Math Calculators
Free math calculators — accurate, fast, and free of clutter.
3 Tools100% FreeNo sign-up
Percentage Calculator
Solve percent of, percentage change, and what-percent questions instantly — plus the stacked-discount trap that catches almost every shopper.
Percent of a numberPercentage changeWhat percent
Calculate now Scientific Calculator
Trig, logarithms, and memory, with the DEG/RAD setting most wrong answers trace back to.
TrigonometryLogarithmsMemory functions
Calculate now Fraction Calculator
Add, subtract, multiply, and divide fractions with the common denominator step shown, because that is where most errors start.
All four operationsCommon denominator shownSimplification
Calculate now About math calculators
Each of these uses a verified, standard formula for its category — nothing invented, nothing rounded further than the underlying math requires.
Accurate results
Every calculator uses published, checkable formulas.
Easy to use
A simple interface with results as you type.
Free forever
No registration, no hidden fees.