Free calculators
Free calculators for shop owners.
Quick answers to the sums retailers do every week: the margin on a product, the price for a markup, VAT on an invoice, sales tax on a sale and when to reorder stock.
In short
Each calculator works in your browser with no sign-up. Use the profit margin and markup calculators to price products, the VAT or sales tax calculator to add or remove tax, and the reorder point calculator to decide when to place your next order.
Free calculators
- Profit margin calculatorMargin and profit from cost and selling price.
- Markup calculatorSelling price from cost and markup.
- VAT calculatorAdd or remove UK VAT at 20%, 5% or 0%.
- Sales tax calculatorAdd or remove US sales tax at any rate.
- Reorder point calculatorWhen to reorder, from daily sales and lead time.
Let the POS do the sums.
POS2026 works out profit, stock levels and reports from your real sales automatically.
