Free ecommerce calculatorsDo the math before you spend.
Work out profit, ad limits, COD returns, offers, customer value and stock. Every calculator shows its formula and a worked example, and runs in your browser. No sign-up.
With example numbers:
Profit and pricing
- Ecommerce profit calculatorBlended Profit after ads, shipping, product cost and returns.
- Margin and markup calculatorMargin and markup use the same two numbers and give different answers. Enter your cost and price to see both, plus the price you need to hit a target margin.
- Break-even calculatorFind how many orders a month you need before the business stops losing money, how many you need for a profit target, and where you stand today.
- Product pricing calculatorWork back from your costs to the price that keeps the margin you want, after shipping, payment fees and your share of fixed costs.
- Contribution margin calculatorSee what one order really leaves after product cost, shipping, payment fees and the ad cost to get it, and how much ad cost an order can carry.
- Landed cost calculatorYour supplier price is not your product cost. Add freight, customs duty, clearance and local delivery to see what each unit costs when it reaches your shelf.
- Payment fee calculatorSee what your payment gateway takes each month, the rate you really pay once fixed fees are added, and what moving sales off a marketplace would save.
- Wholesale margin calculatorCheck that your wholesale price leaves enough for you and for the retailer, and compare it with selling the same product yourself.
Ads
- ROAS calculatorA ROAS number means nothing until you know the line it has to beat. Enter spend, revenue and margin to see your ROAS next to your break-even and target ROAS.
- Max cost per order calculatorFind the most you can pay for one order on Meta or TikTok and still make money, for cash on delivery with returns and for prepaid orders.
- Ad budget calculatorStart from the revenue you want, get the ad budget it takes, then check whether your CPM, click rate and conversion rate can actually deliver it.
- MER calculatorMER (marketing efficiency ratio) checks all your marketing against all your revenue, so no platform can take credit for sales it didn't make.
- CPA, CPM, CPC and CTR calculatorTurn five numbers from any ad account into the six metrics that explain a campaign: CPA, CPM, CTR, CPC, conversion rate and ROAS.
- Ad frequency calculatorSee how often the same people see your ads, per week and per creative, and how many days each creative has before it hits the limit you set.
- Influencer ROI calculatorCheck whether a creator paid back: ROI, ROAS and cost per order from the fee and product you sent, plus what the same reach would cost in ads.
COD, delivery and returns
- COD profit calculatorCash on delivery profit is decided after the order: by how many orders get confirmed and how many the courier delivers. Enter your funnel and costs to see what you keep after returns and ads.
- Courier cost calculatorThe cheapest courier is not always the one that earns you the most. Compare three couriers by cost per delivered order and profit per shipment, with returns included.
- Returns cost calculatorA return costs more than the refund suggests and less than many calculators claim. See the real cost per return and what your return rate does to break-even ROAS.
Offers and AOV
- Discount impact calculatorBefore you run a sale, see how many extra orders the discount needs just to earn the same profit, and what happens at the lift you expect.
- Free shipping threshold calculatorSet free shipping where the extra order value pays for the shipping you absorb. See the threshold your margin supports and test any threshold against it.
- Upsell calculatorSee what an upsell or cross-sell is worth: extra revenue and profit, the new average order value, and the effect over a year.
- Buy X get Y calculatorSee what a buy X get Y offer really costs you: the effective discount, the price per unit and your profit on the whole set.
- Quantity discount calculatorCheck whether a 'buy 3, save 15%' tier earns more than selling one unit, and how many tier buyers need to be real upgrades for it to pay off.
- Free gift vs discount calculatorBoth offers push customers to spend more. Compare a free gift and a percentage discount at the same threshold and see which one keeps more profit.
Customers
- Customer lifetime value calculatorWork out what one customer is worth over the time they buy from you, in revenue and in profit, and the most you can pay to win one.
- Customer acquisition cost calculatorSee what a new customer costs you, whether the first order pays it back, and how many months it takes to earn it back if not.
- Retention and churn calculatorSee how many customers you keep and lose in a period, how long an average customer stays, and the right way to turn yearly churn into monthly.
- Loyalty program ROI calculatorBefore you launch a loyalty program, see what a higher repeat rate is worth in extra customers, revenue and profit over a year.
Conversion and email
- Conversion rate calculatorSee your conversion rate and revenue per visitor, and what reaching a target conversion rate would add to revenue with the same traffic.
- Cart abandonment calculatorSee how much revenue is left in checkouts people start and don't finish, and what a recovery message on WhatsApp or email could bring back.
- A/B test duration calculatorFind out how many visitors each version needs and how many days your test must run before you can trust the result.
- Email list value calculatorSee what your email list earns each month, what each subscriber is worth over a year, and whether email pays for its cost.
Inventory and shipping
- Reorder point calculatorKnow when to reorder and how much: reorder point and safety stock by two methods, plus the order size that keeps ordering and holding costs lowest.
- Inventory turnover calculatorSee how fast your stock sells, what it earns for every unit of money tied up in it, and how many days you have left before you run out.
- Sales forecast calculatorProject where steady monthly growth takes your revenue: month by month, the final month and the total for the period.
- Volumetric weight calculatorCouriers bill the bigger of the actual weight and the space a parcel takes. See which one you are paying for.
Every formula on this page is open source (MIT) and tested against the worked examples of widely used free calculators. See the code on GitHub
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