QMC@Home was a volunteer computing project for the BOINC client aimed at further developing and testing Quantum Monte Carlo (QMC) for use in quantum chemistry.

QMC@Home allows volunteers from around the world to donate idle computer cycles to help calculate molecular geometry using Diffusion Monte Carlo.

As of February 2010[update], QMC@Home has about 7,500 active participants from 102 countries, contributing about 5 teraFLOPS of computation power.

[2] In order to get results from home computers the work is split into "workunits".

The time it takes to complete a workunit depends on the size of the calculated system and the speed of the user's computer.