By MoneyBees
Work out your household's carbon emissions from electricity, town gas and driving with Singapore's official factors: EMA's grid emission factor and NEA's town gas factor, compared with the average home of your type and priced at the S$45 carbon tax.
Fills in the 2024 average for your home type.
On your SP bill.
0 if you cook with electricity.
Your model's figure in its VES listing.
Your footprint a year
1.99 t CO2
166 kg a month
Home vs average
+0 kg
a month, vs a HDB 4-room
At S$45 a tonne
S$89
a year, the 2026 carbon tax rate
Your 380.7 kWh of electricity a month comes to 153 kg of CO2 at EMA's 2024 grid factor of 0.402 kg per kWh. Town gas adds 13 kg.
An average HDB 4-room used 380.7 kWh of electricity and 62.6 kWh of town gas a month in 2024, about 166 kg of CO2. Your home is at or below that.
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| Home | Electricity kWh a month | Town gas kWh a month | CO2 a month |
|---|---|---|---|
| HDB 1 or 2-room | 175.7 | 36.4 | 78 kg |
| HDB 3-room | 276.1 | 51.1 | 121 kg |
| HDB 4-room | 380.7 | 62.6 | 166 kg |
| HDB 5-room or Executive | 464 | 69.8 | 201 kg |
| Private apartment or condo | 522 | 85.9 | 227 kg |
| Landed property | 1,208.2 | 133.5 | 512 kg |
EMA averages per household account. CO2 at 0.402 kg per kWh of electricity and 0.201 kg per kWh of town gas.
EMA's grid emission factor is the average CO2 from all power plants for each unit of electricity they generate: 0.402 kg per kWh in 2024, down from 0.412 in 2023. NEA's factor for town gas is 55.73 kg of CO2 per GJ, which is 0.201 kg per kWh. No official agency publishes an emission factor per cubic metre of tap water, or per passenger-km for MRT, bus or car, so water and public transport are not counted. LTA says rail cuts carbon by nearly 90% and electric buses by up to 70% compared with petrol and diesel cars.
An average 4-room HDB flat used 380.7 kWh of electricity and 62.6 kWh of town gas a month in 2024. That is 153 kg of CO2 from electricity and 13 kg from gas: 166 kg a month, or 1.99 tonnes a year. At the S$45 carbon tax rate, that is worth about S$89 a year. NCCS estimates the rise to S$45 adds about S$3 a month to an average 4-room flat's utility bills.
Figures checked 3 Oct 2026.
0.402 kg of CO2 per kWh of electricity in 2024, down from 0.412 in 2023, according to EMA's Singapore Energy Statistics. It is the average across all power plants serving the grid.
It depends on the home. In 2024 an average 4-room HDB flat used 380.7 kWh a month, about 153 kg of CO2. A 3-room flat used 276.1 kWh, about 111 kg, and a landed home 1,208.2 kWh, about 486 kg.
S$45 per tonne of CO2-equivalent from 1 Jan 2026, for 2026 and 2027, with a view to S$50 to S$80 by 2030. It is levied on facilities that directly emit at least 25,000 tonnes a year, such as power plants, and reaches households through prices like electricity tariffs.
NCCS estimates the rise to S$45 a tonne adds about S$3 a month to the utility bills of an average 4-room HDB flat, holding other tariff components constant.
No Singapore agency publishes an emission factor per cubic metre of tap water or per passenger-km for MRT and buses, and this calculator uses official factors only. LTA says rail emits nearly 90% less carbon than petrol and diesel cars.
Enter the kilometres you drive a month and your model's CO2 per km, as listed under LTA's Vehicular Emissions Scheme. For an electric car charged away from home, enter the kWh you charge; charging at home is already on your electricity bill.
NEA's factor for town gas is 55.73 kg of CO2 per GJ, about 0.2 kg per kWh of gas on your bill. An average 4-room flat used 62.6 kWh of town gas a month in 2024, about 13 kg of CO2.
These calculators provide general estimates for educational purposes only and are not personalised financial advice. Results may rely on rates and rules that change over time, so verify against official sources (IRAS, CPF Board, HDB, MAS) or consult a licensed financial adviser before making decisions.
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