CM CalcMentor Calculators that explain the answer.

Marketing calculator

CPM Calculator

Calculate cost per thousand impressions and add click-through context when clicks are known.

What CPM measures

CPM is the cost of 1,000 ad impressions. It is often useful for reach and awareness planning, but it should be read with click-through and conversion metrics when performance matters.

Example

If an ad campaign costs $500 and receives 100,000 impressions, CPM is $500 / 100,000 x 1,000 = $5.00.

Common mistakes

Low CPM does not automatically mean good performance. Check audience quality, frequency, click-through rate and conversions before increasing spend.

References

Last reviewed: 2026-05-17

Before relying on this result

Use this calculator together with the formula, assumptions, limitations and examples on the page. If the topic involves health, tax, lending, investment, legal, safety or current-rate decisions, treat the number as an estimate and check the relevant primary source or professional guidance.

Calculator metadata last reviewed: 2026-05-14.