Ten Auckland schools piloted a school carbon calculator between June and November 2021. The pilot aimed to build knowledge about: (1) how schools can use a School Carbon Footprint calculator to understand their school's carbon emissions, build knowledge about climate change mitigation, and take steps to reduce their school's carbon footprint; and (2) what support, advice, and resources schools need to enable them to make effective use of a School Carbon Footprint calculator. A free online calculator was used, with light-touch guidance and support from Auckland Council's Sustainable Schools team. A key driver for the Sustainable Schools team was to see how a carbon footprinting tool and approach could support student engagement in the process, linking carbon footprinting to teaching and learning, and empowering student-led action. The pilot began in late June 2021 with an online workshop to introduce participating school staff to the carbon calculator and the aims of the pilot, followed by in-person school visits from the Sustainable Schools team. A planned cluster meeting with all the pilot schools in August had to be cancelled due to COVID-19 lockdown. The next few months of the pilot were challenged by sustained lockdown. A few schools dropped out, but the pilot continued with schools that were willing. Data were collected at the beginning and end of the pilot through surveys and interviews with participating school staff and the Sustainable Schools team. The findings of this pilot suggest there is interest and appetite within schools to do carbon footprinting to support student learning and action-taking. However, some schools were more ready than others to connect a carbon calculator to their existing school-wide practices or classroom curriculum. [This report was prepared for Auckland Council.]