“When I meet with people, sometimes it makes me said to hear some of them saying that they will not go to the polls, but I expect that a good result will be achieved if between 49 and 54 percent (of eligible voters) vote,” he said on the Žinių Radijas radio station on Thursday.
Butkevičius said that his party aimed to win the same number of seats in the parliament as in the previous election.
The Social Democrats are the biggest political group in the outgoing Seimas after winning 38 mandates in the 2012 election.
When asked if he expected to stay as prime minister, Butkevičius said that he would answer this question after the election.
At least 26,348 people, or just over 1 percent of all eligible voters, cast their ballots on the first day of early voting on Wednesday. The voter turnout is very close to that on the first day of early voting four years ago.
Early voting continues on Thursday.