简单一点说，名义gdp的计算是用已知的基年时的价格水平乘以产品产量，而实际gdp是用当年的价格水平乘以产品的产量得到的

楼上的好象说反了

nominal GDP 是当年的价格和数量的乘积和, RGDP是用基年价格计算的

Real GDP: The aggregate output in the face of total domestic actual products.

Nominal GDP: The aggregate output in the value of money, according to the current exchange rate.

Relation: Real GDP= Sum ( Nominal GDP i/ Price i)

"i" refers to unique category of product