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SaaS Metrics Calculator

Get LTV, LTV:CAC ratio and CAC payback in one place.

Growing your businessStep 5 of 7

Best for: Tracking a subscription business, preparing investor updates, or stress-testing growth assumptions.

Complete guide
See benchmark ranges Why this result happened View assumptions
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Result

Estimate
LTV₹26,667
LTV:CAC ratio: 5.3:1
CAC payback6.3 months
Standard formula Private — runs in your browser, no account

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Part of the 🚀 Grow a Business pathNext: Runway Calculator
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More about this result
Result quality
Type
Industry Standard
Method
Industry-standard method
Confidence
High

Uses the standard formula and conventions the industry relies on.

What this means

Together these reveal unit economics: are you acquiring customers profitably, and how fast do they pay back what they cost?

What impacts this result most?
  1. 1.
    ChurnHigh impact

    Drives LTV and growth ceiling.

  2. 2.
    ARPUHigh impact

    Raises LTV and MRR.

  3. 3.
    CACHigh impact

    Sets payback and LTV:CAC.

  4. 4.
    Gross marginMedium impact

    LTV is on gross profit.

How to improve this result
  • Cut churn
  • Improve LTV:CAC toward 3:1+
  • Shorten CAC payback
3 Important insights
  • Margin (on price) and markup (on cost) are not the same.
  • Your break-even depends on fixed vs variable costs.
  • A small price increase moves profit more than a small cost cut.

Most business outcomes hinge on a couple of inputs - find the lever that moves the result most.

People usually ask next
Is this above average?

Worth a revisit later — your costs and margins change.

Was this helpful?
How it's calculated & sources
The SaaS Metrics Calculator uses the standard formula for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Figures are educational estimates, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.
Key assumptions
  • Constant rates
  • Gross-profit LTV

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

How it works

LTV = (ARPU × margin) ÷ monthly churn. LTV:CAC compares value to acquisition cost (aim ≥ 3:1). Payback = CAC ÷ (ARPU × margin).

Frequently asked questions

What's a good CAC payback?+

Under 12 months is healthy for most SaaS businesses.

Continue your journey

Where people usually head next.

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See how many months of runway your cash gives you.
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CAC Calculator
Calculate your customer acquisition cost.

Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is SaaS Metrics?
A SaaS metrics calculator computes the core subscription numbers — MRR and ARR, churn, customer lifetime value (LTV), customer acquisition cost (CAC) and the LTV:CAC ratio and CAC payback — that describe a subscription business's health.
Why does SaaS Metrics matter?
It is the heartbeat metric of any subscription business and the basis for ARR.
How is SaaS Metrics calculated?
MRR is active accounts times average revenue per account; ARR is MRR times 12. Churn is customers (or revenue) lost divided by the amount you started with. LTV is roughly average revenue per account times gross margin divided by the churn rate. CAC is sales and marketing spend divided by new customers won. The LTV:CAC ratio and the payback period (CAC divided by monthly gross profit per customer) show whether acquisition pays off.
What is a good saas metrics?
Aim for LTV:CAC of at least 3:1
What are common saas metrics mistakes?
Confusing gross and net revenue churn (net can be negative when expansion outweighs losses).
When should you use the SaaS Metrics Calculator?
Tracking a subscription business, preparing investor updates, or stress-testing growth assumptions.

What is the SaaS Metrics Calculator?

A SaaS metrics calculator computes the core subscription numbers — MRR and ARR, churn, customer lifetime value (LTV), customer acquisition cost (CAC) and the LTV:CAC ratio and CAC payback — that describe a subscription business's health.

How the SaaS Metrics Calculator works

MRR is active accounts times average revenue per account; ARR is MRR times 12. Churn is customers (or revenue) lost divided by the amount you started with. LTV is roughly average revenue per account times gross margin divided by the churn rate. CAC is sales and marketing spend divided by new customers won. The LTV:CAC ratio and the payback period (CAC divided by monthly gross profit per customer) show whether acquisition pays off.

  1. Enter your monthly recurring revenue (mrr) — the predictable subscription revenue a business earns each month.
  2. Enter your annual recurring revenue (arr) — the yearly value of recurring subscription revenue, usually MRR times 12.
  3. Enter your churn rate — the percentage of customers or revenue lost in a period.
  4. Enter your customer acquisition cost (cac) — the average amount spent on sales and marketing to win one new customer.
  5. Enter your lifetime value (ltv) — the total profit you expect from a customer over the whole relationship.
  6. Read the result, then change any input to compare scenarios instantly — the SaaS Metrics Calculator recalculates as you type.

Understanding the inputs

What each value means, why it matters, and a typical range — so you can fill in the calculator with confidence.

Monthly Recurring Revenue (MRR)

The predictable subscription revenue a business earns each month.

Why it matters:
It is the heartbeat metric of any subscription business and the basis for ARR.
Typical range:
Grows with the customer base; tracked month over month.
How it affects results:
  • Higher: A larger, more predictable revenue base.
  • Lower: A slower, smaller recurring base.

Common mistake: Including one-off (non-recurring) fees in MRR.

Annual Recurring Revenue (ARR)

The yearly value of recurring subscription revenue, usually MRR times 12.

Why it matters:
It is the headline number for valuing and planning a subscription business.
Typical range:
MRR x 12.
How it affects results:
  • Higher: A larger recurring annual base.
  • Lower: A smaller recurring annual base.

Common mistake: Counting one-time revenue in ARR, which overstates the recurring base.

Churn Rate

The percentage of customers or revenue lost in a period.

Why it matters:
High churn quietly caps growth and slashes lifetime value.
Typical range:
5% to 7% per year is often cited as acceptable for SaaS; lower is better.
How it affects results:
  • Higher: Customers leave faster, shrinking lifetime value.
  • Lower: Customers stay longer, raising lifetime value.

Common mistake: Mixing customer churn and revenue churn, which can differ a lot.

Customer Acquisition Cost (CAC)

The average amount spent on sales and marketing to win one new customer.

Why it matters:
It only makes sense next to lifetime value; together they show if growth is profitable.
Typical range:
A healthy LTV:CAC ratio is around 3 to 1.
How it affects results:
  • Higher: More expensive growth that can erode profit.
  • Lower: More efficient growth.

Common mistake: Counting only ad spend and ignoring salaries, tools and content.

Lifetime Value (LTV)

The total profit you expect from a customer over the whole relationship.

Why it matters:
It sets how much you can afford to spend to acquire and keep a customer.
Typical range:
Aim for LTV at least 3x your CAC.
How it affects results:
  • Higher: More room to invest in growth.
  • Lower: Less room to spend on acquisition.

Common mistake: Using revenue instead of gross profit, which overstates LTV.

Benchmark reference

What counts as poor, average or excellent for this metric.

Customer Acquisition Cost

AverageEvaluate vs LTV

Source: Standard unit-economics guidance · Updated June 2026

LTV:CAC Ratio

Average~3:1

Source: Standard SaaS unit-economics guidance · Updated June 2026

Customer Churn

Average5-7%/yr (SaaS)

Source: General SaaS benchmarks · Updated June 2026

Typical values

Customer Acquisition Cost:
Aim for LTV:CAC of at least 3:1
LTV:CAC Ratio:
Aim for about 3:1 or higher
Customer Churn:
~5-7% annual is often acceptable; lower is better

Common interpretation errors

  • Judging CAC without LTV beside it
  • Counting only ad spend, not salaries and tools
  • Above ~5:1 can mean under-investing in growth
  • Use gross-profit LTV
  • Customer churn and revenue churn differ
  • Varies by segment and price point

What impacts results most

  1. 1.
    Churn (High impact)Drives LTV and growth ceiling.
  2. 2.
    ARPU (High impact)Raises LTV and MRR.
  3. 3.
    CAC (High impact)Sets payback and LTV:CAC.
  4. 4.
    Gross margin (Medium impact)LTV is on gross profit.

Key assumptions

  • Constant rates
  • Gross-profit LTV

What's a typical value?

An LTV:CAC around 3:1 and a CAC payback under roughly 12 months are widely cited rules of thumb — useful reference points, not hard rules.

LTV : CAC ratio and the common 3:1 rule of thumb

$3,000$3,0001 : 1Below the 3:1 rule of thumb
$6,000$3,0002 : 1Below the 3:1 rule of thumb
$9,000$3,0003 : 1Healthy (3:1 – 5:1)
$12,000$3,0004 : 1Healthy (3:1 – 5:1)
$15,000$3,0005 : 1Strong — consider spending more to grow

Key terms

MRR / ARR:
Monthly and annual recurring revenue.
Churn:
The rate at which customers or revenue are lost.
LTV / CAC:
Lifetime value of a customer versus the cost to acquire one.

Common mistakes to avoid

  • Confusing gross and net revenue churn (net can be negative when expansion outweighs losses).
  • Leaving gross margin out of LTV, which overstates it.
  • Mixing monthly and annual figures.
  • Counting one-off setup fees in recurring MRR.

Related concepts

How LTV:CAC connects to the concepts around it.

CAC:
The average cost to win one new customer.
LTV:
The total profit expected from a customer over time.
Churn:
The percentage of customers or revenue lost in a period.

Reviewed sources & methodology

Methodology: Industry Standard · Last reviewed June 2026.

Keywords: saas, metrics, ltv, cac, churn.

This is an educational estimate, not financial advice. Rates, rules and figures change — verify the latest with the provider or a qualified advisor before you decide.

Sources: General SaaS finance references

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the SaaS Metrics Calculator free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the SaaS Metrics Calculator?+

SaaS Metrics Calculator uses the standard saas metrics formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The SaaS Metrics Calculator runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the SaaS Metrics Calculator on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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