Vapour pressures above solutions of glucose (Glc) in water and maltose in water at both 298.06 and 317.99 K have been measured. Vapour pressures above aqueous solutions of maltotriose, maltotetraose and maltopentaose at 317.99 K have also been measured. The experimental results are compared with predictions from two existing UNIFAC type models available in the literature. Further to this a theoretical model is examined in which existing interaction parameters, calculated for the 1.2-ethanediol/water system using a molecular mechanical approach, are incorporated into the UNIQUAC equation to describe the vapour pressures of the aforementioned series of alpha-(1-4) linked Glc oligosaccharides in aqueous solution. This so-called transference principal is found to be adequate for these systems when used in conjunction with an adjustment to the coordination number used for the lattice based model.