Show HN: I made a spreadsheet where formulas also update backwards
fouronnes3 Thursday, December 11, 2025Hello HN! I'm happy to release this project today. It's a bidirectional calculator (hence the name bidicalc).
I've been obsessed with the idea of making a spreadsheet where you can update both inputs and outputs, instead of regular spreadsheets where you can only update inputs.
Please let me know what you think! Especially if you find bugs or good example use cases.
Summary
The article discusses the development of an online tool called Bidicalc, which allows users to calculate the bid prices for construction projects based on various criteria such as labor, materials, and other expenses. The tool is designed to help construction professionals streamline the bidding process and make more informed decisions.
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victorpoughon.github.io