Home Utility Cost Calculator

Estimate monthly utilities by home size, or calculate from your bills. Includes electricity, heating, water and internet.

Model: Price/example values: How it is calculated

No bill to hand? Start with the estimate and refine it later.

Estimate US utilities by square footage. Starting values are editable planning assumptions; your own rates and usage make the result more useful.

Estimated monthly budget

$354.18

$4,250.13 per year

Electricity (incl. fixed charge)
$86.83
Gas (incl. fixed charge)
$72.34
Water, trash, internet, phone
$195.00

Annual electricity: base / cooling / heating: 4,000 / 1,000 / 0 kWh.

With 25% less/more energy use: $319.88–$388.47. Scenarios, not a statistical prediction interval.

Adjust rates, included costs and assumptions

Set bills included in rent to 0. Rent, deposits and connection fees are excluded. This is an annual monthly average; seasonal bills can differ substantially. Cooling and space heating are separate. Per-person base use assumes electric hot water; for gas water heating or other fuels, refine with your own usage.

How this estimate works

Base electricity = area × base use per sq ft + people × additional use per person. Useful space heat = area × heat demand per sq ft × heating climate factor × building and insulation factors. Cooling electricity = area × cooling use per sq ft × cooling climate factor × building and insulation factors. These factors do not change base electricity. Gas (therms/year) = useful heat ÷ gas efficiency ÷ 29.307107. Heat pump electricity = useful heat ÷ seasonal COP. Divide annual amounts by 12 for monthly usage.

All energy, climate, building and insulation factors are our planning scenarios, not a statistically calibrated EIA estimation equation or a ZIP-code forecast. EIA RECS provides context on how building characteristics, region and household behavior affect consumption. EIA Residential Energy Consumption Survey.

Your next step:You know your utilities. How do they look per square metre?

The link carries your inputs, so the page reopens with the same result.

A worked example you can check

US example: 1,000 sq ft, 2 people, mixed climate, gas heat. Base electricity: 1,000 × 2 + 2 × 1,000 = 4,000 kWh/year; cooling: 1,000 × 1 = 1,000 kWh/year. Together 416.67 kWh/month for a house with standard insulation. Gas: 10,000 ÷ 0.90 ÷ 29.307107 ÷ 12 = 31.59 therm/month. With the example rates and listed fixed bills: $354.18/month. These are planning assumptions, not a local average.

How it is calculated

Editorial and technical responsibility: Main-Mietservice. Calculation models checked against reference cases; estimates are not individually verified quotes. Sources, review process and corrections

Formula

Exact mode: monthly total = electricity + gas + water + internet + phone + trash + other costs
Energy bills = fixed charge + usage × unit price
Germany estimate: gas = end energy × gas price; heat pump = end energy × 0.90 ÷ 3.2 × electricity price. Electric hot water replaces the corresponding central heat demand.
US estimate: floor area and occupants determine base electricity; area and climate determine useful heat. Editable factors and units are listed beside the result.
Annual cost = monthly cost × 12

Default assumptions

AssumptionValueWhere it comes from
Average days per month30.44 daysDefinition

You can change every default above.

What this calculator does not account for

  • Heating varies strongly by season — the monthly figure is a yearly average, not a January bill.
  • Germany uses published reference values. The US area estimate uses explicit, editable planning assumptions; water and sewer are separate budget entries.
  • Build-year benchmarks are class averages. A refurbished 1960s building uses far less than the figure for "before 1977".
  • Gas quantities can be entered in m³ (Germany), therms (US), or kWh. Quantity and price must use the same unit. Check conversion factors on your bill.
  • Enter heating oil or district heating as other recurring monthly costs in exact mode.
  • Regional grid fees and municipal charges differ considerably.
  • Year-end settlements, whether owed or refunded, are not modelled.

About This Calculator

The Utility Cost Calculator estimates monthly utility expense from your own usage and tariff inputs. It combines electricity, gas, water, internet, phone, and waste to show monthly and annual totals and highlight your largest cost category.

How to Use This Calculator

  1. 1

    Enter monthly usage for electricity (kWh), gas (m³), and water (m³)

  2. 2

    Add your utility rates per unit - find these on recent bills

  3. 3

    Include fixed monthly costs like internet, phone, and waste collection

  4. 4

    See total monthly costs and identify your largest expenses

Why Use This Calculator

Budget Accurately

Know exactly what to expect for monthly utility bills and plan your household budget accordingly with no surprises.

Identify High Costs

See which utilities cost the most and focus energy-saving efforts where they'll have the biggest financial impact.

Track Savings

Monitor changes after implementing energy-saving measures to quantify savings and stay motivated to reduce consumption.

Frequently Asked Questions

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Disclaimer: This calculator provides estimates for planning purposes only. Actual costs may vary based on your circumstances, location, and market conditions. Not financial advice. See our Terms of Service for full disclaimers.