E-commerce & Retail Calculators — United Kingdom
Order value, stock turns and the thresholds that decide margin. The arithmetic is universal; tax is deliberately left to the market pages.
Orders & customers
Average Order Value Calculator
Average order value, revenue per visitor, and what a change in either is worth.
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Return Rate Calculator
Return rate by orders and by value, and what returns actually cost once handling is counted.
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Fulfilment Cost Calculator
The cost to fulfil an order — pick, pack, materials and shipping — and where in-house crosses over against a third party.
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Chargeback Rate Calculator
A store's chargeback rate from its transactions and disputes — against the monitoring threshold the card networks enforce — with the full cost of each chargeback, the annual bill, and how many disputes the threshold actually allows.
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Support Staffing Calculator
How many support agents a ticket volume needs — from tickets a day, the time each takes, the hours in a shift, the occupancy an agent can sustain and the shrinkage that leave and training take — with tickets per agent and the cost.
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Inventory
Inventory Turnover Calculator
How many times stock turns over in a year, how many days of stock you hold, and what it ties up.
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Reorder Point Calculator
When to reorder, and how much safety stock the service level you want actually requires.
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Margin & shipping
Free Shipping Threshold Calculator
Where to set a free-shipping threshold so it lifts order value without giving away the margin.
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Contribution Per Order Calculator
What an order actually contributes after goods, shipping, payment fees and acquisition — the number that decides whether growth helps.
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Marketplace Fee Calculator
What a marketplace sale actually nets after referral fees, payment processing, fulfilment and advertising — and the price you need to hit a target margin.
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Break-Even ROAS Calculator
The return on ad spend you need to break even — and the target that actually delivers a profit, given your margin and repeat rate.
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Product Bundle Pricing Calculator
What a bundle discount costs in margin and how much extra volume it needs to pay for itself.
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Subscription Box Economics Calculator
Whether a subscription box makes money — contribution per shipment, lifetime value against acquisition cost, and the churn that decides it.
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Promotion Break-Even Calculator
How many more units a price promotion has to sell just to earn the profit you made before it — from the price, the unit cost and the discount — with the percentage lift that needs, and the profit change if you know the lift a promotion actually brings.
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About these calculators
These compute standard retail measures from figures you supply. They exclude tax entirely — sales tax, VAT, GST and duty are statutory and per-market, and mixing them into a margin calculation is how retailers end up pricing on the wrong number.