The Eurovision Song Contest is well known for its fiendishly complex voting system - here is how it works.
Semi-Finals, Tuesday 10 May and Thursday 12 May
Viewers at home and professional juries each determine the outcome of the two Semi-Finals of the Eurovision Song Contest. In each Semi-Final, 10 contestants qualify for the Grand Final.
Viewers in all countries that are taking part in that particular Semi-Final can vote via the official app, telephone and/or SMS. The voting window opens after the last song has been performed, and ends 15 minutes later. Televoters determine 50% of the outcome;
Professional juries in all countries that are taking part in or were allocated to that particular Semi-Final are required to vote. They also determine 50% of the outcome. The jury, which consists of five members (including a chairperson), is the same jury that will vote in the Grand Final;
The EBU's voting partner Digame mobile GmbH (Digame) will determine the national result by adding up the televoting points from 1 to 8, 10 and 12, and the jury points from 1 to 8, 10 and 12. This means each participating country will award two sets of points;
The ten qualified countries will be announced at the end of each Semi-Final in the order decided by the Executive Supervisor of the Eurovision Song Contest. This order does not reflect the actual ranking on the scoreboard.
Grand Final, Saturday, May 14
Viewers from all participating countries will be invited to vote for their favourite songs on the night of the grand finale on Saturday May 14.
Fans can vote over the phone, by text or via the Eurovision app, available on devices including iOS, Android and Windows.
Each person can vote up to 20 times but voters will be unable to select their own country's entry.
The public votes make up 50% of the total vote, with the other half determined by a professional jury in each participating country.
The experts’ scores are based on the Friday night jury final performances, which are not usually televised.
After viewers have cast their votes, a national spokesperson from the participating countries will be called in to present the points of their professional jury – which range from the maximum "douze points" (12) to zero.
After the presentation of the scores from the juries, the public points from all participating countries will be combined, providing one score for each song.
