Household CO₂

Type kWh, gas, heat, people, grid and PV. 3500, 1200, 40, 3, 350 and 15 give 5,481.3 kg CO₂. 2500, 800, 20, 2, 400 and 0 give 3,620.0 kg CO₂. 4500, 1500, 50, 4, 300 and 25 give 6,562.5 kg CO₂. The total, not a headcount.

The house total. 3500 kWh, 1200 m³ and 40 GJ give 5,481.3 kg CO₂. Not per person.

Input

Parameters

Result

Enter data.

How it works

Household CO₂ in this calculator is the kg CO₂ sum from electricity, gas and heat. 3500 kWh, 1200 m³ gas, 40 GJ, 3 people, grid 350 and PV 15% give 5,481.3 kg CO₂. 2500, 800, 20, 2, 400 and 0 give 3,620.0 kg CO₂. 4500, 1500, 50, 4, 300 and 25 give 6,562.5 kg CO₂.

Grid electricity = kWh × (1 − PV%/100) × g/kWh / 1000. Gas = m³ × 2.0. Heat = GJ × 51. The result is the sum. The per-person line has a dash in the code and does not enter the examples.

5,481.3 kg CO₂ is not a bill. 3,620.0 kg CO₂ does not know a tariff. 6,562.5 kg CO₂ is a larger meter.

Appliance electricity next door sums devices to 1125 kWh/yr. Insulation CO₂ counts U savings. Here the meter stays: 3500, 1200 and 40 stay 5,481.3 kg CO₂.

Type 3500, 1200, 40, 3, 350 and 15, then Calculate. A comma in 15.5 parses. A meter sketch, not the utility.

3500, 1200 and 40 give 5,481.3 kg CO₂. 2500, 800 and 20 give 3,620.0 kg CO₂. 4500, 1500 and 50 give 6,562.5 kg CO₂. Another gas figure at 3500 changes 5,481.3.

Formula

electricity CO₂ = kWh × (1 − PV%/100) × grid / 1000. gas = m³ × 2.0. heat = GJ × 51. total = electricity + gas + heat. Examples take the total, not per person.

How to use

  1. Type 3500 kWh, 1200 m³ gas and 40 GJ heat.
  2. Add 3 people, grid 350 and PV 15%.
  3. Click Calculate. The total is 5,481.3 kg CO₂.
  4. 2500, 800 and 20 give 3,620.0 kg CO₂. 4500, 1500 and 50 give 6,562.5 kg CO₂.
  5. The house total, not the per-person line and not a bill.

3500 / 1200 / 40 = 5,481.3 kg CO₂

The house total. 3500 kWh, 1200 m³ and 40 GJ give 5,481.3 kg CO₂. Not per person.

Household
Electricity, gas and heat. 3500 kWh at 15% PV stays inside 5,481.3 kg CO₂.
CO₂
The total unit. 4500, 1500 and 50 leave 6,562.5 kg CO₂. Not a tariff.
gas
m³ × 2.0. 1200 at 3500 and 40 leaves 5,481.3 kg CO₂. 800 at 2500 leaves 3,620.0.

Examples

Example 1

  • 3500 kWh
  • 1200 m³ gas
  • 40 GJ
  • 3 people
  • grid 350
  • PV 15%

5,481.3 kg CO₂

What household CO₂ from 3500 kWh, 1200 m³ and 40 GJ? 5,481.3 kg CO₂. The total, not a headcount.

Example 2

  • 2500 kWh
  • 800 m³
  • 20 GJ
  • 2 people
  • grid 400
  • PV 0%

3,620.0 kg CO₂

What footprint from 2500, 800 and 20? 3,620.0 kg CO₂.

Example 3

  • 4500 kWh
  • 1500 m³
  • 50 GJ
  • 4 people
  • grid 300
  • PV 25%

6,562.5 kg CO₂

What footprint from 4500, 1500 and 50? 6,562.5 kg CO₂.

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Common questions

What footprint from 3500 kWh, 1200 m³ and 40 GJ?

5,481.3 kg CO₂. Electricity, gas and heat summed, not per person.

How much at 2500, 800 and 20?

3,620.0 kg CO₂. A smaller meter and PV 0.

How much at 4500, 1500 and 50?

6,562.5 kg CO₂. More gas and 25% PV.

Is 5,481.3 kg per person?

No. The examples take the total. The per-person line sits next to it and stays out.

Where do 2.0 and 51 come from?

Constants per m³ of gas and GJ of heat in the code. You do not load them from a tariff.

Does PV change 5,481.3?

Yes. 15% leaves the grid kWh. 0% at 2500 stays inside 3,620.0 kg CO₂.

Does a comma in 15.5 work?

Yes. 3500 and 15.5% PV give a different total than 15.

How is this different from appliances?

That card splits fridge and washer. Here three house meters.

Is this a bill?

No. A result from typed kWh, m³ and GJ. The utility sits outside this calculator.

Knowledge sources

The factors on the page are a sketch. Below are EPA emissions terms, not a national inventory.

Page updated in 2026.