Free tools
Calculators for the sums that decide whether a sale was worth making
Every one of these runs in your browser, shows the formula it used, and works with JavaScript switched off. Nothing you type leaves the page.
What are Crate's free calculators?
Crate publishes a small set of free calculators for the arithmetic a shop owner does on the back of an envelope and usually gets slightly wrong. Each one does a single job, runs in the page with no signup, no email wall and no limited free version, and shows its working so you can check the answer rather than trust it. They cover what an order actually costs you once every fee is counted, how many orders a month cover your fixed costs, how much tax to add to or strip out of a price, and how much extra volume a discount has to earn back. You do not need a Crate account to use any of them, and nothing you type is sent anywhere or stored.
Other free calculators
Payment fee calculator
Order value in, take-home out, with the card fee, the platform fee and the settlement fee named separately.
Open the calculatorProfit margin calculator
Margin and markup side by side, and the reverse sum: the price that reaches the margin you actually want.
Open the calculatorBreak-even calculator
Fixed costs, average order and fees in. How many orders a month before anything counts as profit.
Open the calculatorSelling cost comparison
What a month of selling costs on Crate against other platforms, at your own volume.
Open the calculatorVAT and sales tax calculator
Add tax to a price or strip it out of one, with one rate or two.
Open the calculatorDiscount impact calculator
How much extra you have to sell to make a discount pay for itself.
Open the calculatorWhat Crate is, in case you came here for the calculator
Crate is commerce software for small and mid-sized businesses: an online store, orders, payments, point of sale and customers in one dashboard, in your own currency and on the payment rails your customers already use. The calculators above are free and stay free whether or not you ever open an account.
Run the whole shop from one dashboard
Store, orders, payments, point of sale and customers in one place, priced for a small business.
14-day free trial · No card required