Utility Tools — Free Online Calculators

What it does

A growing collection of free online calculators and utility tools for everyday tasks. Fast, simple, and easy to use — with no signup required.

Free, simple online calculators and utility tools.

Quick, straightforward calculators and utilities that give you the answer without unnecessary steps. Calculate percentages, percentage changes, and common percentage problems. Calculate GST amounts and prices including or excluding GST. Count words, characters, sentences, and paragraphs instantly. Estimate fuel costs for a journey using distance and mileage. Estimate returns and future value from regular SIPfrom orangescar03.github.io

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  Utility Tools | Free Online ToolsNov 2025 · utility-tools-ecru.vercel.app · ▲5

  Calculators, converters & utilities

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  Free Calculators2025 · freecalculators.app · ▲7

  Free online calculator

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  ( Easy Online Free Quick Tools)Jun 2026 · easyfreetools5.blogspot.com · ▲2

  Easy Online Quick Tools

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  Free Tool Now2025 · freetoolnow.com · ▲17

  100+ free online tools for instant solutions

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  Free Online Calculators & Utility ToolsMay 2026 · quickcalclab.com · ▲2

  Finance · Productivity · Tools

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  Math Tools2025 · mathtools.top · ▲13

  Free online mathematical , calculators and password tools

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  /dev/null▲483

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

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  Talanoa▲345

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

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  An e-ink frame that hears birds and draws them as 1800s illustrations▲2,389

  E-ink bird frame for Raspberry Pi - real-time bird detection by audio, fully local AI, rendered as real, hand-cut 1800s bird illustrations. - arnegiacomo/fugleramme

  AI · Sep 2026 · github.com

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  What if the speed of light was 5 km/h?▲629

  Special relativity simulator in which light crawls along at a human speed, so Lorentz contraction, aberration and Doppler shift happen at walking pace.

  Life & fun · Sep 2026 · rivendell.dmitrybrant.com

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  Jev▲544

  Fast, structured AI decisions for software automation

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  ReSO AI▲510

  Get discovered & recommended when customers ask AI

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  Kilo Code for iOS and Android▲498

  Start coding agents, control sessions, review PRs. Anywhere.

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  AINA▲497

  Find your job search blind spots with an AI coach

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