Numbers every store owner and merchandiser needs: sale prices, margins, deals, tests and tax.

Price converter

Work out the sale price, the discount or the regular price from the other two - in percent or dollars.

Open tool

Margin & markup calculator

From any two of cost, price, margin or markup, get the rest - and stop mixing up margin and markup.

Open tool

Deal comparer

20% off, $15 off or buy two get one free? See which deal is really cheapest for your cart.

Open tool

A/B test calculator

Is version B really better? Get conversion rates, lift and statistical significance.

Open tool

Sales tax calculator

Add tax to a price, or take it out of a price that already includes it - any rate, sales tax or VAT.

Open tool