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SaaS Metrics Calculator

One month of your numbers in, nine results out, every formula shown.

Start calculating Read the formulas
What the saas metrics calculator works out One month of numbers goes in and six SaaS metrics come out, each with the formula shown.

You put in

  • One month of revenue movements
  • Customers and acquisition spend
  • Cash and net burn

Calculate Applies six formulas

You get back

  • Net new MRR
  • Gross revenue churn
  • Quick ratio
  • CAC payback
  • LTV to CAC
  • Runway

Diagram: World Enterprise Group Incorporated. Illustrative: it shows the working, not any figure of yours.

Your numbers stay on this page. Nothing is saved or sent anywhere, and nothing is put in the address bar. Use one currency for every amount. The results carry no currency sign.

Recurring revenue

One month of movement in monthly recurring revenue (MRR). Enter a 0 where nothing happened.

Monthly recurring revenue at the start of the month.

Added by customers who joined this month.

Added by existing customers: upgrades and extra seats.

Lost to downgrades by customers who stayed.

Lost to customers who left this month.

Net new MRR
Waiting
Enter New MRR, Expansion MRR, Contraction MRR, Churned MRR to see this.
Common convention
Gross revenue churn
Waiting
Enter Starting MRR, Churned MRR, Contraction MRR to see this.
Common convention
Net revenue retention (NRR)
Waiting
Enter Starting MRR, Churned MRR, Contraction MRR, Expansion MRR to see this.
Formula from the brief
Quick ratio
Waiting
Enter New MRR, Expansion MRR, Churned MRR, Contraction MRR to see this.
Common convention

Acquiring customers

What the month cost and what it brought in. Margin is the share of revenue you keep after serving it.

Marketing cost for the month. Add sales wages for the extended form.

New paying customers this month, as a whole number.

Revenue less the cost of serving it, as a percent.

Customer acquisition cost (CAC)
Waiting
Enter Acquisition spend, Customers acquired to see this.
Formula from the brief
CAC payback
Waiting
Enter Acquisition spend, Customers acquired, New MRR, Gross margin (%) to see this.
Common convention
Customer lifetime value (LTV)
Waiting
Enter New MRR, Customers acquired, Gross margin (%), Starting MRR, Churned MRR, Contraction MRR to see this.
Formula from the brief
LTV to CAC ratio
Waiting
Enter Acquisition spend, Customers acquired, New MRR, Gross margin (%), Starting MRR, Churned MRR, Contraction MRR to see this.
Common convention

Cash

What the company holds and how fast it is falling.

What the company holds now, in the same currency.

Cash out less cash in over a month. Enter 0 if cash grew.

Runway
Waiting
Enter Cash on hand, Net burn per month to see this.
Common convention

How each number is worked out

Every result above comes from the formula in this table. A formula the research brief does not state is a convention, so the table says which are conventions and links a public page for each. Whichever you report, say which one you used.

Formulas, sources and assumptions
Result Formula Where it comes from Assumptions
Net new MRR New MRR + Expansion MRR - Contraction MRR - Churned MRR Commonly calculated this way: a convention, not a WE method. The research brief does not define it . Stated in How To Calculate MRR, Baremetrics
  • The change in MRR over the month. Starting MRR is not needed.
  • The reference writes it as New MRR + Expansion MRR - Churned MRR, with downgrades counted as churn. Downgrades are entered separately here as Contraction MRR, which gives the same total.
Gross revenue churn ((Churned MRR + Contraction MRR) / Starting MRR) x 100 Commonly calculated this way: a convention, not a WE method. The research brief does not define it . Stated in Revenue churn (net and gross revenue churn rate), ChartMogul
  • The brief defines churn for customers, not for revenue. This is the revenue version: revenue lost to cancellations and downgrades, set against the revenue the month started with. Expansion is not netted off.
  • Only revenue from customers you started the month with counts: Churned MRR plus Contraction MRR cannot be more than Starting MRR.
Net revenue retention (NRR) [(Beginning recurring revenue - MRR lost from churn - MRR lost from downgrades + revenue from upgrades) / Beginning recurring revenue] x 100 Formula from the research brief
  • Beginning recurring revenue is Starting MRR. MRR lost from churn is Churned MRR, MRR lost from downgrades is Contraction MRR, and revenue from upgrades is Expansion MRR.
  • Existing customers only: New MRR is not in it.
Quick ratio (New MRR + Expansion MRR) / (Churned MRR + Contraction MRR) Commonly calculated this way: a convention, not a WE method. The research brief does not define it . Stated in SaaS Quick Ratio, Wall Street Prep
  • A ratio of gains to losses. The inputs are shown beside the result so it can be recomputed.
Customer acquisition cost (CAC) MCC / CA Formula from the research brief
  • MCC is the marketing cost for the period and CA is the customers acquired in it, as the brief reads the symbols.
  • If the spend you enter also holds sales and marketing wages, software, professional services or overhead, the result is the extended form. Label which form you use and do not mix the two in one trend line.
CAC payback CAC / (New MRR per customer x Gross margin) Commonly calculated this way: a convention, not a WE method. The research brief does not define it . Stated in CAC Payback Period, Wall Street Prep
  • The reference states it for the whole month: spend divided by (New MRR x Gross margin). Dividing both by Customers acquired gives the per-customer form shown here, with the same result.
  • New MRR per customer is New MRR divided by Customers acquired. Gross margin is entered as a percent and used as a share.
  • The result is the number of months of gross margin from a new customer that it takes to cover its CAC. Churn during those months is ignored.
Customer lifetime value (LTV) Margin x (Retention / (1 + Discount - Retention)) Formula from the research brief
  • The brief gives the basic form only. Margin is the monthly gross margin of one new customer: New MRR per customer x Gross margin.
  • Retention is one minus gross revenue churn for the month, as a share. This treats lost revenue like a lost customer.
  • Discount, the allowance for the time value of money, is set to 0. The calculator makes no allowance for it.
LTV to CAC ratio LTV / CAC Commonly calculated this way: a convention, not a WE method. The research brief does not define it . Stated in LTV/CAC Ratio, Wall Street Prep
  • The brief notes that a ratio of lifetime value to acquisition cost is sometimes quoted. It publishes no target, and the reference page names one that this page does not repeat.
  • It inherits every assumption of LTV and of CAC.
Runway Cash on hand / Net burn per month Commonly calculated this way: a convention, not a WE method. The research brief does not define it . Stated in Cash Runway Explained, Corporate Finance Institute
  • Assumes this month’s burn repeats. It is arithmetic, not a forecast, and it says nothing about future fundraising.

Your numbers stay on this page

The calculator works in your browser. It sends nothing, it saves nothing, and it does not put your numbers in the address bar, so closing the tab removes them. The page makes no request after it loads, and you can confirm that in your browser’s network panel.

What the results are not

The results are arithmetic on the numbers you typed. They are not advice, a valuation, a forecast, or a statement about whether anyone will invest, and WE makes no promise of funding. The calculator cannot tell whether an entry is right, and it shows no benchmark or target, because the research it draws on publishes none. A figure that looks good here is only as sound as the books behind it.

Report the same way every time

Two reports of “churn” cannot be compared unless they use the same definition. The research brief on early-stage SaaS metrics asks you to answer six questions in writing for every metric you report:

  1. What is the period?
  2. Who is in the population?
  3. Are one-time fees excluded?
  4. Which formula variant is used?
  5. Has the definition changed since the last report?
  6. Can a reader recompute the number from the inputs given?

This calculator answers the first and the last for you: it works on one month, and it shows the working so a reader can recompute each result.

Where the formulas come from

Net revenue retention, customer acquisition cost and customer lifetime value use the formulas published in the research brief on SaaS metrics definitions. The brief does not define net new MRR, gross revenue churn, the quick ratio, CAC payback, the ratio of lifetime value to CAC or runway. For those six, the calculator uses the form in which each is commonly calculated. That is a convention, not a WE method, and the table above links a public page that states each one. Every result carries a label that says which kind it is, and the table lists the formula and assumptions behind every one.

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