HempcreteHub Carbon Tracker
Every hempcrete wall sequesters CO₂. Here's what our community has locked away so far.
15,899 kg
CO₂ sequestered
16
London–NYC flights avoided
3
Projects submitted
1
Countries represented
What this means
795
trees
worth of annual CO₂ absorption — the equivalent number of mature trees absorbing carbon for a year
16
flights
London to New York return — CO₂ locked into walls instead of released into the atmosphere
37
barrels of oil
equivalent in carbon emissions avoided by choosing hempcrete over conventional building materials
4,543
beef burgers
The carbon footprint of that many quarter-pound beef burgers — one of the most emissions-intensive foods on the planet
75,711
miles driven
The equivalent CO₂ produced by an average petrol car travelling that distance
22,083
bricks worth of CO₂
Stacked up, that's 1.7km high — taller than Burj Khalifa (828m). Locked into hempcrete walls instead of fired in a kiln.
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How we calculate this↓
CO₂ sequestration formula
CO₂ (kg) = wall area (m²) × wall thickness (m) × 110 kg/m³
The 110 kg/m³ figure is Lime Technology's published figure for sprayed hempcrete (Tradical® Hemcrete® system). Hand-placed and shuttered hempcrete sequesters approximately 165 kg/m³. Source: The Hempcrete Book (Stanwix & Sparrow) and Ip & Miller (2012) Life Cycle Assessment.
Equivalents sources
- Miles driven: based on 0.21 kg CO₂ per mile for an average petrol car. Source: DESNZ Conversion Factors
- Beef burgers: a standard quarter-pound beef burger produces approximately 3.5 kg CO₂e. Source: Poore & Nemecek (2018)
- Bricks: a standard UK clay brick weighs approximately 3 kg and has an embodied carbon of ~0.24 kg CO₂/kg, giving 0.72 kg CO₂ per brick. Source: Lucideon (2013)
- Trees: one mature tree absorbs approximately 20 kg CO₂ per year. Source: Carbon Brief
- Flights: one economy return flight London–New York produces approximately 1,000 kg CO₂e per passenger. Source: Our World in Data
- Barrels of oil: burning one barrel of oil produces approximately 430 kg CO₂. Source: US EIA
Data updates hourly. CO₂ calculated at 110 kg per m³ of hempcrete.
Last updated: 11/07/2026
Build: SET_HOSTINGER_GIT_SHA_IN_PANEL · 2026-07-11T18:26:12.387Z