SaaS Metrics

SaaS calculators. Plug in your numbers, get the operator’s read.

Nine quick calculators for the numbers that actually decide a SaaS business. Each one runs entirely in your browser — nothing is sent or stored — and each gives you more than a figure: it tells you what your result means, the way a sixteen-year operator would read it. No signup, no spreadsheet.

Growth & efficiency

Is the engine actually working?

Unit Economics
Rule of 40 →
Growth rate plus profit margin. The company-level balance test — with a read on whether your 40 is the durable kind or the unproven kind.
Unit Economics
Magic Number →
Net new ARR per dollar of sales & marketing. Tells you whether the go-to-market motion is paying back — or whether to invest harder.
Growth
Quick Ratio →
MRR added per dollar lost. The cleanest read on whether growth is outrunning churn, net of everything.

Unit economics

Is each customer worth what you pay?

Unit Economics
LTV:CAC ratio →
Lifetime value against acquisition cost, the honest gross-margin way. The classic 3:1 test for whether the model works.
Unit Economics
CAC Payback →
Months to recover what you spent acquiring a customer — gross-margin-adjusted, the version a board actually grills you on.

Retention

Does the base hold, or leak?

Retention
Net Revenue Retention →
Whether your existing customers grow on their own before you sell anything new — with your gross retention floor alongside it.
Retention
The cost of churn →
Projects how many customers — and how much MRR — your churn rate quietly takes from you over the next year.

Cash

How much time do you have?

Unit Economics
Runway →
Months of cash left at your current burn — and a reminder that a profitable company sets its own clock.
Unit Economics
Burn Multiple →
Cash burned per dollar of new ARR — the harsh efficiency read investors increasingly anchor on.

The numbers are useful. A weekly rhythm around them is the point.

A calculator answers a question once. Upbeat keeps these numbers — retention, CAC, runway, the Rule of 40 split — in front of your leadership team every week, with the operator’s read built in, so you act on them instead of recalculating them.

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