Webinar calculator.

Plan your numbers before launch. Find the biggest opportunity after your webinar.

Webinar name

Event date (optional)

Loading saved workspace…

Build your financial model

Adjust the assumptions below. Your projected return updates as you go.

Traffic

Ad spend

Budget for this webinar

Cost per registration

Expected cost to acquire one registration

Conversion assumptions

Webinar show rate

Attendees ÷ registrations

Retention rate

Attendees retained to the pitch ÷ webinar attendees

Call booking rate

Booked calls ÷ retained attendees

Call show rate

Attended calls ÷ booked calls

Close rate

Customers ÷ attended calls

Offer values · USD

Upfront cash per sale

Average payment received at purchase

Contract value per sale

Average full sale value, including installments

Starting values are editable examples.

Cash ROAS

Projected

3.4×

$3.40 in upfront cash per $1 of ad spend.

Contract Value ROAS

5.1×

Cost per acquisition

$1,176.47

Your webinar funnel

Assumed rates

Cost per registration$15.00Per registrant1,333 registrations

Webinar show rate30%Of registrations399 attendees

Retention rate70%Of webinar attendees279 retained to pitch

Call booking rate30%Of retained attendees83 booked calls

Call show rate70%Of booked calls58 attended calls

Close rate30%Of attended calls17 customers

Upfront cash collected$68,000.00

Total contract value$102,000.00

Each projected people count is rounded down before calculating the next stage. ROAS measures return on ad spend, before other business costs. Contract value includes payments that may not yet be collected.

Compare scenarios

Save a baseline, change your assumptions, and see the difference.

No saved scenarios yet. Save your current numbers to compare them with another projection. Up to eight scenarios are included in your CSV.

How the calculations and CSV work

Registrations = ad spend ÷ cost per registration. Multiply by webinar show rate, retention rate, call booking rate, call show rate, and close rate to project customers. Round down registrations and each subsequent people count before calculating the next stage. Display other figures to two decimal places. Cash ROAS = customers × upfront cash per sale ÷ ad spend. Contract Value ROAS uses the full contract value per sale. CPA = ad spend ÷ customers.

Retention rate = attendees retained to the pitch ÷ webinar attendees. Call booking rate = booked calls ÷ retained attendees. Actual analysis uses your counts directly. Targets change one metric at a time. Lower registration cost means more registrations at the same spend; higher conversion rates mean more people progressing through the funnel. Rates at or above target, and registration costs at or below target, are not downgraded.

Use unique people at each stage and a consistent set of results from one webinar. If people booked or bought through a different path, this simple sequence may not describe those conversions. Enter zero for a measured zero; leave missing values blank.

Calculations run in your browser and autosave on this device. Clearing browser storage removes that saved work. Export a CSV to keep a portable copy, share it with your team, or upload it to an AI tool of your choice. CSV results use whole people and two decimals for other figures. Input rows retain their original precision so importing your CSV restores the same calculations. Importing replaces the current workspace and recalculates all results.