Five concrete examples of the ROI Calculator in real use. Each one shows the situation, what you put in and what comes out, so you can copy the structure, swap in your details and adapt it this week.
Example 1: Comparing two marketing campaigns
The task: Comparing two marketing campaigns. You start from the amount you invested or spent and the amount you gained back.. The tool returns the ROI percentage and the net gain or loss in your chosen currency., giving you a single percentage that makes two very different spends comparable. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 2: Checking profit on a resale
The task: Checking profit on a resale. You start from the amount you invested or spent and the amount you gained back.. The tool returns the ROI percentage and the net gain or loss in your chosen currency., giving you a single percentage that makes two very different spends comparable. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 3: Reviewing spend on new equipment
The task: Reviewing spend on new equipment. You start from the amount you invested or spent and the amount you gained back.. The tool returns the ROI percentage and the net gain or loss in your chosen currency., giving you a single percentage that makes two very different spends comparable. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 4: Ranking projects by efficiency
The task: Ranking projects by efficiency. You start from the amount you invested or spent and the amount you gained back.. The tool returns the ROI percentage and the net gain or loss in your chosen currency., giving you a single percentage that makes two very different spends comparable. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 5: Reporting returns to a partner
The task: Reporting returns to a partner. You start from the amount you invested or spent and the amount you gained back.. The tool returns the ROI percentage and the net gain or loss in your chosen currency., giving you a single percentage that makes two very different spends comparable. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
A Full Worked Example
Input: Cost 800, gain 1000
ROI of 25%, from a net gain of 200 divided by the 800 spent.
The pattern behind every example above: context and constraints go in, structure comes out, and your edit makes it true.
How to Build Your Own Examples
- Take a task already on your calendar for this week.
- Write the brief in two sentences: the job and the audience.
- Generate, compare against the version you would have written manually.
- Save the prompt alongside the result so the second run takes seconds.
Getting More From Each Example
Most people stop at the first result. Generate a second version with one changed variable - length, tone or angle - and compare. The better version usually appears on the second run, not the first.
Frequently Asked Questions
What is the ROI formula?
ROI equals (gain minus cost) divided by cost, multiplied by 100 to give a percentage.
Can ROI be negative?
Yes - when the gain falls below the cost the result is negative, showing a loss.
Does ROI account for time?
No - compare returns over equal periods, or note the timeframe next to the figure.
Is my data stored?
No - calculations run in your browser with nothing saved.
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