Abstract: Example implementations relate to digital space allocation determinations. In an example, an availability query for digital space during a predetermined period is received. The availability query includes a set of dimensions. Responsive to receiving the availability query, at least one base query is generated for at least a subset of dimensions of the set of dimensions, a respective quantity of available digital space during the predetermined period is determined for the at least one base query, average demand for digital space for a unit of time is obtained by executing the availability query on historical data, and a quantity of available digital space during the predetermined period is determined based on the average demand for digital space for the unit of time and the respective quantity of available digital space for the at least one base query.