Classroom mathematics
Percentages, ratios, fractions, scientific expressions, and area checks for worked examples and homework review.
Education tools
Calculators and converters for teaching, studying, and checking work
A focused Calxo AI toolkit for teachers, tutors, students, and learning-resource editors who need transparent math, formula, and measurement tools without sign-in.
8featured tools
3teaching workflows
0accounts required
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Featured tools
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Percentage Calculator
Calculate percent of a number, percent change, discounts, grades, and reverse percentages with clear base-value formulas
Classroom mathematics>Scientific Calculator
Evaluate scientific expressions with trigonometry, logarithms, roots, powers, constants, factorials, and degree or radian modes
Classroom mathematics>GPA Calculator
Calculate a weighted GPA from course credits and grade points on a 4.0 scale
Classroom mathematics>Ratio Calculator
Simplify ratios and compare two quantities with a clean reduced form
Classroom mathematics>Fraction Calculator
Add, subtract, multiply, or divide fractions and see the simplified result
Classroom mathematics>Area Calculator
Calculate rectangular area and perimeter for rooms, plots, walls, and surfaces
Construction and home estimates>Unit Converters
Convert length, weight, temperature, area, volume, and speed units instantly
Measurement and conversion>Study Hours Planner
Plan daily study hours from total hours needed and days available
Classroom mathematicsWorkflows
Choose tools by use case
Science and measurement
Unit conversion and area tools for labs, worksheets, dimensional checks, and quick measurement examples.
Student planning
Grade and study-time tools for students checking course standing or planning exam preparation.
Trust layer
Clear enough to cite, light enough to use
Formula visibility
Featured calculators link to formula or methodology notes where the calculation has a defined method.
Student-safe workflow
Core tools work without student names, school accounts, phone numbers, or classroom sign-in.
Share exact resources
Use this page for a broad classroom list, or share the exact calculator when a lesson focuses on one topic.
Reference links
Helpful supporting resources
Formula LibraryStructured formula references and citations for calculators with public methodology.Unit-conversion widget packageReady-to-reference unit-converter and percentage embeds for education websites.Data DirectoryCSV and JSON reference files for formula, source, country, and catalogue review.
How it works
Open a tool, check the method, share the exact page
Start from a featured tool or workflow collection, then use the supporting notes when you need formulas, source context, widget details, or a page you can share with others.
Choose the calculator that matches the task
Review assumptions, formulas, or source notes
Share the exact page or embed where useful
FAQ
Common questions
Which page should I share with students or teachers?
Share this page when someone needs a broad set of classroom calculators, formula references, and measurement tools in one place.
Can I link directly to one calculator?
Yes. If a lesson or resource is about percentages, unit conversion, GPA, study time, or another specific task, link directly to that calculator.
Can students use these tools without an account?
Yes. The featured education tools are browser-based and do not require a Calxo account.