NZ Carbon Footprint Calculator
Calculate your annual carbon footprint (tonnes CO2-e) and the NZ ETS offset cost. Tracks car, flights, electricity, gas, and diet against the NZ 17t/yr average.
About this calculator
This calculator implements NZ emission factors (MfE) + ETS spot price from Stats NZ + MfE. Last consulted 18 May 2026. Verify the figures yourself by following the link.
NZ emissions benchmarks
Stats NZ + MfE 2024 data- •NZ per-capita emissions: ~17 t CO₂-e/yr
- •Average personal household: ~7-10 t CO₂-e/yr
- •Paris target (per person): 2 t CO₂-e by 2050
- •NZ ETS spot price 2026: ~$65/tonne NZU
- •Petrol car emission factor: 0.183 kg CO₂/km
- •EV emission factor (NZ grid): 0.026 kg CO₂/km
- •Long-haul flight emission: 0.195 kg CO₂/passenger-km
Source: Ministry for the Environment NZ
Disclaimer
This calculator provides estimates for general information purposes only. Results are based on standard formulas and may not reflect your individual circumstances. Always consult a qualified professional for advice specific to your situation.
How NZ personal carbon footprint is estimated
Sum of emissions from car, flights, electricity, gas, and diet (using NZ Ministry for the Environment factors).
- 1
Car emissions
Car_kg = km × factor (petrol 0.183, diesel 0.171, EV 0.026)
EV very low thanks to mostly-renewable NZ grid.
- 2
Flight emissions
Flights_kg = short × 3000 × 0.255 + long × 18000 × 0.195
Per passenger-km factors.
- 3
Home energy
Energy_kg = kWh × 0.073 + (gas_kWh × 0.21 if gas)
NZ grid factor low; gas factor 3× electricity.
- 4
Diet emissions
Diet_t = 3.5 (heavy meat) / 2.2 (moderate) / 1.4 (light) / 0.7 (vegan)
Annual estimate.
- 5
Total + offset
Total_t = sum_kg ÷ 1000. Offset_cost = total × NZ_ETS_price ($65)
Compare to NZ avg 17t and Paris target 2t.
Worked example
Inputs: 14k km petrol car, 2 short flights, 7500 kWh, moderate diet
Result: Car 2.6t + flights 1.5t + power 0.5t + diet 2.2t = 6.8t. Offset $442/yr.
Frequently Asked Questions
What's the average NZ carbon footprint?
How much does carbon offsetting cost in NZ?
How this calculator works
This nz carbon footprint calculator uses the latest data from official New Zealand government sources to provide accurate results. All calculations are performed in your browser — your data never leaves your device.
All calculations are performed in your browser — your data never leaves your device. Results are for general guidance only and should not be considered professional financial advice.
Built and maintained by Konstantin Iakovlev. Data sourced from the IRD and official New Zealand government sources.
Last reviewed: