uint256 Calculator
Deterministic big-integer calculator for developers
What it does
uint256.xyz is a deterministic big integer calculator built specifically for blockchain developers and DeFi engineers. It handles 256-bit unsigned integer arithmetic — exactly as it behaves on EVM (Ethereum Virtual Machine) and Solana — with full support for: precise addition, subtraction, multiplication, division multiple precision contexts (e18, e9, e12) rounding operators that mirror on-chain rounding logic
Does a similar job
all alternatives →
- IMI made a spreadsheet where formulas also update backwardsDec 2025 · victorpoughon.github.io · ▲252
Hello 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.
- TCThe Coinbase FOMO Calculator2022 · vidacode.github.io · ▲108
Made this using Power BI and the Crypto Watch API. Started making this in November 2021, but never got around to publishing it, so that is the reason for the 'FOMO' in the title - probably a good thing if you 'missed out' on the crypto hype late last year. Now it serves as a way to see how much you 'saved' by not putting in money. Hope someone finds it fun!
- SBSpaculator - Bitcoin Options for Dummies (wannabe)2011 · spaculator.com · ▲16
More commerce this month
the category →
Compare your startup equity grant for free.
Commerce · 27d ago · equitybee.com
Launched alongside, January 2026
the whole month →- IN
Hey HN! I wanted to share something I built over the last few weeks: isometric.nyc is a massive isometric pixel art map of NYC, built with nano banana and coding agents. I didn't write a single line of code. Of course no-code doesn't mean no-engineering. This project took a lot more manual labor than I'd hoped! I wrote a deep dive on the workflow and some thoughts about the future of AI coding and creativity: http://cannoneyed.com/projects/isometric-nyc
AI · Jan 2026 · cannoneyed.com
Automatic AI-powered code reviews the moment you open a PR
Dev tools · Jan 2026 · kilo.ai
