SellMath / Advertising
CPM Calculator
Calculate advertising cost per thousand impressions.
Your estimate
- Cost per thousand impressions
Calculated in your browser. Your entries are not sent anywhere.
How the calculation works
CPM = ad spend ÷ impressions × 1,000
A dash means the ratio is undefined or the target cannot be reached.
Frequently asked questions
What is an impression?
An impression is an ad display, not necessarily a unique viewer or a click. Use spend and impressions from the same reporting period.
What if impressions are zero?
CPM is undefined when impressions are zero; the calculator shows a dash.
Related calculators
Stripe Fee Calculator
Calculate Stripe US card fees, net payout, and the price needed to receive your target amount.
Open calculator ↗PayPal Fee Calculator
Estimate PayPal US fees by payment type, compare platforms, and reverse-calculate your selling price.
Open calculator ↗eBay Fee Calculator
Estimate eBay US final value fees across both sale tiers, including small-order fees and reverse pricing.
Open calculator ↗Etsy Fee Calculator
Estimate Etsy US listing, transaction and payment fees, then find a selling price that meets your profit target.
Open calculator ↗Depop Fee Calculator
Estimate Depop US seller processing fees and compare your payout with other marketplaces.
Open calculator ↗Mercari US Fee Calculator
Estimate Mercari US seller fees, profit after shipping and costs, and your required listing price.
Open calculator ↗Poshmark Fee Calculator
Calculate Poshmark US fees above and below its price threshold and find your target listing price.
Open calculator ↗Mercari Japan Fee Calculator
Estimate Mercari Japan selling fees in yen, select a shipping method, and reverse-calculate a listing price.
Open calculator ↗Markup and Margin Calculator
Calculate markup, gross margin and gross profit from your item cost and selling price.
Open calculator ↗ROI Calculator
Calculate return on investment from total proceeds and the initial investment cost.
Open calculator ↗ROAS Calculator
Calculate return on ad spend as a multiple and a percentage from attributed revenue and advertising spend.
Open calculator ↗CPC Calculator
Calculate your average cost per click from advertising spend and clicks.
Open calculator ↗CTR Calculator
Calculate click-through rate from clicks and impressions.
Open calculator ↗Break-even ROAS Calculator
Find the ROAS and acquisition cost needed to break even after product costs, shipping and selling fees.
Open calculator ↗PayPal Goods and Services Fee Calculator
Calculate US PayPal G&S seller fees and reverse the price to ask for your desired net payment.
Open calculator ↗PayPal Friends and Family Fee Calculator
Estimate US PayPal personal transfer fees by funding source, international minimum and cap, and an optional currency spread.
Open calculator ↗PayPal Invoice Fee Calculator
Calculate US PayPal invoice fees by payment method, including capped ACH, and invoice enough to meet your net target.
Open calculator ↗PayPal Fee Calculator UK (GBP)
Estimate UK PayPal commercial fees in GBP, select the sender market, and reverse-calculate a target payout.
Open calculator ↗PayPal Fee Calculator Australia (AUD)
Estimate Australia PayPal commercial fees in AUD, select the sender market, and reverse-calculate a target payout.
Open calculator ↗PayPal Fee Calculator Canada (CAD)
Estimate Canada PayPal commercial fees in CAD, select the sender market, and reverse-calculate a target payout.
Open calculator ↗eBay Profit Calculator — Costs, Ads, Margin & ROI
Calculate eBay US profit after item, shipping, packaging and advertising costs, or find a price for your target profit.
Open calculator ↗eBay UK Fee Calculator — Private & Business
Estimate eBay.co.uk private or business fees in GBP, including international private sales and an editable category rate.
Open calculator ↗Platform comparisons
eBay vs Etsy Fees
Compare eBay and Etsy fees at the same selling price and find the price needed to reach a target payout.
Open calculator ↗Depop vs Poshmark Fees
Compare Depop US and Poshmark US selling fees, payouts and target listing prices.
Open calculator ↗Mercari vs Poshmark Fees
Compare Mercari US and Poshmark US fees for a sale and reverse-calculate the price needed for your target.
Open calculator ↗フリマアプリ手数料比較：メルカリ・ラクマ・ヤフオク
メルカリ・楽天ラクマ・ヤフオクの販売手数料、受取額、利益を同じ条件で比較。各サービスの必要販売価格も逆算します。
計算ツールを開く ↗