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In the title compound, C 13 H 10 O 3 , the pyran­one and benzene rings are almost coplanar, making a dihedral angle of 1.9 (1)°. The cyclo­hexenone ring adopts an envelope conformation, with a methyl­ene C atom located at the flap and displaced by 0.639 (3) Å from the mean plane of the other five atoms. In the crystal, pairs of weak C—H⋯π inter­actions occur between inversion-related mol­ecules.

3,4-Dihydro-1H-benzo[c]chromene-1,6(2H)-dione