roi calculator
ai
shashank · with ai as his sidekick
7 min read · updated apr 29, 2026
enter your marketing spend and revenue — get roi %, roas, cost per acquisition, and annualized return in seconds.
enter your marketing spend and revenue — get roi %, roas, cost per acquisition, and annualized return in seconds.
used to calculate cost per acquisition
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roi = ((revenue − spend) / spend) × 100. a 100% roi means you doubled your money. a 200% roi means you tripled it. negative roi means you lost money.
roas (return on ad spend) = revenue / spend — it shows gross revenue per dollar spent without subtracting costs. roi accounts for profit, making it a truer performance measure.
a common benchmark is 5:1 (400% roi) for marketing channels — meaning $5 revenue for every $1 spent. content marketing and seo often achieve 10:1+ over time due to compounding.
if your campaign ran for less than 12 months, annualized roi projects what you'd earn if that rate continued for a full year. it lets you compare campaigns of different durations fairly.
founder of hold your voice. writes about brand voice, ai writing patterns, and the craft of sounding like yourself.
co-written with ai as sidekick. shashank drafts the voice; the ai pressure-tests the structure. anything that sounds wrong is shashank's fault — anything that sounds suspiciously generic is the ai's.