Commerce & retail calculators
Unit economics and inventory maths for shops and online sellers. Marketplace fees are entered by you, because they change by category and seller programme.
Customers & retention
- Customer Retention Rate CalculatorCalculate customer retention rate from customers at the start and end of a period and new customers gained, with churn and customers lost.
- Subscription Churn CalculatorCalculate subscriber churn rate, its annual equivalent, average subscriber lifetime, and gross and net revenue churn from recurring revenue.
- Recurring Order Projection CalculatorProject subscription orders and revenue month by month from current subscribers, new sign-ups, monthly churn, delivery frequency and order value.
- Customer Referral Reward CalculatorCheck whether a refer-a-friend reward pays: cost per referred customer, lifetime gross profit, programme ROI and the most you can afford to give.
- Loyalty Points Redemption CalculatorWork out what a loyalty points balance is worth, how many rewards it redeems for, points left over, value per point and the effective cashback rate.
Import & cross-border
Inventory
- Retail Inventory Turnover CalculatorWork out inventory turnover from cost of goods sold and average inventory, plus days of inventory on hand and an annualised turnover for shorter periods.
- Stock Reorder Point CalculatorCalculate the reorder point from daily demand, supplier lead time and safety stock, and see how many days remain before you need to place the next order.
- Safety Stock CalculatorCalculate safety stock with the standard z × σ method from demand and lead-time variability at a chosen cycle service level, plus the reorder point.
- Economic Order Quantity (EOQ) CalculatorFind the economic order quantity that minimises ordering plus holding cost, with orders per year, cycle length and the total annual cost.
- Shrinkage Rate CalculatorCalculate inventory shrinkage from book and physical stock values, as a percentage of sales (the usual retail measure) and of book inventory.
- Inventory Carrying Cost CalculatorEstimate the yearly cost of holding stock from average inventory value and the cost of capital, storage, insurance, taxes and obsolescence.
- Inventory Stockout Cost CalculatorEstimate what running out of stock costs: units short, profit lost on customers who walk away and the extra cost of backorders.
- Sell-Through Rate CalculatorCalculate sell-through rate from units sold and units available or received, with stock remaining, weekly sales and weeks of supply.
Marketplace & orders
- Marketplace Seller Profit CalculatorWork out profit per unit, margin and break-even price for a marketplace sale after referral, fixed and fulfilment fees and tax on fees.
- Marketplace Referral Fee CalculatorCalculate a marketplace referral or commission fee with a minimum fee, closing fee, fee on shipping and tax on fees, plus your payout per sale.
- Ecommerce Return Rate CalculatorFind your product return rate from units sold and returned, the value refunded, and what returns cost in handling, shipping and stock you cannot resell.
- Return to Origin (RTO) Loss CalculatorEstimate what undelivered, return-to-origin (RTO) orders cost in forward and return shipping, packaging and damaged stock, per order and in total.
- Cash on Delivery Profit CalculatorWork out the expected profit on a cash-on-delivery order after the COD fee, shipping and returned orders, and the RTO rate at which COD stops paying.
- Gross Merchandise Value (GMV) CalculatorCalculate gross merchandise value from orders and average order value, net GMV after cancellations and returns, and platform revenue at your take rate.
Payments
- Payment Gateway Fee CalculatorCalculate payment processing fees from a percentage plus fixed fee, the net amount you receive, the effective rate, and what to charge to net a target amount.
- Refund Processing Cost CalculatorAdd up what each refund really costs beyond the money returned: payment fees not given back, return shipping, handling time and unsellable stock.
Pricing & promotions
- Retail Markdown CalculatorSee the sale price after a markdown, the margin before and after, total markdown cost and how many units you must sell to earn the same gross profit.
- Buy One Get One (BOGO) Discount CalculatorWork out what you pay and the real percentage discount for buy-one-get-one-free, BOGO 50% off or any buy X get Y offer, for any number of items.
- Bundle Pricing CalculatorCompare a bundle price with the items’ separate prices: the customer’s saving and discount, plus the bundle’s profit and margin against your total cost.
- Wholesale Tiered Pricing CalculatorPrice a wholesale order under quantity price breaks, either all-units (whole order at the tier reached) or graduated (each tier’s units at its own price).
Promotions & pricing
- Marketplace Promotion ROI CalculatorCompare profit with and without a marketplace deal: discounted margin, extra units, promotion fees and ad spend, incremental profit, ROI and break-even units.
- Free Shipping Threshold CalculatorFind the minimum order value for free shipping at which the extra gross margin pays for the shipping you absorb, based on your AOV and margin.
- Cart Upsell Revenue CalculatorEstimate the revenue, gross profit and average order value lift from a cart or checkout upsell, given orders, offer reach, take rate and upsell value.
Shipping & fulfilment
- Shipping Chargeable Weight CalculatorWork out the weight a carrier will bill: volumetric (dimensional) weight from box size and your carrier’s divisor, compared with actual weight.
- Shipping Zone Cost CalculatorPrice a parcel from your carrier’s zone rate card: first-weight charge, additional weight steps, fuel surcharge and other surcharges.
Store metrics
- Cart Abandonment Revenue CalculatorCalculate your cart abandonment rate, the value left in abandoned carts and the revenue a recovery campaign could bring back at your recovery rate.
- Average Order Value CalculatorCalculate average order value (AOV) from revenue and number of orders, plus units per order and average unit price when you add units sold.
- Repeat Purchase Rate CalculatorFind the share of customers who ordered more than once in a period, plus one-time customers and average purchase frequency per customer.
- Store Footfall Conversion CalculatorCalculate a store’s conversion rate from footfall and transactions, with average transaction value and sales per visitor when you add sales.
- Sales per Square Foot CalculatorCalculate retail sales per square foot or square metre of selling space, annualised for any period length, to compare stores and space productivity.
Store operations
Warehousing
- Order Picking Productivity CalculatorMeasure warehouse pick rates: order lines, units and orders picked per labour hour, picking accuracy and labour cost per order.
- Warehouse Pallet Capacity CalculatorCount the pallet positions in racking or a floor-stacked area, the working capacity at your target utilisation and how full the warehouse is now.