Judas asks why the perfume was not sold for three hundred denarii and the proceeds given to the poor. Whatever his motive, the valuation tells the reader that Mary's gift is extraordinarily costly.
Jesus in Context
Three Hundred Denarii: The Value of the Perfume
The estimate of three hundred denarii for Mary's perfume represents an enormous sum in ordinary labor terms and makes Judas' objection economically plausible on its face.
Introduction
Historical and Cultural Context
A denarius commonly appears in Gospel material as a representative daily wage for a laborer, although actual wages varied. Three hundred denarii therefore evokes roughly a year's working income once Sabbaths and other non-working days are considered, rather than a trivial household purchase. Direct conversion into modern currency is misleading because ancient wages, purchasing power, and social economies differed greatly from ours.
John separately supplies a negative assessment of Judas' motives.
Why It Matters
The scale of the amount is essential to the scene. Without it, Mary's act can sound like an ordinary use of perfume.
The valuation makes the contrast sharp: something worth months of labor is poured out in honor of Jesus. The reader can understand why the expense attracts criticism while still seeing why John presents Mary's act positively.