Online Course Audience Conversion Calculator

1. Choose the audience definition

Select a denominator that represents people who could reasonably encounter the offer, then use that same definition for future comparisons.

2. Enter reachable audience

Use unique people rather than impressions. For email, delivered recipients are usually more informative than the full list size.

3. Enter completed buyers

Count completed enrollments attributable to the same campaign and time window.

4. Check attribution and timing

Do not combine buyers from a longer period with an audience count from a shorter period.

5. Review the percentage and ratios

Use the main rate with buyers per 1,000 and the audience-to-buyer ratio for easier interpretation.

Audience conversion rate = (Students ÷ Reachable audience) × 100
Buyers per 1,000 reached = (Students ÷ Reachable audience) × 1,000

Both values require buyer and audience counts from the same campaign, source, and attribution window. The calculator does not determine causality or remove duplicate people across channels.

What the result means

The percentage indicates how many people in the defined audience completed a online course purchase.

A rate above 100% signals that the buyer count exceeds the audience denominator, usually because of mismatched definitions, repeat purchases, or attribution overlap.

Given: A reachable audience of 48,000 people and 612 completed enrollments.

Calculation: Conversion rate = (612 ÷ 48,000) × 100 = 1.27%. Buyers per 1,000 reached = (612 ÷ 48,000) × 1,000 = 12.75.

Result: About 1.27% of the defined audience converted, equivalent to roughly 12.8 buyers per 1,000 people reached.