Math tools
A focused collection of math tools that run entirely in your browser. The fraction calculator handles addition, subtraction, multiplication, division, and simplification and shows the step-by-step working so the result can be checked or learned from. The Roman numeral converter translates between Arabic numbers and Roman numerals from 1 to 3,999, with a reference table of subtractive pairs.
Each tool uses plain JavaScript arithmetic so calculations are exact at common precision and instant as you type. There is no account, no installation, and no analytics. The same tools work on a phone or laptop and produce identical results.
Read the complete math tools guide
How to use math tools
- Choose the tool you need from the list above.
- Enter your values in the input fields provided.
- Results and step-by-step working appear instantly as you type.
- Copy the result or use the reference tables for further guidance.
In-browser math tools vs the alternatives
| Approach | Privacy | Cost | Best for |
|---|---|---|---|
| In-browser (this site) | All local | Free | Quick fraction work, Roman numeral lookups, learning the steps |
| Hosted math services | Server-side | Free tier + paid | Symbolic algebra, graphing, multi-step problem walkthroughs |
| Calculator app or paper | All local | Free | Quick arithmetic, no copy-paste needed |
For everyday fraction arithmetic and Roman numeral conversion, the in-browser tools are instant and free. For symbolic algebra, calculus, or step-by-step solutions to complex word problems, a hosted computer-algebra service is still the better pick.
When to use these tools
- Use the fraction calculator for homework, cooking ratios, or carpentry measurements. The step-by-step output makes it useful for learning how the operation works rather than just getting an answer.
- Use the Roman numeral converter for dates on monuments and books, copyright marks (MCMLXIV), and outline numbering. The reference table covers subtractive pairs like IV, IX, XL, XC, CD, and CM.
- For percentage operations, the dedicated percentage calculator covers the three most common operations. For unit conversion math, the unit converter handles length, weight, temperature, speed, and volume.
Frequently asked questions
- Are these math tools free?
- Yes. All tools are completely free to use. No account, no payment, no registration required.
- Do I need to create an account?
- No. Open any tool and use it immediately. Nothing is stored or logged.
- How do these tools work?
- All calculations run locally in your browser using JavaScript. No data is sent to our servers.
- What math tools are available?
- The collection currently includes a fraction calculator (add, subtract, multiply, divide, and simplify fractions) and a Roman numeral converter (convert between Arabic numbers and Roman numerals).