In the New Testament "penny," either alone or in the compound "pennyworth," occurs as the rendering of the Roman denarius . (Matthew 20:2; 22:10; Mark 6:37; 12:15; Luke 20:24; John 6:7; Revelation 6:6) The denarius was the chief Roman silver coin, and was worth about 15 to 17 cents.
Smith’s Bible Dictionary
Penny, Pennyworth
Smith’s Bible Dictionary, William Smith (1863). Public domain, from the CrossWire SWORD module.