What is RapidTables?
RapidTables is a quick reference site that collects calculators, converters and lookup tables in one place. It leans technical, with whole sections on electrical calculation, number conversion and web colours, alongside everyday tools for grades, percentages and mortgages.
It is built for quick lookups: pick a category, open a page and get the answer or the table you came for. The tools section also has handy small utilities such as an online notepad, an HTML editor and an ASCII table, and it works without an account.
Main Features
- Maths, grade, financial and time calculators
- Electrical, lighting and wire calculators
- Converters for length, weight, temperature, energy, power and voltage
- Number, colour and image conversion
- RGB colour codes and an ASCII table
- Online notepad, HTML editor and HTML viewer
- Text, PDF and web development tools
How to Get Started with RapidTables
- Go to rapidtables.com.
- Choose a category such as Calculators or Conversion, or use the search.
- Open the tool or table you need.
- Enter your values and read the result.
RapidTables Pricing
RapidTables is free to use. It needs no account, and the site lists no paid plan. It is supported by ads.
Who Should Use It?
- Electronics hobbyists and electrical students
- Web designers looking up colour codes
- Students working with number systems and percentages
- Anyone who needs a quick unit conversion
RapidTables Alternatives
- Calculator.net is a free library of calculators for finance, health and maths.
- Desmos is a free graphing and scientific calculator for maths work.
- Regex101 tests and explains regular expressions.
Frequently Asked Questions
Is RapidTables free?
Yes. It is free to use, with no account and no paid plan listed.
What kinds of tools does it have?
Calculators, unit and number converters, reference tables, and small utilities such as an online notepad.
Does it cover electrical calculations?
Yes. It has sections for electrical, lighting and wire calculators, plus energy, power and voltage conversions.
Can I look up colour codes?
Yes. It has RGB colour code tables and a web colours section.