Gym Member LTV & Churn Calculator

For gym, studio and box owners. Put in your fee, your monthly churn and what you pay for a new member — get what a member is actually worth, whether your ads are profitable, and the membership ceiling your current numbers set. Nothing is uploaded; the maths runs in your browser.

Your numbers

Membership fee (per month)

Monthly churn (% of members lost)

Gross margin (%)

Cost to acquire one member

Joining fee (one-off)

Current members

New members joining per month

Currency symbol

Monthly churn = members who cancelled this month ÷ members at the start of the month. If you only know your annual number, monthly churn is roughly the annual figure divided by 12.

What a member is worth

The ceiling your numbers set

Lifetime value against churn

Value per member is 1 ÷ churn months of gross profit, so the curve is brutal at the low end: dropping from 7% to 6% is worth far more than dropping from 3% to 2%.

What one point of churn is worth

Monthly churn	Avg. stay	LTV	LTV:CAC	Members at ceiling	Annual gross profit

Your current row is highlighted. Annual gross profit assumes you hold the ceiling membership at your current joining rate.

LTV by fee and churn

Gross-profit lifetime value per member, at your current margin. Useful when you are pricing a new tier.

24-month retention model Pro

Month-by-month members, MRR, acquisition spend and cumulative gross profit — the projection you need to answer "can I afford more ad spend next month?" and "when does this cohort pay me back?"

Month	Members	MRR	Gross profit	Ad spend	Cumulative net

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How the maths works

Nothing here is a black box, so you can argue with it:

Average stay = 1 ÷ monthly churn. 5% churn means the average member stays 20 months.
LTV = fee × gross margin × average stay, plus the joining fee at margin. It is gross profit, not revenue — revenue LTV flatters you.
Payback = acquisition cost ÷ monthly gross profit per member. Under 6 months is comfortable; over 12 means you are financing growth out of cash you do not have.
LTV:CAC — 3:1 is the usual health line. Below 1:1 every new member loses money.
The ceiling = new members per month ÷ churn. This is the number most owners have never worked out: at 15 joins a month and 5% churn you plateau at 300 members no matter how long you stay open. Growth past it comes from retention or a bigger top of funnel, nothing else.