The Price Rounding Psychological Pricer is a free online tool that rounds prices to charm endings like .99 or .95 and shows the rounded price and the revenue difference per unit. It runs entirely in your browser, so you do not need to install anything, create an account, or share your business data with anyone. You open the page, type in your own numbers, and get a clear answer in seconds. Small sellers often make pricing decisions by guesswork, and this tool replaces that guesswork with simple arithmetic you can check yourself.
It is made for sellers choosing charm prices for a shop or a price list. If you sell products through a shop, a market stall, a website, or a distributor, you already know that a price that looks good on paper can fail in real life. Costs, margins, and discounts interact, and a small change in one number can change the whole result. This tool keeps those numbers visible side by side, so you can see the effect of each choice before you commit to it.
You start by entering the price to round and the charm ending to use. Use real numbers from your own business where you can, not round guesses. If you are unsure about a cost, use your best careful estimate and then test a slightly higher cost as well. That second test shows you how sensitive your result is. A price that only works when every cost is perfect is a fragile price, and it is better to find that out here than after you have printed a price list.
Take this worked example: a price of 20.37 rounded to a .99 ending. The tool shows a rounded price of 19.99 and a difference of minus 0.38 per unit. Notice how the answer is not just one number. It breaks the result into its parts, so you can see where the money goes at each step. That breakdown is the useful part, because it tells you which step to change if the final number is too low or too high for your business.
The result matters because charm pricing trades a little revenue per unit for a price that feels lower, and that trade should be measured. Many sellers look only at the selling price and forget the margin hidden inside it. A product can sell well and still lose money, or sell slowly and still earn well, depending on that margin. Reading the full result, not just the headline price, is what turns a price into a business decision rather than a hope.
A common mistake is rounding every price down to .99 without adding up what the small losses cost across all units sold. It is easy to make because the mistake feels like good business at the time. A lower price feels generous to customers, and a bigger bundle feels like better value. Both can be true and still damage your margin if the numbers underneath do not support them. The tool helps you catch that problem before customers see the offer, while it is still cheap to fix.
Add up the per unit difference across your expected volume before adopting a charm ending everywhere. This is a practical habit, not a theory. Test the price you want, then test a price five percent higher and five percent lower. Compare the margin in each case and ask yourself which result you could live with if sales stayed flat. The best price is often not the lowest price or the highest price. It is the price that leaves a margin you can defend when costs rise or sales slow down.
There are limits to what a simple calculator can do. it rounds down to the charm ending, it does not test whether customers actually respond to it. It cannot predict how customers will react, how competitors will respond, or whether a product will sell at all. Those questions need market testing, customer feedback, and real sales data. What the tool can do is make sure the arithmetic behind your offer is sound, so that if the offer works, it also earns money. Sound arithmetic is the foundation, and market testing builds on top of it.
The figures here are estimates for planning only, not professional financial advice. Your real costs, taxes, and business terms may differ, and you should check important decisions with your own records or a qualified adviser where needed. Used that way, this free tool is a practical helper for everyday pricing work. Enter honest numbers, read the full breakdown, test a few versions, and choose the price that protects your margin and stays fair to your customers.
La Calculadora de Precios Psicologicos 99 y 95