Webinar Cost Per SQL Calculator — Rex's Toolbox

Rex says

Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.

Try a scenario

Click to load — tweak from there.

Inputs

Registrations

Live show-up rate(%)

Attendee to MQL rate(%)

MQL to SQL acceptance rate(%)

Total fully loaded program cost($)

Average closed-won deal size($)

SQL to closed-won rate(%)

Result

Cost per SQL

$259

SQLs generated

54.0

Cost per MQL

$78

Expected closed-won deals

9.72

Program ROI from expected closed revenue

1150%

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How to use this

1Enter registrations.
2Enter live show-up rate (%).
3Enter attendee to mql rate (%).
4Enter mql to sql acceptance rate (%).
5Enter total fully loaded program cost ($).
6Enter average closed-won deal size ($).
7Enter sql to closed-won rate (%).
8Read your cost per sql on the right — it updates as you type.
9Hit Share to keep the scenario or send it to someone.

About this calculator

Webinar programs get judged on registration counts far too often, when the number that actually matters to a B2B pipeline is cost per sales-qualified lead (SQL) — a lead sales has accepted as worth working, not just someone who filled out a form or showed up live. This calculator walks the full funnel: registrations to live attendees, attendees to marketing-qualified leads (MQLs) based on engagement or fit criteria, and MQLs to SQLs based on your sales team's acceptance rate, then divides total program cost by resulting SQLs. It's common for a webinar with an impressive 2,000 registrations to produce fewer than 15 SQLs once you apply realistic show-up rates (35-50% for most B2B webinars) and MQL-to-SQL conversion (often 20-35%), which changes the entire cost-per-result conversation with stakeholders expecting cost-per-registration math. Include the fully loaded program cost — platform fees, promotion spend, speaker time, and content production — not just the media budget, since underweighting production cost is the most common way webinar ROI gets overstated in marketing reporting.

FormulaAttendees = registrations × show rate; MQLs = attendees × MQL rate; SQLs = MQLs × SQL acceptance rate; cost per SQL = total program cost ÷ SQLs.

Worked example

Using the values the calculator loads with:

Inputs

Registrations: 1800
Live show-up rate: 40 %
Attendee to MQL rate: 25 %
MQL to SQL acceptance rate: 30 %
Total fully loaded program cost: 14000 $
Average closed-won deal size: 18000 $
SQL to closed-won rate: 18 %

Results

Cost per SQL: $259
SQLs generated: 54
Cost per MQL: $78
Expected closed-won deals: 9.72
Program ROI from expected closed revenue: 1150%

What each field means

Inputs

Registrations: The registrations used in the calculation. Starts at 1800 so you have a working example on load.
Live show-up rate (%): The live show-up rate used in the calculation, measured in %. Starts at 40 % so you have a working example on load. Accepted range: 1–100 %.
Attendee to MQL rate (%): The attendee to mql rate used in the calculation, measured in %. Starts at 25 % so you have a working example on load. Accepted range: 0–100 %.
MQL to SQL acceptance rate (%): The mql to sql acceptance rate used in the calculation, measured in %. Starts at 30 % so you have a working example on load. Accepted range: 0–100 %.
Total fully loaded program cost ($): The total fully loaded program cost used in the calculation, measured in $. Starts at 14000 $ so you have a working example on load.
Average closed-won deal size ($): The average closed-won deal size used in the calculation, measured in $. Starts at 18000 $ so you have a working example on load.
SQL to closed-won rate (%): The sql to closed-won rate used in the calculation, measured in %. Starts at 18 % so you have a working example on load. Accepted range: 0–100 %.

Results

Cost per SQL: Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
SQLs generated: Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Cost per MQL: Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Expected closed-won deals: Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Program ROI from expected closed revenue: Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

What show-up rate should I expect?

35-50% is typical for B2B webinars promoted mainly to your own database. Cold-promoted webinars to purchased or partner lists often run lower, 20-30%, since registration intent is weaker and reminder emails land with less-engaged recipients.

Why do so few registrations turn into SQLs?

Each funnel stage compounds: if only 40% show up, then 25% of those qualify as MQLs, then 30% of those get accepted by sales, you're down to 3% of original registrations becoming an SQL. This isn't a sign the webinar failed — it's normal top-of-funnel math that raw registration counts hide.

What should count as fully loaded program cost?

Platform/tooling fees, any paid promotion or list rental, speaker fees or internal team hours valued at a reasonable rate, and content/slide production. Leaving out internal labor cost is the most common way webinar ROI gets overstated when presented to leadership.

How do I improve cost per SQL without spending more?

The biggest lever is usually MQL and SQL qualification rates, not registration volume — tighter targeting on who you promote to, better lead scoring criteria, and faster sales follow-up while interest is fresh typically move these rates more than adding registration budget.

Accuracy and limitations

Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.

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Cite this calculator

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APA

RevenueLab. (2026). Webinar Cost Per SQL Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/webinar-cost-per-sql-calculator

HTML

<p>Source: <a href="https://www.revenuelab.fyi/toolbox/webinar-cost-per-sql-calculator" target="_blank" rel="noopener">Webinar Cost Per SQL Calculator — RevenueLab</a> (2026).</p>

Markdown

Source: [Webinar Cost Per SQL Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/webinar-cost-per-sql-calculator) (2026).