Calculator Soup
Focus: calculators. Shares maths and finance with Omni Calculator. Rated 4.5 (Omni Calculator: 4.6).
WebsiteFreeWeb
4.5Visit
Website
Omni Calculator
Thousands of free online calculators explained in plain language.
Rating
4.6 / 5
Pricing
Free
Difficulty
Beginner
Works on
Web, iOS, Android
Built with love by Shushant Lakhyani. Building bestproductivityresources.com
What is Omni Calculator?
Omni Calculator offers thousands of free calculators for finance, health, physics, statistics, construction and everyday maths, each with clear explanations of the formula behind it. You fill in whichever values you know and it works out the rest, which makes it useful for quick checks and learning.
Pros: what Omni Calculator does well
- Huge range of calculators
- Explains every formula
- Works backwards from any value
Cons: where it falls short
- Shows ads
- Results are estimates, not professional advice
Who Omni Calculator is for
Students and professionals who need a quick, explained calculation for almost anything.
Who can skip it
People who already rely on a spreadsheet or specialist software.
Omni Calculator alternatives
Not sold on Omni Calculator? These do a similar job, and each card says what it has in common.
Savvy Trader
Focus: investing, trading and education. Shares finance with Omni Calculator. Freemium (Omni Calculator: Free). Rated 4.0 (Omni Calculator: 4.6).
WebsiteFree planWeb
4.0Visit
Calculator.net
Focus: calculators and health. Shares finance and maths with Omni Calculator. Rated 4.4 (Omni Calculator: 4.6).
WebsiteFreeWeb
4.4Visit
Qalculate!
Focus: unit conversion, open source and github. Shares calculator and maths with Omni Calculator. A desktop app, not a website. Adds Windows, Linux and Offline. Same 4.6 rating.
Desktop AppFreeWindows, Linux
4.6Visit
Math is Fun
Focus: education, worksheets and puzzles. Shares maths with Omni Calculator. Same 4.6 rating.
WebsiteFreeWeb
4.6Visit
RapidTables
Focus: calculators, converters and reference. Shares maths with Omni Calculator. Rated 4.4 (Omni Calculator: 4.6).
WebsiteFreeWeb
4.4Visit
Free alternatives to Omni Calculator
Want to spend nothing? These free picks cover similar ground.
Ghostfolio
Focus: investing, portfolio and self-hosted. Shares finance with Omni Calculator. A web app, not a website. Rated 4.5 (Omni Calculator: 4.6).
Web AppFreeWeb
4.5Visit
Lichess
Focus: chess, puzzles and strategy. Also in Learning and Decision Making, like Omni Calculator. Rated 4.8 (Omni Calculator: 4.6).
WebsiteFreeWeb, iOS
4.8Visit
Choose a License
Focus: licences, open source and legal. Also in Decision Making and Learning, like Omni Calculator. Rated 4.7 (Omni Calculator: 4.6).
WebsiteFreeWeb
4.7Visit
Chrome Music Lab
Focus: music, education and experiments. Also in Learning and Personal Productivity, like Omni Calculator. Rated 4.7 (Omni Calculator: 4.6).
WebsiteFreeWeb
4.7Visit
Laws of UX
Focus: ux design, psychology and design principles. Also in Learning and Decision Making, like Omni Calculator. Rated 4.7 (Omni Calculator: 4.6).
WebsiteFreeWeb
4.7Visit
Monkeytype
Focus: typing test, typing practice and keyboard. Also in Learning and Personal Productivity, like Omni Calculator. Rated 4.7 (Omni Calculator: 4.6).
WebsiteFreeWeb
4.7Visit
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