WoodSolutions Carbon Calculator: A Practical Tool For Estimating Carbon Savings From Timber Use

The WoodSolutions Carbon Calculator is a practical tool designed to help construction industry stakeholders, including residential builders, architects, engineers, homeowners, and policy makers, understand the carbon impacts of using timber in building projects. Its core purpose is to quantify the environmental benefits of choosing wood over more carbon-intensive materials. By translating timber use into measurable carbon storage and emissions reductions, the calculator supports informed decision-making and highlights timber’s contribution to reducing the built environment’s carbon footprint.

The calculator incorporates four key elements:

First, for a typical residential project, it estimates the carbon impact associated with a defined volume of timber. A 2021 Forest and Wood Products Australia (FWPA) study shows that a standard home using around 14 m³ of structural timber (Reference 1) captures a substantial amount of carbon.
Second, further research shows that 1 m³ of kiln-dried softwood stores approximately 718 kg of CO₂e, meaning a home using 14 m³ stores 10,052 kg of CO₂e. (Reference 2)
Third, to help communicate these savings in everyday terms, the calculator uses equivalencies based on average carbon offsets from common flights (Climate Active, reference 3). For example:
Melbourne – Sydney: 80 kg CO₂e per one-way flight (~126 flights per home; ~12,565 flights for 100 homes)
Adelaide – Sydney: 110 kg CO₂e per one-way flight (~91 flights per home; ~9,138 flights for 100 homes)
Brisbane – Sydney: 85 kg CO₂e per one-way flight (~118 flights per home; ~11,825 flights for 100 homes)
Hobart – Sydney: 95 kg CO₂e per one-way flight (~106 flights per home; ~10,581 flights for 100 homes)
Fourth, using national plantation growth data, FWPA calculated that Australia’s plantation estate grows enough structural timber for the average house frame in around two-and-a-half minutes. (Reference 4)

Users can scale up scenarios, such as multiple homes, to understand broader carbon benefits.

For example, entering 100 timber-framed houses into the calculator shows a total timber use of 1,400 m³, with 1,005.2 tonnes of CO₂e stored. In many cases, stored carbon may significantly exceed the estimation, resulting in a higher net carbon benefit. This clearly demonstrates how timber construction can support lower overall greenhouse gas emissions.

To make the benefits more relatable, the calculator also provides practical equivalencies. In this scenario, the net carbon benefit of using 14 m³ of timber in each of the 100 homes equates to a carbon offset of approximately 12,565 one-way flights from Melbourne to Sydney. By converting technical carbon data into everyday comparisons, the WoodSolutions Carbon Calculator reinforces why timber is a smart, sustainable choice for modern construction.