The 8 calculators every marketing agency uses on client calls.
The unit-economics math behind every retainer pitch. CAC, CLV, conversion lift — the numbers clients want translated from their dashboard into a budget decision.
- • Quote payback period and CLV/CAC ratio in front of the client during the QBR — the moment that turns 'should we cut spend?' into 'should we double it?'
- • Run conversion-rate-lift scenarios live in the meeting so the client sees what a 0.5pp CRO win is actually worth in revenue terms.
- • Embed CAC and CLV calculators on your agency site so SaaS and e-comm prospects who are evaluating you can run their own numbers and self-qualify.
CAC Calculator
Customer Acquisition Cost — the number every retainer renewal hinges on. Total spend ÷ new customers, with the variations (paid-only, blended, fully-loaded) the client's CFO actually cares about.
8 more calculators every marketer should bookmark.
Click any calculator to use the full version — formulas, examples, FAQs, and the option to embed it on your own site.
CLV Calculator
Customer Lifetime Value — the other half of the unit-economics equation. CLV/CAC ratio is the single number that defines whether the channel scales.
Open calculatorConversion Rate Calculator
Quick percentage math from sessions or impressions to conversions. Run lift scenarios live during a CRO discussion.
Open calculatorCPC Calculator
Cost-per-click from total spend and clicks. Useful for back-of-napkin paid-channel benchmarking when the client's GA4 data is messy.
Open calculatorBounce Rate Calculator
Quick visualization for landing page audits. Useful for explaining why the new GA4 'engagement rate' moved without bounce rate moving directionally.
Open calculatorMargin Calculator
Gross margin math for e-comm clients — the input under any LTV calculation that isn't pure subscription revenue.
Open calculatorRevenue Calculator
Forecast revenue from traffic × conversion rate × AOV. The model behind every 'what if we increase the budget 30%' conversation.
Open calculatorBreak-Even Calculator
Required volume at given price and cost structure. Comes up in pricing discussions with consulting clients launching a new product line.
Open calculatorPercentage Calculator
Boring tool, used twice an hour. % change, % of total, % off — the math that's faster here than in a spreadsheet column.
Open calculatorA SaaS client asks 'are we paying too much per customer?' Here's the QBR answer.
Priya Patel runs a marketing agency. Her client is a B2B SaaS doing $1.4M ARR, paying her $14k/month to manage paid search, content, and email. The CFO sends an email Tuesday: 'I think CAC is too high — can we discuss next week?' She has the QBR Thursday. The whole meeting is going to live or die on whether the unit economics actually pencil.
She pulls last quarter's data: $42k total marketing spend, 28 new customers closed, average ACV $14k, gross margin 78%. Open the CAC calculator in front of the CFO on the shared screen — fully-loaded CAC of $1,500. The CFO nods; that number is fine for B2B SaaS at that ACV. The conversation could end there. But Priya keeps going.
Pull up the CLV calculator: $14k ACV × 78% margin × 3.2 year average tenure = roughly $35k in gross profit per customer. That's a CLV/CAC ratio of 23. Industry benchmark for healthy B2B SaaS is 3+. The agency isn't even close to overspending — they're underspending. The CFO's question reframes itself: it's not 'should we cut?' it's 'why aren't we spending more?'
Run the conversion rate calculator on the demo-request form: current rate 3.1%, last quarter's traffic 42k. A move to 3.6% (the rate the redesigned page is hitting in A/B test) would generate roughly 210 more demo requests at the current sales-funnel close rate, which is another 17 new customers per quarter at the same CAC. The revenue calculator turns that into $238k of incremental ARR. Priya leaves the meeting with a $4k/month budget increase approved and a CRO scope-of-work signed by Friday. The math didn't replace her thinking — it gave the CFO permission to fund it.
Put the agency toolkit on your site.
Free. No signup. No tracking pixel for your visitors. Works on WordPress, Squarespace, Webflow, or raw HTML. Customize colors and fonts to match your brand. Hosted and updated by us.
<iframe src="https://metricscalculator.com/embed/marketing/cac-calculator" width="100%" height="500" style="border:none;border-radius:8px" title="CAC Calculator" loading="lazy"> </iframe>
Standard iframe — no scripts, no dependencies. Drop it in any HTML block.
Before you bookmark.
Frequently Asked Questions
How is your CAC calculator different from running the math in a spreadsheet?
Functionally it isn't — total spend ÷ new customers is total spend ÷ new customers. The value is doing it on a shared screen in 10 seconds during a meeting, with a clean visual and the option to toggle paid-only, blended, or fully-loaded definitions in front of the client. It's also embeddable on your agency site, which a spreadsheet isn't.
Can I embed CAC and CLV calculators on my agency website?
Yes. Every calculator has a one-click embed builder where you customize colors, fonts, and border to match your agency brand. Output is a single iframe — works on Webflow, WordPress, Framer, Squarespace. Free, no signup. Useful for blog posts ('how to calculate CAC') and for prospect-facing pages ('see if your unit economics scale').
Should I gate the embedded calculator behind an email capture?
Our embed runs without any form gating — by design, because gated calculators on agency sites convert badly. The pattern that works: let prospects use the calculator freely, then put a contextual CTA underneath ('Want help interpreting these numbers?') leading to a discovery call booking. Visitors who interact with the calculator and then click the CTA are already qualified.
Do you have an attribution or multi-touch model calculator?
No. Multi-touch attribution requires data we don't have access to (touchpoint logs, conversion windows, channel decay) and the calculators that purport to do MTA in a generic widget are mostly wrong. Use these for the unit-economics layer (CAC, CLV, conversion); use a real MTA tool (Northbeam, Triple Whale, native GA4 modeling) for attribution itself.
Can I white-label the calculator with no MetricsCalculator branding for premium clients?
The embed includes a small 'Powered by' attribution under the widget — that's required by our terms. For full white-label calculators built into your client tool stack, that's a custom build. Reach out via the contact page.
Which calculator drives the most leads from an agency site?
CAC, on a 'how to calculate customer acquisition cost' content page. It captures B2B founders mid-research, which is the most qualified moment they'll be in your funnel. CLV is second. Both convert better than blog content alone because they create a small personal artifact (a number for the prospect's own business) that anchors the follow-up email.
Other industries we've put together toolkits for.
For small business owners
Margin, break-even, and cost-per-unit tools for running the back office of a small operation.
For financial advisors
Compounding and savings tools for the personal-finance side of agency-owner conversations.
For cpas & accountants
Tax and salary tools that overlap with agency client onboarding.