ComputeZap
Free calculators & converters — no signup, ever
What it does
ComputeZap is a free collection of 60+ calculators and unit converters — mortgage, loan, BMI, GPA, unit conversions, and more. No account, no signup, no paywall. Everything runs instantly in your browser and your numbers are never stored or shared. Built for people who just want a fast, accurate answer — not another app to download.
Free online calculators and unit converters — cm to inches, kg to lbs, percent off, CD calculator, days from today, and more. Fast, accurate, no signup.
What date is exactly 30 days from today? Net 30 payment deadline How many tablespoons in a cup? 1 cup = 16 tbsp — all fractions Convert grains to milligrams — 1 grain = 64.799 mg (aspirin, bullets) Convert dwt to grams — 1 dwt = 1.555 g (jewelry & precious metals) Convert troy oz to lbs — 1 troy oz = 0.06857 lbs (gold & silver) Convert 0.5 → 1/2, 0.625 → 5/8 — shows steps and mixed number Body fat % using U.S. Navy Method or BMI Method — category, lean mass, fat mass Our finance calculators handle the math so you can focus on the decision. The CD calculator computes exact interest earnings using the compound interest formula. The mortgage payoff calculator shows how much interest you save…from computezap.com
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CalcVerse19d ago · calcverse-online.vercel.app · ▲1Free, private calculators for finance, health, and math
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A spent a few days designing and programming a calculator app that I thought would be intuitive and simple. It utilizes a single gesture control as well as shake detection. It's free for iPhone: http://itunes.apple.com/us/app/numbrs/id517346105?mt=8 If you download it, let me know what you think.
MindHiveNest Calculator4d ago · mindhivenest.com · ▲1Calculate CGPA, SGPA, BMI, EMI & more — 100% free
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Life & fun · 10d ago · louisabraham.github.io
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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.
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