Two quick calculators that run right in your browser. Find your average order value, then forecast what a post-purchase upsell could add. No email, no signup, no catch.
Enter your total revenue and order count to get your AOV in one tap. It's the single number that tells you how much each checkout is really worth — and the baseline you grow from.
Open the calculator →Plug in your orders, take rate and offer price to see the extra monthly revenue a one-click post-purchase upsell could earn. A fast way to size the opportunity before you turn one on.
Open the calculator →Most Shopify dashboards bury two of the most useful numbers you have. These calculators pull them back out so you can act on them.
Average order value (AOV) is your revenue divided by your number of orders. It tells you how much a typical checkout is worth. When AOV goes up, every dollar you spend on ads and email works harder, because each visitor you win is worth more.
Upsell take rate is the share of buyers who say yes to an offer shown right after they pay. A small, steady take rate on the orders you already get can add up fast over a month — with no extra ad spend, because these are people who just bought.
Put the two together and you have a simple growth lever. Raise the average order, capture a few one-click upsells, and your revenue climbs without needing more traffic. That's the whole idea behind a well-timed post-purchase offer.
Want to go deeper? See our roundup of the best Shopify upsell apps for 2026 (or the post-purchase picks), and compare the top tools side by side to find the right fit for your store.
Yes. Every calculator here is 100% free. There's no signup, no email wall and no credit card. You type in your numbers and get the answer right away in your browser. Nothing you enter is stored or sent anywhere.
There's no single magic number — a good AOV depends on what you sell. A phone-case store will sit lower than a furniture store. The better goal is to grow your own AOV over time. Use the calculator to set your baseline, then watch whether upsells, free-gift thresholds and bundles move it up month over month.
A post-purchase take rate — the share of buyers who accept the one-click offer — is often in the low double digits, and it varies a lot by offer, price and product fit. A relevant, lightly discounted add-on tends to convert better than an expensive, unrelated one. Start the calculator with a conservative rate, then test offers to find your real number.
Not strictly. You can lift AOV with bundles, free-shipping thresholds and manual recommendations. But an app makes the high-impact moves automatic: a one-click post-purchase upsell that adds to the same order with no re-entered card, plus a cart drawer with free gifts and volume discounts. Oxify Post Purchase Upsell bundles all of that from $19.99/mo.