Omni Calculator
Focus: calculator and conversions. Shares maths and finance with Calculator.net. Adds iOS and Android. Rated 4.6 (Calculator.net: 4.4).
WebsiteFreeWeb, iOS
4.6Visit
Website
Calculator.net
Around 200 free online calculators for money, health and maths.
Rating
4.4 / 5
Pricing
Free
Difficulty
Beginner
Works on
Web
Built with love by Shushant Lakhyani. Building bestproductivityresources.com
What is Calculator.net?
Calculator.net collects around 200 free calculators in one place, from mortgage, loan, retirement and income tax calculators to BMI, calorie and pace calculators, plus scientific, fraction, percentage, date and GPA tools. Every tool is free with no registration needed, so it is handy for quick sums and planning.
Pros: what Calculator.net does well
- Hundreds of calculators in one site
- Free with no sign-up
- Covers finance, health and maths
Cons: where it falls short
- Plain, text-heavy design
- Results are estimates, not professional advice
Who Calculator.net is for
Anyone who needs a quick calculation for money, health or schoolwork.
Who can skip it
People who need detailed spreadsheets or financial planning software.
Calculator.net alternatives
Not sold on Calculator.net? These do a similar job, and each card says what it has in common.
Calculator Soup
Focus: conversions. Shares calculators and maths with Calculator.net. Rated 4.5 (Calculator.net: 4.4).
WebsiteFreeWeb
4.5Visit
Savvy Trader
Focus: investing, trading and education. Shares finance with Calculator.net. Freemium (Calculator.net: Free). Rated 4.0 (Calculator.net: 4.4).
WebsiteFree planWeb
4.0Visit
Ghostfolio
Focus: investing, portfolio and self-hosted. Shares finance with Calculator.net. A web app, not a website. Rated 4.5 (Calculator.net: 4.4).
Web AppFreeWeb
4.5Visit
RapidTables
Focus: converters and reference. Shares calculators and maths with Calculator.net. Same 4.4 rating.
WebsiteFreeWeb
4.4Visit
Untools
Focus: mental models, frameworks and thinking tools. Also in Decision Making and Personal Productivity, like Calculator.net. Rated 4.6 (Calculator.net: 4.4).
WebsiteFreeWeb
4.6Visit
Free alternatives to Calculator.net
Want to spend nothing? These free picks cover similar ground.
Versus
Focus: product comparison, tech reviews and decision support. Also in Decision Making and Personal Productivity, like Calculator.net. Same 4.4 rating.
WebsiteFreeWeb
4.4Visit
DAREBEE
Focus: workouts, fitness and home exercise. Shares health with Calculator.net. Rated 4.7 (Calculator.net: 4.4).
WebsiteFreeWeb
4.7Visit
How I'd Build a One-Person Business If I Started Over in 2026
Focus: online business, solo founder and career. Also in Personal Productivity and Decision Making, like Calculator.net. A YouTube Video, not a website. Rated 4.6 (Calculator.net: 4.4).
YouTube VideoFreeWeb, Cross-Platform
4.6Visit
Math is Fun
Focus: education, worksheets and puzzles. Shares maths with Calculator.net. Rated 4.6 (Calculator.net: 4.4).
WebsiteFreeWeb
4.6Visit
Qalculate!
Focus: calculator, unit conversion and open source. Shares maths with Calculator.net. A desktop app, not a website. Adds Windows, Linux and Offline. Rated 4.6 (Calculator.net: 4.4).
Desktop AppFreeWindows, Linux
4.6Visit
Fava
Focus: accounting, budget and plain text. Shares finance with Calculator.net. A web app, not a website. Same 4.4 rating.
Web AppFreeWeb
4.4Visit
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