Math Tools
Calculators, visualizers, and mathematical utilities for students and teachers.
Our free online math tools help you calculate, convert, and visualize numbers instantly in your browser — no signup, no downloads, no ads. Whether you need to convert a decimal to a fraction, calculate a percentage, simplify a ratio, or find the mean of a dataset, every tool runs entirely in your browser and delivers instant results. Students, teachers, and professionals use these tools daily for homework, lesson planning, data analysis, and everyday math.
Fraction Visualizer
Show fractions as circle, bar, or grid diagrams. Compare two fractions side by side, see decimals, percentages, and equivalent fractions.
Percent Calculator
Calculate percentages three ways: X% of Y, what percent X is of Y, and the percentage change between two values.
Decimal to Fraction Converter
Convert any decimal to a simplified fraction with step-by-step breakdown. Supports repeating decimals like 0.333...
Fraction to Decimal Converter
Convert fractions and mixed numbers to decimals. Detects terminating vs repeating patterns and shows the repeating cycle.
Ratio Simplifier
Simplify 2-part or 3-part ratios, scale to a target value, and generate equivalent ratios.
Mean / Median / Mode Calculator
Enter a list of numbers and get mean, median, mode, range, sum, and more with a visual bar chart.
Statistics Calculators
Individual calculators focused on specific statistical measures.
Mean Calculator
Calculate the arithmetic mean (average) of any set of numbers with formula display and bar chart.
Median Calculator
Find the middle value of any dataset. Handles odd and even counts with highlighted sorted values.
Mode Calculator
Find the most frequently occurring value. Handles no mode, unimodal, and multimodal datasets.
Use Cases
- Students and homework — Check fraction conversions, verify percentage calculations, and understand statistics concepts with instant visual feedback.
- Teachers and lesson planning — Generate examples, demonstrate concepts with visual diagrams, and prepare worksheets using accurate calculations.
- Cooking and recipes — Convert between fractions and decimals for ingredient measurements, scale ratios for different serving sizes.
- Finance and budgeting — Calculate percentage changes, discounts, tips, tax rates, and growth rates quickly.
- Data analysis — Find mean, median, and mode for small datasets without opening a spreadsheet application.
- Test prep — Practice and verify statistics problems, fraction operations, and percentage calculations before exams.