Conversion Rate
The percentage of visitors who complete a desired action — a purchase, sign-up, form fill — out of total visitors.
Full definition
Conversion rate is one of the most important metrics in digital marketing, measuring how effectively your traffic converts into outcomes. Calculated as: (Conversions ÷ Total Visitors) × 100. Conversion rates vary by type: e-commerce purchases average 2–4%, SaaS free trial sign-ups 5–10%, lead generation forms 5–15%. Even small improvements in conversion rate can dramatically impact business outcomes — going from 2% to 3% conversion effectively increases revenue by 50% with the same ad spend. CRO (Conversion Rate Optimisation) uses A/B testing, UX research, heatmaps, and funnel analysis to systematically improve conversion rates across the site.
Real-world example
An insurance broker tests two versions of their quote form — a 12-field version versus a 4-field version. The short form achieves an 11.2% conversion rate versus 4.7% for the long form.
Related terms
A method of comparing two versions of a webpage or ad to determine which performs better.
Read definitionA standalone web page designed with a single focused objective — typically to convert visitors from a specific ad or campaign.
Read definitionA button, link, or instruction that directs users to take a specific desired action.
Read definitionThe average cost spent on advertising to acquire one customer or conversion.
Read definitionReady to apply this to your business?
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