---
title: "MarTech & SEO SaaS Magic Number Sales Efficiency Calculator | FoundrList Free Tools"
description: "Free magic number sales efficiency calculator built for MarTech & SEO SaaS founders: plug in your numbers and export a Markdown report."
ai_summary: "MarTech & SEO SaaS Magic Number Sales Efficiency Calculator: Free magic number sales efficiency calculator built for MarTech & SEO SaaS founders: plug in your numbers and export a Markdown report. Free browser-based product analytics, funnel & pmf tool on FoundrList. It shows its formula, runs without AI or a server, and has a Markdown (.md) version."
canonical_url: "https://www.foundrlist.com/tools/mar-tech-magic-number-sales-efficiency-calculator"
markdown_url: "https://www.foundrlist.com/tools/mar-tech-magic-number-sales-efficiency-calculator.md"
category: "Product Analytics, Funnel & PMF"
category_url: "https://www.foundrlist.com/tools/category/analytics-metrics"
engine_kind: "formula-calculator"
keywords:
  - "mar tech magic number sales efficiency calculator"
  - "magic number sales efficiency calculator"
  - "martech & seo saas analytics metrics tool"
  - "free startup calculator"
---

# MarTech & SEO SaaS Magic Number Sales Efficiency Calculator

Free magic number sales efficiency calculator built for MarTech & SEO SaaS founders: plug in your numbers and export a Markdown report.

## Formula & Methodology
`Magic Number Sales Efficiency Calculator: Rule of 40 = YoY Growth% + FCF Margin% · Quick Ratio = (New + Expansion MRR) ÷ (Churned + Contraction MRR)`

**Result with the default inputs (Rule of 40 & Quick Ratio):** 77.0% Rule of 40
Your combined Rule of 40 score is 77.0% (65.0% YoY growth + 12.0% FCF margin) with a 4.57x SaaS Quick Ratio and $33,000 in annualized net new ARR.

## Default Inputs
- **YoY ARR Growth Rate (%)** (`a`, percent): Default = `65`
- **EBITDA / Free Cash Flow Margin (%)** (`b`, percent): Default = `12`
- **Monthly New + Expansion MRR ($)** (`c`, currency): Default = `3520`
- **Monthly Churned + Contraction MRR ($)** (`d`, currency): Default = `770`

## Sample Output Metrics
- **Rule of 40 Score:** 77.0%
- **SaaS Quick Ratio:** 4.57x
- **Sales Magic Number:** 0.74
- **Annualized Net New ARR:** $33,000

## How to Use
1. **Enter your own inputs:** Fill in the fields in the MarTech & SEO SaaS Magic Number Sales Efficiency Calculator above. The values already there are examples so the page shows a working result. They are not benchmarks, so replace them with your own.
2. **Read the result and the rule behind it:** The output and supporting figures update as you type. The formula or rule the tool uses is shown next to the inputs, and everything runs in your browser.
3. **Copy or download the result:** Use Copy Output or Download .md to keep the result. Check any figure you plan to act on against your own data.

## Reference Figures
- **Rule of 40:** Growth % + profit margin % above 40%. Bain's 2018 brief uses revenue growth plus EBITDA margin. Source: [Bain & Company, Hacking Software's Rule of 40 (2018)](https://www.bain.com/insights/hacking-softwares-rule-of-40/), accessed 2026-10-27.
- **LTV to CAC ratio:** Higher than 3. Skok says the best SaaS businesses are above 3, and calls it a guideline rather than a rule. Source: [David Skok, SaaS Metrics 2.0 (For Entrepreneurs)](https://www.forentrepreneurs.com/saas-metrics-2/), accessed 2026-10-27.
- **Burn multiple:** Net burn ÷ net new ARR. Lower means each dollar burned buys more new recurring revenue. Source: [David Sacks, The Burn Multiple (2020)](https://sacks.substack.com/p/the-burn-multiple-51a7e43cb200), accessed 2026-10-27.

## Frequently Asked Questions

### How does the MarTech & SEO SaaS Magic Number Sales Efficiency Calculator work?
Free magic number sales efficiency calculator built for MarTech & SEO SaaS founders: plug in your numbers and export a Markdown report. It uses fixed formulas or templates that run in your browser. No AI model is called and your inputs are not sent to a server.

### Are the default values in the MarTech & SEO SaaS Magic Number Sales Efficiency Calculator benchmarks?
No. They are example inputs so the page shows a working result. Replace them with your own numbers. Reference figures on this page link to the source they came from.

### Is the MarTech & SEO SaaS Magic Number Sales Efficiency Calculator free to use?
Yes. There is no sign-up. Every tool page also has a Markdown version: add `.md` to the page address.

### How do I get more traffic and backlinks after using the MarTech & SEO SaaS Magic Number Sales Efficiency Calculator?
Submit your product on FoundrList (/agent) to compete on the weekly launch leaderboard for free (nofollow link), or launch today for $29 (Standard Launch) with a permanent dofollow link, book 50 Directory Submissions for $179 or 100 for $279, or grab the $278 SEO Boost Pack (/pricing) to distribute your startup everywhere.

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