Earth from space at night

How to Calculate Your Carbon Footprint (2026 Guide)

By Sustainability Awakening • Dr. Ahmad Mahmood
1. Basic Formula

Activity Data × Factor

Multiply kWh, liters, or miles by EPA or DEFRA CO2e factors.
2. Home Electricity

US Grid: ~0.37 kg CO2e/kWh

A 10,000 kWh/yr home emits ~3.7 tonnes CO2e before solar.
3. Cars & Commuting

Gasoline: 2.31 kg CO2/Liter

Switching from gas to an EV cuts driving emissions by 60–75%.
4. Home Heating

Heat Pumps Beat Furnaces

Electric heat pumps run 3× more efficiently than gas boilers.
5. Flights & Travel

~90–150 g CO2e per km

One round-trip transatlantic flight adds ~1.6 tonnes CO2e.
6. Food & Diet

Plant-Rich Meals Cut CO2e

Cutting food waste and beef lowers diet footprints by 30–50%.
7. Business Scopes

Scope 1, 2 & 3 Inventory

Track fuel (S1), grid power (S2), and supply chain (S3).
8. Global Benchmarks

US ~14 t vs World ~4.7 t

The 2030 climate target is ~2.5 tonnes CO2e per person/yr.
9. Real Abatement

Cut First, Then Remove

Prioritize efficiency and solar before buying carbon credits.
Free Calculator

Calculate Your Footprint

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