Flow, process and networks
Conversion-rate trend chart
Shows how the proportion reaching an outcome changes over time.
- Chart
- Conversion
- Trend over time
What it answers
Is conversion improving over time?
- Shape
- Rate lines across periods
- What it shows
- Conversion changes and volatility.
Example
The question
Is the share of visitors who buy rising or falling?
Conversion rates by month, 2025 (%)
Illustrative data. It belongs to no company.
When to use it
Use it when
Comparing consistent conversion definitions across periods.
Avoid it when
Changing eligibility, attribution or tiny denominators.
How to read it
Read the rate trend and check the counts behind each point.
Note
Use consistent converted and eligible populations.
The data you need
- Layout
- Long table
- Fields
- Period: date/text; EligibleCount: integer; ConvertedCount: integer
- One row is
- One period and the counts defining its conversion rate. What is the grain?
- Rules
- Require 0 <= ConvertedCount <= EligibleCount. Define eligibility, attribution and conversion window.
- Optional
- Alternative Rate with denominator and documented calculation.
- Preparation
- Calculate converted/eligible counts for each comparable period; preserve both numerator and denominator.
- Units
- Converted/Eligible entities per period. Distinguish percentage-point changes fromrelative percentage changes.
Worked example
Jan 50/1000=5%; Feb 72/1200=6%. Improvement is 1 percentage point or 20% relative, not 1%.
| Period | EligibleCount | ConvertedCount |
|---|---|---|
| 2026-01 | 1000 | 50 |
| 2026-02 | 1200 | 72 |
