rate cost = (Total_Bill ÷ Billing_Days) × 365.25.
To model tiered or Time-of-Use (TOU) rates, use weighted average price per kWh across all rate bands.

Frequently Asked Questions (FAQ)

How do I calculate my electric bill from meter readings?

Subtract your previous meter reading from your current meter reading to calculate total kWh consumed during the billing cycle. Then multiply kWh by your electricity rate ($/kWh) and add any fixed standing charges and taxes.

What is a daily standing charge or fixed customer fee?

A fixed customer charge (or daily standing charge) is a baseline flat fee billed by your utility company for grid connection maintenance, meter services, and administration, regardless of how much electricity you consume.

What is the average monthly electricity bill?

In the United States, the average residential monthly electric bill is approximately $140 to $160 (~900 kWh at $0.16/kWh). In the UK and Europe, bills typically average £120 to €150/month.

How can I reduce my monthly electricity bill?

Key strategies include adjusting thermostat setpoints by 1°–2°, shifting heavy loads (laundry, EV charging, dishwashers) to off-peak tariff hours, eliminating phantom standby loads with smart power strips, and upgrading to high-efficiency LED lighting and heat pump water heaters.

Related home energy calculators

Use the Electricity Usage Calculator to estimate appliance-driven consumption. The handoff passes only the entered electricity rate and display currency; it does not invent appliance rows or schedules.