Dear Sports Fan,
How long is an NBA basketball game? I thought it was an hour long — made up of four fifteen minute quarters — and that I just kept missing the start of the quarter. Now someone tells me it’s four twelve minute quarters. Is that true? Why would a game be forty eight minutes. Seems arbitrary!
Thanks,
Sandra
Dear Sandra,
Rest easy, you were not missing the game! An NBA basketball game is forty eight minutes long and made up of four twelve minute quarters. I suppose you’re right that this seems a little arbitrary because the duration of most of the other big sporting events in the country do seem to end on a “ten.” Football is sixty minutes, made up of four fifteen minute quarters. Hockey is also sixty minutes, although it is divided into three twenty minute periods. Soccer is ninety minutes long, divided into two forty five minute halves. Baseball is essentially timeless — no clock is used to determine when the game ends. NBA basketball seems to be an outlier. Basketball is also the only main sport that differs in how long it is between college and professional games. A college basketball game is forty minutes, divided not into quarters but into two twenty minute halves.
So what gives? According to the original rules of basketball written by James Naismuth, “The time shall be two fifteen-minute halves, with five minutes rest between.” Not to get too far off topic, but the invention of basketball is pretty funny. Naismuth became a phys-ed teacher at a YMCA in Springfield Mass in 1891 and soon after invented basketball. Here is the Wikipedia explanation of why:
At Springfield YMCA, Naismith struggled with a rowdy class which was confined to indoor games throughout the harsh New England winter and thus was perpetually short-tempered. Under orders from Dr. Luther Gulick, head of Springfield YMCA Physical Education, Naismith was given 14 days to create an indoor game that would provide an “athletic distraction”: Gulick demanded that it would not take up much room, could help its track athletes to keep in shapeand explicitly emphasized to “make it fair for all players and not too rough.”
By the time the NBA (then the Basketball Association of America) came into being, the college game with its twenty minute halves was well established. The first franchise owners decided to lengthen the game for their league from forty minutes “so as to bring an evening’s entertainment up to the two-hour period owners felt the ticket buyers expected.” Today, the average “real-time” length of an NBA game has crept up to right under two hours and twenty minutes according to the blog Weak Side Awareness.
As for whether or not all this is arbitrary, I can’t say, but in thinking about this, I did notice that the NBA shot clock — a team must shoot the ball and at least hit the rim before this time expires or else the ball is given to the other team — is 24 seconds; another product of twelve!
Thanks for the question,
Ezra Fischer