MOSCOW, July 2 (Reuters) - Damper payments, a form of subsidy to oil refineries, are set to decline by around 4.5% to 150 billion roubles in Russia in June from May due to global gasoline price rises and a weaker rouble, Reuters calculations showed on Tuesday.

The decline in subsidies is advantageous for the state budget.

The damper is a payment to refineries to encourage them to sell their product on the domestic market instead of exporting it at a higher price.

Reuters calculations take into account domestic supplies of gasoline and diesel on the domestic market in June of 2.1 million metric tons and 4.9 million tons respectively.

The calculations showed that the damper payments for gasoline declined in June from May by around 16% to 21,865 roubles per tone, while the subsidies for diesel grew by 2.6% to 16,595 roubles.

The damper payments to oil refineries for the first half of the year are set to rise to 1 trillion roubles from 600,000 billion roubles in the same period in 2023.

(Reporting by Reuters; editing by David Evans)