Calculators for Teachers & Students
Math and utility tools for classrooms, homework help, and lesson planning. Every calculator shows the formula and step-by-step math.
Percentage Calculator
Calculate percentages, percentage change, and what percent one number is of another — essential for grading and test scores.
Fraction to Decimal
Convert fractions to decimal form for students learning number representation and place value concepts.
Decimal to Fraction
Convert decimal numbers back to fractions to reinforce equivalence between number formats.
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers for history, math, and language arts lessons.
Age Calculator
Calculate exact age in years, months, and days — useful for enrollment cutoffs and age-appropriate grouping.
Percent of Calculator
Find what percentage one number is of another, or calculate a percent of a given value for math exercises.
Workflow Example
Use the percentage calculator to verify test score conversions (e.g., 37 out of 45 = 82.2%). Have students practice with the fraction to decimal converter to check their manual conversions, then reverse the process with the decimal to fraction tool. Each calculator shows the formula so students can verify their work step by step.