Markup & Margin Calculator
A pricing simulator for markup, margins, fees and profit
What it does
Calculate selling price, gross profit, markup, and profit margin instantly with this free online markup and margin calculator.
Calculate selling price, gross profit, markup, and profit margin from any two values. The two most recently edited fields are kept as your inputs. Calculated fields have a lighter border. Gray numbers are examples. Enter a cost to compare common markups and target profit margins. Use this free calculator to set a selling price, check gross profit, convert between markup and profit margin, or work backward from the numbers you already know. Enter any two values and the calculator finds the remaining pricing metrics. Markup is the percentage added to a product or service cost to set its selling price. Profit margin is gross profit expressed as a percentage of selling price. Both describe the…from markup-calc.com
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Commerce · 26d ago · equitybee.com
Launched alongside, August 2026
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Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com