A table top extension and method for increasing the table top surface area of an existing table. The table top extension includes at least first and second planar panel sections each having a first, inner peripheral edge and a second, outer peripheral edge. The first, inner peripheral edges include interlocking tongue and groove structure such that the first, inner peripheral edges can be locked together to form the table top extension having a combined table top area defined by at least the first and second planar panel sections. The second, outer peripheral edges of the first and second planar panel sections align to form an outer peripheral edge of the table top extension when the first and second panel sections are locked together with the interlocking tongue and groove structure. The table top extension is configured as a planar panel including at least the first and second planar panel sections, and may be placed on the existing table to increase the table top surface area by placement of the outer peripheral edge of the table top extension radially outside of an outer peripheral edge of the existing table, relative to a center point of the table.