Ad Spend ROI Calculator
This ad spend ROI calculator shows how much revenue each dollar or pound of ad spend brings back, then which lever would grow it fastest. Start below.
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See what a 10% gain on each lever does to your ROI.
Pick a monthly revenue target. See what each lever would need to become on its own.
See your lever breakdown and target
Unlock the lever breakdown and revenue plan by email.
Templates That Turn Ad Leads Into Revenue
Ad spend only pays off when leads become signed deals. The faster a proposal or quote follows the first call, the more of those leads you keep. Start from one of these templates and reply the same day.
What Is Ad Spend ROI?
Ad spend ROI shows how much your ads return beyond what they cost. The ad spend ROI formula is revenue from ads minus ad spend, divided by ad spend, multiplied by 100. A result of 200% means every $1 spent brought back $3.
ROAS is a close cousin. It divides revenue by spend without subtracting the cost, so a 200% ROI equals a ROAS of 3. Both tell you whether ads are paying their way.
How to Use the Ad Spend ROI Calculator
Three steps and under a minute.
Pull four numbers
Take spend, leads, conversion and deal value from the same month and the same campaigns.
Enter them in the calculator
Slide each input to your figure. ROI, revenue and cost per customer recalculate straight away.
Find your best lever
Unlock the lever breakdown to see which change would lift ROI most, and what it takes to hit your revenue target.
How to Calculate Ad Spend ROI: The Four Inputs
Most errors come from counting leads or revenue from the wrong campaigns.
- Monthly ad spendTotal paid media spend, including platform fees. Leave out agency fees unless you want them in the ROI.
- Leads from adsLeads from paid campaigns only. Remove duplicates and obvious spam before you count.
- Lead to customer rateCustomers won divided by ad leads, over a period long enough for deals to close.
- Average deal valueFirst-year revenue per new customer after discounts. Use the median if a few deals were unusually large.
An Ad Spend ROI Example
A team spends $10,000 a month and gets 200 leads. At a 5% lead to customer rate, that is 10 customers worth $3,000 each, or $30,000 in revenue.
That is a 200% ROI, or a ROAS of 3. Lift conversion by 10% and ROI rises to 230%, with no extra spend. Conversion is often the cheapest lever to pull.
Which ROI Lever to Pull First
On paper the four levers move ROI by similar amounts. In practice, two are far cheaper to move.
More leads
Needs new audiences, creative or channels, and each test takes weeks of spend to read clearly.
Lower spend
Cutting budget can lift ROI on paper while shrinking the revenue you need.
Higher conversion
Shaped by how fast leads hear back and how strong the first proposal is.
Bigger deals
Comes from clear pricing options and proposals that show the value. That is why marketing teams and sales start here.
How to Turn More Leads Into Customers
Ad leads rarely go cold because of the ad. They go cold while waiting for a reply.
Reply within the hour
Interest is highest when the form is submitted. A fast, personal reply turns more ad leads into first calls than any later follow-up.
Send a proposal after the first call
Momentum fades in the gap after the call. A library of services and pricing makes same-day proposals realistic.
Match the proposal to the ad
Use the same promise the lead clicked on, then send it with a clear proposal email.
How to Lower Your Cost per Customer
Cost per customer falls when fewer good leads slip away after the first call.
Qualify on the first call
Ask about budget, timeline and authority on the first call. Proposals sent to unqualified leads waste time that could go to buyers ready to sign.
Follow up on buying signals
A lead who opens your proposal twice is telling you something. Learn to spot buying signals in sales.
Close the loop with marketing
Share which campaigns produced customers, not just leads, so budget moves to what actually sells.
Common Ad ROI Mistakes
Five habits that make ad ROI look wrong.
Both teams should agree on these numbers. Start with sales and marketing alignment.
Faster Documents, Better Ad ROI
Once the ad spend ROI calculator shows where returns leak, follow the lead after the form is filled. Many go cold while a proposal is drafted, formatted and chased. Proposal.biz removes most of that wait.
- Proposals from one promptPaste your website URL once. Proposal.biz saves your services and pricing, so a proposal for a new lead takes minutes, not days.
- Know which leads are warmDocument analytics reveal which leads opened your proposal and how far they read.
- Quote, sign and get paidClients approve the quote and pay in the same place. Use it to create and send quotes.
Frequently Asked Questions
Straight answers on measuring return from paid ads
Turn More Ad Leads Into Signed Deals
Run the ad spend ROI calculator each month, then reply faster, send proposals sooner and follow up when leads are reading.