How much mass does the Sun convert into energy every second due to nuclear fusion?

Answer

Approximately 4 million metric tons

The Sun's shine is due to the conversion of mass into energy via fusion ($E=mc^2$). This process consumes about 4 million metric tons of matter every second, though this is a tiny fraction of the Sun's total mass.

How much mass does the Sun convert into energy every second due to nuclear fusion?
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