Eupanacra perfecta is a moth of the family Sphingidae. It is known from north-eastern India, Bhutan, Myanmar, south-western China, northern Thailand and Vietnam. The wingspan is 56–64 mm. It is similar in colour to Eupanacra metallica. The forewing outer margin is not or only very slightly excavate posterior to the apex. The forewing upperside has postmedian lines which are more longitudinal than in Eupanacra sinuata and run parallel to the outer margin. The first postmedian line is closer to the base on the inner margin. There is a distinct double submarginal line present parallel to the outer margin. The forewing underside is similar to Eupanacra metallica, but the postmedian line is more oblique and abbreviated. There is a pair of more distinct submarginal lines present, the space betwe