So far, we discussed the methods of computing the index numbers for a number of years at a time. Now, we shall discuss the various methods of computing an index number for a particular period on the basis of a given base period. For this, we have several methods before us which can be shown in the form of a chart as under:

Thus, in toto, we have eleven different methods of computing an index number which are as follows:

- Simple aggregative method
- Simple relative method
- General weighted aggregative method
- Weighted aggregative method of Laspeyre
- Weighted aggregative method of Paasche
- Weighted aggregative method of Fisher
- Weighted aggregative method of Drobish and Bowley
- Weighted aggregative method of Marshall and Edge worth
- Weighted aggregative method of Walsch
- Weighted aggregative method of Kelley, and
- Weighted relative method