Free Calculators

Free eCommerce calculators for Shopify brands

Work out your ROAS, profit margin, break-even point and what each customer is really worth, using the same maths we run on every account we manage. They’re all free and you don’t need to sign up.

Profitability

Profit Margin Calculator

Calculate gross margin, markup, contribution margin and net profit on a single order.

See what each sale actually keeps once every cost is paid.

Break-Even Calculator

Calculate the orders and revenue you need each month to cover your fixed costs, and your margin of safety.

Turn a revenue goal into a daily order target.

Discount Calculator

Calculate what a discount does to profit per unit and the extra sales needed to earn it back.

Check a sale makes money before you launch it.

Advertising

ROAS Calculator

Calculate your break-even ROAS, target ROAS, actual ROAS and MER from your margins.

Know whether your ads are making profit, not just revenue.

Ad Budget Calculator

Calculate the monthly ad spend, orders, sessions and cost per order you need to hit a revenue target.

Set a budget from what you want to achieve, not last month’s spend.

Conversion Rate Calculator

Calculate your conversion rate and the revenue a higher one adds from the same traffic.

See what improving your site is worth before you pay for it.

Retention & growth

CAC & LTV Calculator

Calculate customer acquisition cost, payback period, lifetime value and your LTV:CAC ratio.

Know how much you can afford to pay to win a customer.

AOV Calculator

Calculate your average order value and the extra revenue and profit a bigger basket adds each month.

Grow revenue from existing customers with no extra ad spend.

Retention Calculator

Calculate retention and churn rate, customer lifetime and what each customer is worth.

See what a few more points of retention are worth.

Why these numbers matter for eCommerce brands

Plenty of seven-figure stores are unprofitable, and almost none of them can see it from the dashboard. These are the four places the money goes missing.

  • Revenue hides the margin

    Goods, shipping, fees and marketing each take a slice of every order, and they live in different spreadsheets. A store can grow 40% and finish the year with less cash, because nobody saw the whole stack on one order.

  • Platform ROAS marks its own homework

    Meta, Google and TikTok each claim credit for the same sales and none of them know your costs. A 4x can lose money and a 2x can print it. The only ROAS that means anything is the one measured against your own break-even.

  • CAC only means something next to LTV

    Acquisition costs rise every year for every brand. Treat CAC as a number to minimise and you starve growth; treat it as a number to afford and you need to know what a customer is worth in profit, not revenue, and how fast they pay back.

  • Growth multiplies what’s underneath

    rsquo;s underneath

    Scale a healthy profit per order and you scale profit. Scale a thin one and you scale the problem, faster, with more stock and more staff. A budget set from a revenue target and checked against margin is the difference.

Frequently asked questions

Which calculator should I start with?
The profit margin calculator, because every other number depends on what one order leaves behind. Its contribution margin feeds the ROAS calculator (what the ads must return), the CAC & LTV calculator (what a customer is worth in profit) and the budget calculator (whether a plan is profitable). If you already know your margin, go straight to the ROAS calculator; it is the one that most often changes a decision.
Are the results accurate?
The arithmetic is, and every formula is printed on its page. The results are only as honest as the inputs: a shipping cost that leaves out returns, a conversion rate from your best month or a customer lifespan you hope for will all flatter the answer. Use trailing averages and round the optimistic numbers down. The calculators deliberately keep to the inputs a founder can actually find in Shopify, their ad platforms and their accounts.
Do you store the numbers I enter?
No. Every calculator runs entirely in your browser; nothing you type is sent to us, saved or tracked. Refresh a page and it goes back to its example. If you want us to look at your real numbers, book a call and bring them.
Can you help improve the numbers?
That is the job. Paid Advertising is judged on CAC and profit against your break-even, Ad Creatives is how an account keeps its ROAS as spend climbs, and Organic Worlds lifts repeat purchase and lifetime value between campaigns. Bring your results from the calculators to the first call and we will tell you which number is holding you back.

Let's find out what's
holding you back

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