Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Cost per engagement
$0.391
Effective CPM
$11.90
Cost per click
$1.39
Engagement rate on impressions
3.05%
Click-through rate
0.86%
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter total spend ($).
- 2Enter engagements delivered.
- 3Enter impressions delivered.
- 4Enter link clicks.
- 5Read your cost per engagement on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
CPE is the fastest way to compare a $500 nano creator against a $12,000 macro deal. Low CPE with a weak comment ratio usually means bought engagement, so read both numbers together.
Worked example
Using the values the calculator loads with:
Inputs
- Total spend: 2500 $
- Engagements delivered: 6400
- Impressions delivered: 210000
- Link clicks: 1800
Results
- Cost per engagement: $0.391
- Effective CPM: $11.90
- Cost per click: $1.39
- Engagement rate on impressions: 3.05%
- Click-through rate: 0.86%
What each field means
Inputs
- Total spend ($)
- The total spend used in the calculation, measured in $. Starts at 2500 $ so you have a working example on load.
- Engagements delivered
- The engagements delivered used in the calculation. Starts at 6400 so you have a working example on load.
- Impressions delivered
- The impressions delivered used in the calculation. Starts at 210000 so you have a working example on load.
- Link clicks
- The link clicks used in the calculation. Starts at 1800 so you have a working example on load.
Results
- Cost per engagement
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Effective CPM
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Cost per click
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Engagement rate on impressions
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Click-through rate
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the cost per engagement (cpe) calculator work?
CPE is the fastest way to compare a $500 nano creator against a $12,000 macro deal. Low CPE with a weak comment ratio usually means bought engagement, so read both numbers together. The underlying maths is: CPE = Spend ÷ Total engagements.
What do I need to enter?
4 values: total spend, engagements delivered, impressions delivered, and link clicks. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the cost per engagement result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Cost Per Engagement Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/cost-per-engagement
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/cost-per-engagement" target="_blank" rel="noopener">Cost Per Engagement Calculator — RevenueLab</a> (2026).</p>
Source: [Cost Per Engagement Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/cost-per-engagement) (2026).