Math calculators
These are the calculations people most often second-guess: which number is the base in a percentage, or how to find a common denominator — plus the algebra, statistics and geometry that homework and work projects throw at you. Every result shows the formula and the steps, so you can check the work or copy the method, and each page names the textbook it follows.
Arithmetic
- Percentage CalculatorPercent of a number, percent of total, percent change
- Fraction CalculatorAdd, subtract, multiply and divide fractions with steps
- Scientific CalculatorTrig, logs, powers and factorials in degrees or radians
- Rounding CalculatorDecimal places, nearest ten or hundred, significant figures
- Ratio CalculatorSolve proportions and simplify ratios
- GCF & LCM CalculatorGreatest common factor and least common multiple