Yusuf Bayrak

    Marketing, SaaS & E-Commerce Calculators

    Free tools that compute your marketing, SaaS and e-commerce metrics in seconds. Pick a category to start — everything runs client-side, nothing is sent to a server.

    //Categories

    Marketing Tools

    Campaign tracking, ad return and AI visibility essentials.

    5 tools

    • — UTM Link Builder
    • — ROAS Calculator
    • — Conversion Rate Calculator
    • — Which Marketing Channel Fits Your Business? (Quiz)
    • — llms.txt Generator

    SaaS Tools

    Measure the growth and retention metrics of a subscription business.

    9 tools

    • — ARR Calculator
    • — MRR Calculator
    • — ARPA Calculator
    • — NRR Calculator
    • — Rule of 40 Calculator
    • — CAC Calculator
    • — CAC Payback Period Calculator
    • — LTV Calculator
    • — Churn Rate Calculator

    E-Commerce Tools

    Calculate true profitability per product and per store.

    2 tools

    • — Gross Profit Margin Calculator
    • — Net Profit Margin Calculator
    //Guide

    What do these free marketing and SaaS calculators do?

    The tools on this page compute the core metrics a marketing or product team tracks every week — ARR, CAC, LTV, churn, ROAS, conversion rate, gross and net profit margin — without you writing a single spreadsheet formula. Each calculator uses the standard industry definition and returns not just a number but a short reading of what that number means for your business.

    Who they are built for: SaaS founders, e-commerce owners and marketers

    SaaS founders get the subscription metrics needed for growth modelling and investor reporting. E-commerce owners see true profitability at product and store level. Performance marketers tag campaign links correctly and read ad return alongside conversion rate. The common thread: see the number before you make the decision.

    When to use the Marketing Tools category

    If your question is "is this campaign working?", start with Marketing Tools. The UTM Link Builder separates traffic sources, the Conversion Rate Calculator shows how much of that traffic turns into action, the ROAS Calculator measures the return on every unit spent, and the llms.txt Generator makes your site legible to AI search engines. These are campaign-level, daily-to-weekly decisions.

    When to use the SaaS Tools category

    If your question is "is my business model sustainable?", SaaS Tools is the right place. ARR sizes your recurring revenue, CAC prices the cost of winning a customer, LTV values what that customer returns over the relationship, and churn shows how fast you lose them. These metrics matter on a monthly-to-quarterly cycle, for unit economics and investor reporting.

    When to use the E-Commerce Tools category

    If your question is "am I actually making money on this product?", move to E-Commerce Tools. The Gross Profit Margin Calculator shows what remains after product cost (COGS); the Net Profit Margin Calculator shows what remains after ads, shipping, marketplace fees and operations. Pricing and ad budget decisions are built on these two numbers.

    Where does your data go?

    Nowhere. Every calculation runs in your browser with JavaScript. The revenue, cost or customer figures you type are never sent to a server, never stored and never shared with third parties. No sign-up, no usage limits.

    //Frequently Asked Questions

    What tool can I use to calculate ARR, CAC, and LTV?

    Use the free calculators in the SaaS Tools category: the ARR Calculator for annual recurring revenue, the MRR Calculator for monthly revenue, the CAC Calculator for customer acquisition cost, the LTV Calculator for lifetime value, plus ARPA and Churn Rate calculators. Everything runs in the browser with no sign-up.

    Is there a free profit margin calculator?

    Yes. The E-Commerce Tools category has two: the Gross Profit Margin Calculator turns revenue and COGS into product-level margin, and the Net Profit Margin Calculator includes advertising, shipping, marketplace fees and operating costs to show true profitability as both a percentage and an amount.

    How do I create a UTM link and which tool builds it?

    Use the UTM Link Builder in the Marketing Tools category: enter the destination URL and fill in utm_source, utm_medium and utm_campaign to generate the tagged link instantly. Keep values lowercase and consistent — GA4 reports these parameters as session source and medium.

    What is the conversion rate formula?

    Conversion Rate = (Conversions / Total Visitors) × 100. For example, 8,000 visitors and 160 sales is a 2% conversion rate. The Conversion Rate Calculator applies this formula and, if you enter a target rate, also shows the gap and how many extra conversions you need.

    Which metrics should SaaS and e-commerce businesses track?

    For SaaS the core set is MRR/ARR, ARPA, CAC, LTV and churn rate, with an LTV:CAC ratio above 3:1 as the healthy benchmark. For e-commerce, read gross profit margin, net profit margin, ROAS and conversion rate together — break-even ROAS = 1 / gross margin. A calculator for each sits in the matching category on this page.