"It's awesome, we're so excited," Capitals forward Jakub Vrana said. "It's going to be great to be in a playoff spot again."
Washington (46-24-8), the defending Stanley Cup champion, leads the Metropolitan Division by three points over the New York Islanders.
WATCH: [All Capitals vs. Hurricanes highlights]
"The more you play, the more you realize seeding doesn't matter," Capitals goalie Braden Holtby said. "Your goal is to make the playoffs. We're supposed to make the playoffs; maybe we take it a bit for granted. We've been lucky to have good teams. Every team is close."
Carolina (42-28-7) remained one point ahead of the Columbus Blue Jackets and Montreal Canadiens for the first wild card in the Eastern Conference; Montreal has played one more game.
"It hurts tons, I mean obviously it was a tough loss," Hurricanes coach Rod Brind'Amour said. "The guys are devastated in there, they know what is at stake. I thought they gave everything they had. We will regroup tomorrow and come back at it. If we play like that for the remaining games, we will be in good shape."
Nic Dowd tipped Nick Jensen's shot from the right-side boards at 15:04 of the third to put Washington ahead 3-2 after Vrana took a pass through the neutral zone from Evgeny Kuznetsov and scored five-hole to tie it 2-2 at 1:35.