Calculating your click-to-open rate is straightforward once you know the Click-to-Open Rate (CTOR) formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Click-to-Open Rate (CTOR) Calculator.
What is Click-to-Open Rate (CTOR)?
The Click-to-Open Rate (CTOR) calculation tells you your click-to-open rate from a few simple inputs. The figure you are solving for here is the click-to-open rate, expressed in percent.
The Click-to-Open Rate (CTOR) formula
The core formula is:
Click-to-open rate = Unique clicks ÷ Unique opens × 100Here is what each input means:
- Unique clicks — a number. Example: 50.
- Unique opens — a number. Example: 250.
How to calculate it step by step
- Write down the unique clicks (for example, 50).
- Write down the unique opens (for example, 250).
- Apply the formula above to get your click-to-open rate.
- Double-check the result with the Click-to-Open Rate (CTOR) Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Unique clicks | 50 |
| Unique opens | 250 |
| Click-to-open rate | 20.00% |
With unique clicks of 50 and unique opens of 250, the click-to-open rate works out to 20.00%.
Example 2
With unique clicks of 100 and unique opens of 250, the click-to-open rate works out to 40.00%.
| Result | Value |
|---|---|
| Click-to-open rate | 40.00% |
Example 3
With unique clicks of 25 and unique opens of 250, the click-to-open rate works out to 10.00%.
| Result | Value |
|---|---|
| Click-to-open rate | 10.00% |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Click-to-Open Rate (CTOR) Calculator does it instantly, for free, with the formula and a worked example built in.
Related calculators
Continue exploring marketing calculators with these tools: LTV to CAC Ratio Calculator, Conversion Value Calculator, Customer Churn Cost Calculator, Ad Frequency Calculator, Viral Coefficient Calculator.