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PlanetCalc
PlanetCalc catalogs online calculators for topics including dates, time, science, engineering and everyday conversions.
About PlanetCalc
PlanetCalc is a catalog of online calculators that run in a web browser without software installation. The homepage lists 1003 calculators grouped into three main sections — Life, Professional and Study — with subcategories such as Calendar, Date and Time, Health, Computers, Engineering, Finance, Image Processing, Navigation, Statistics, Telecommunications, Units Converters, Cryptography, Astronomy, Chemistry, Math and Physics.
Key features
- Catalog of 1003 calculators organized by topic and category
- Sections for Life, Professional and Study subjects
- Subcategories span dates, finance, engineering, math, chemistry and physics
- Interface offered in English, German, Spanish, French, Portuguese, Russian and Chinese
- Users can suggest ideas for new calculators
- Latest calculators, requests and comments listed on the homepage
Best for: Students, researchers and professionals who need quick web-based calculations across science, engineering, finance, dates and everyday conversions.
Good for
- Large, categorized catalog covering many disciplines from a single site
- Calculator interface runs in a browser with no software installation
- Accepts user suggestions for new calculators, with team members responding to requests
Watch out for
- Pricing is not stated on the homepage
- A login option appears, but the benefits of an account are not described
- Some calculators address narrow or region-specific topics, such as sole-proprietor tax in Russia
PlanetCalc at a glance
- Website
- planetcalc.com
- Category
- Research & Data › Research & Study Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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PlanetCalc FAQ
How many calculators does PlanetCalc list?
The homepage states there are 1003 calculators in total.
Can I ask for a calculator that does not exist yet?
Yes. Users can suggest an idea, and if a description of what needs to be calculated is left, a team member responds and can produce a calculator for that request.
What languages is the site available in?
The homepage lists German, English, Spanish, French, Portuguese, Russian and Chinese.
Is something wrong or out of date?
Tell us and an editor will check it.
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