Home › Business › CPC, CPM & CTR Calculator
FREE · NO SIGN-UP · TRANSPARENT FORMULAS

CPC, CPM & CTR Calculator

Calculate campaign unit costs and click-through rate, or solve spend and expected clicks in reverse.

Your numbers

Make it your own
Updates as you type
Click-through rate
2%

Calculated from your inputs · rounded for display

Cost per click$0.25
Cost per 1,000 impressions$5.00

Enter matching campaign scope and period. These metrics do not establish conversions, profit, viewability or attribution quality.

Your calculation, step by step

No black boxes
  1. CTR = 2000 / 100000 × 100.
  2. CPM = 500 / 100000 × 1,000.

What if things were different?

Save up to three scenarios, then change your inputs to compare the possibilities.

How to use this calculator

  1. Enter your own values in the labeled fields. Check the units and assumptions before comparing results. Only the fields needed for your selected calculation mode are shown.
  2. Your answer updates automatically. Review the calculation steps to see exactly how it was calculated.
  3. Copy, share, save, or download your result. Saved inputs stay on this device.

How the calculation works

CPC=spend/clicks; CPM=1000 × spend/impressions; CTR=100 × clicks/impressions

Use consistent campaign dates, currency and scope. Zero clicks leave CPC undefined, while CTR can still be zero. Reverse modes estimate spend or expected clicks from your chosen unit metric, without implying conversions or profitability. Review the units, period and assumptions before comparing scenarios. Displayed values are rounded, while the underlying calculation retains its available precision.

A worked example

$500 spend, 100,000 impressions and 2,000 clicks give $0.25 CPC, $5 CPM and 2% CTR.

Reading your result

Use the main result together with its units and supporting figures. Display values are rounded; calculations keep their underlying precision. A change in inputs or assumptions can change the answer. Compare the step-by-step working with your intended use before relying on an estimate.

Frequently asked questions

What assumptions does this calculation use?

Use consistent campaign dates, currency and scope. Zero clicks leave CPC undefined, while CTR can still be zero. Reverse modes estimate spend or expected clicks from your chosen unit metric, without implying conversions or profitability.

Can I save or check a scenario?

The result includes the working and supporting values. Save and Restore keep inputs on this device; Copy, Download and Print export the result. Sharing a scenario explicitly includes the inputs in its link.

Sources & methodology

This calculator uses the mathematical identity and assumptions stated above. No current rates, prices, or external data are loaded. Conversion tools use international unit definitions.

Formula review: October 24, 2026. Read our methodology.