Math
Square Footage Calculator
Calculate the area of a rectangular room or lot in square feet, meters, and acres.
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Percentage
Percentages made easy
% Change
Increase or decrease
Aspect Ratio
Resize keeping ratio
Average & Mean
Mean, median, range
Standard Deviation
Population & sample SD
Quadratic Equation
Solve ax² + bx + c = 0
Circle
Area, circumference & diameter
Exponent
Raise a number to a power
GCD & LCM
Greatest common divisor & LCM