Selling Online Calculators

Selling online is a business of small percentages: a platform fee here, a payment fee there, shipping you charge versus shipping you pay, stock that sits for months, and ads that only work above a certain return. None of these is hard to calculate, but each is easy to leave out, and together they decide whether an order makes money. These calculators take the figures from your own shop or marketplace account and show the result with the working.

Start with profit per order, because every other decision depends on the margin it reveals: the free-shipping threshold you can afford, the return on ad spend you need, and how much stock you can carry without tying up cash.

• Break-Even ROAS CalculatorThe return on ad spend you need to break even, from your margin, and the ROAS for a target profit
• Free Shipping Threshold CalculatorThe order value at which free shipping stops costing you margin, from your average order and shipping cost
• Inventory Turnover CalculatorInventory turnover and days of inventory from cost of goods sold and average stock value
• Profit per Order CalculatorProfit and margin on one order after product cost, marketplace fees, payment fees and shipping
• Reorder Point CalculatorThe stock level at which to reorder, from daily sales, supplier lead time and safety stock