Cancer belongs to the element of Water and moves through life in the Cardinal mode, ruled by Moon. Leo belongs to the element of Fire and moves in the Fixed mode, ruled by Sun.
Fire evaporates water; water cools fire. On a good day this pair is passion plus tenderness. On a hard day the fire signer feels smothered and the water signer feels burned. Honest pacing is key.
One of you starts, the other builds. This is a productive mix — the cardinal partner launches, the fixed partner sees it through. Resentment only creeps in when the fixed partner feels rushed.
One sign is active, the other receptive — the classic complementary polarity that most astrological literature treats as a natural fit. One of you leads the outward motion, the other holds the inner world.
What follows is a general read on this pair. Real compatibility depends on the whole natal chart — use the calculator linked on this page to compare two full charts when you're ready.