Growth
Change in share, in points
Quoting the change in percentage points avoids the ambiguity of a percent of a percent.
The Formula
Points = (S_now - S_before) x 100
Quoting the change in percentage points avoids the ambiguity of a percent of a percent.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| S1 | Current share | fraction | Your share in the latest period. |
| S0 | Earlier share | fraction | Your share in the comparison period. |
What Each Symbol Means
S1fraction
Current share
Your share in the latest period.
S0fraction
Earlier share
Your share in the comparison period.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate market share page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Market Share, filed under Business. Every number the guide produces comes from substituting into this one line.