Free SaaS calculators

Runway, CAC, LTV, churn, MRR, valuation, market size, and dilution. Startup finance, not aviation runway charts.

SaaS calculators

  • Burn Rate Calculator

    How long your cash lasts at the current burn, and the month it runs out — the date every other decision gets scheduled against.

    Calculate runway →
    Calculated

    9 months, 1 week

    Runway

    Position Tight

  • CAC Calculator

    What it actually costs to win one customer. The input that lifetime value, payback and every paid channel decision depend on.

    Calculate CAC →
    Calculated

    $500

    Customer acquisition cost

    Marketing spend $30,000 · Sales spend $20,000

  • LTV Calculator

    Whether a customer earns back what they cost, and how long that takes. CAC on its own cannot tell you either.

    Calculate LTV:CAC →
    Calculated

    3.2 : 1

    LTV to CAC ratio

    Signal Healthy

  • Churn Rate Calculator

    How fast customers leave and what that does to average lifetime. Small churn improvements move lifetime value more than price changes do.

    Calculate churn →
    Calculated

    3.0%

    Monthly churn rate

    Signal Healthy

  • MRR Calculator

    Where recurring revenue lands if the current growth rate holds — compounded month by month rather than added up.

    Project MRR →
    Calculated

    $31,384

    MRR in 12 months

    Current MRR $10,000 · Monthly growth rate 10%

  • SaaS Valuation Calculator

    A defensible ARR-multiple range driven by growth and margin. Useful before a conversation about price, not instead of one.

    Estimate valuation →
    Calculated

    $9,706,667 – $18,026,667

    Estimated valuation

    Annual recurring revenue $1,000,000 · Year-on-year growth 100%

  • TAM SAM SOM Calculator

    Market size built from customers and price rather than a slice of an analyst report, so every input is one you can defend.

    Calculate market size →
    Calculated

    $60,000,000

    Total addressable market

    Potential customers worldwide 50,000 · Annual price per customer $1,200

  • Startup Equity Calculator

    What you still own once a priced round closes, what the investors take, and what the option pool quietly costs you.

    Calculate dilution →
    Calculated

    48.00%

    Your ownership after the round

    Your ownership now 60% · Pre-money valuation $8,000,000

Frequently asked questions

How do I calculate customer acquisition cost (CAC)?
CAC is sales and marketing spend divided by new customers in the same period. Enter those two numbers in the CAC calculator.
How do I calculate SaaS churn?
Logo churn is customers lost divided by customers at the start of the period. Revenue churn uses MRR. The churn calculator does both. Pick the definition your board uses.
What is a good LTV to CAC ratio?
Most B2B SaaS teams aim for about 3:1 (that is why people ask “why is 3x LTV CAC good”). Below 1:1 you lose money on every customer. The LTV:CAC calculator shows your ratio from the inputs you type.
How do you calculate startup runway?
Months of cash left at your current burn: cash divided by monthly net burn. Use the runway calculator. It is startup finance, not an aviation runway chart.
What is TAM, SAM, and SOM?
TAM is total addressable market, SAM is the slice you can serve, SOM is the share you can realistically win. The TAM SAM SOM calculator turns those into numbers for a pitch, not a census.
How do I calculate SaaS metrics?
Start with CAC, LTV:CAC, churn, MRR growth, and runway. Those are the metrics founders search for most. Each has its own Mini App; numbers stay in your browser.

More Mini App categories

  • Landing page tools

    Score a homepage, compare it with rivals, or clone a competitor page. Built for founders shipping a first conversion page.

  • SEO tools

    Check JavaScript SEO, generate and validate sitemaps, write llms.txt, and work through a SaaS SEO checklist. Technical SEO without a paid suite.

  • Backlink tools

    Check domain authority, see who links to a site, and find broken links. Moz-style DA and Ahrefs-style backlink questions, answered without a paid suite.

  • Social OG tools

    See the title, description, and image X, LinkedIn, Facebook, and Slack will pull from your URL, and fix broken share cards before launch day.

  • Reddit tools

    Find subreddits, time posts, and measure share of voice. Built for product research and launch, not subreddit moderation.

  • X tools

    Scan the open For You weights, recap a month of posts, and draw who an account replies with. No X login.

  • Utilities

    Name a product, mock a Stripe-style MRR chart, view HTML, or turn a column into a comma list. No upload, no watermark.

  • Launch planner

    Pick the day, map the run-up on a calendar, and tick off the Product Hunt or Uneed checklist. Planning tools, not upvote pods.

  • Launch helpers

    Write the tagline, product description, launch posts, and cold DMs for launch week. Copy helpers you edit, not autopilot.

  • Sponsorship calculators

    Model newsletter ad cost against CAC and LTV before you book a slot. For founder newsletters, not YouTube sponsorship rates.

All Mini Apps →

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