Calculator catalog
Choose a category or search by quantity, component or engineering topic.
Found 82 calculators
Circle area
Calculates circle area from diameter.
Circle circumference
Calculates circle circumference from diameter.
Annulus area
Calculates annulus area from outer and inner diameters.
Rectangle area
Calculates rectangle area from width and height.
Triangle area
Calculates triangle area from base and height.
Trapezoid area
Calculates trapezoid area from two parallel sides and height.
Cylinder volume
Calculates cylinder volume from diameter and length.
Hollow cylinder volume
Calculates hollow cylinder volume from outer diameter, inner diameter, and length.
Sphere volume
Calculates sphere volume from radius.
Cone volume
Calculates cone volume from radius and height.
Mass from volume and density
Calculates mass from volume and density.
Percentage of value
Calculates the part, percent, or whole from part = percent * whole / 100.
Percentage change
Calculates percentage change, old value, or new value.
Ratio from two values
Calculates the ratio a / b or the missing value from a simple quotient.
Average of two numbers
Calculates the arithmetic average of two numbers or the missing number.
Proportion solver
Solves the missing value in the proportion a / b = c / d.
Unit rate
Calculates unit rate, quantity, or time from rate = quantity / time.
Decimal and common fraction converter
Converts a finite decimal notation to a reduced common fraction and calculates a fraction's decimal value.
Fractional and decimal inches converter
Rounds a length to the nearest standard inch fraction and reports the rounding error.
Power calculator
Calculates the power result, base, or exponent.
Root calculator
Calculates the root, original value, or root degree.
Logarithm calculator
Calculates the logarithm, value, or logarithm base.
Arithmetic sequence nth term
Calculates the nth term, first term, common difference, or term number of an arithmetic sequence.
Geometric sequence nth term
Calculates the nth term, first term, ratio, or term number of a geometric sequence.
Direct variation
Calculates y, coefficient, or x from y = k * x.
Inverse variation
Calculates y, coefficient, or x from y = k / x.
Linear interpolation
Calculates y between two points using linear interpolation.
Bilinear interpolation
Calculates a value inside a rectangle from four corner values using bilinear interpolation.
2x2 linear system
Solves a simple system of two linear equations with two unknowns.
3D vector magnitude
Calculates the magnitude of a 3D vector from three components.
3D vector dot product
Calculates the dot product of two 3D vectors.
Angle between 3D vectors
Calculates the angle between two non-zero 3D vectors.
Trapezoidal integration from three points
Calculates a simple trapezoidal-rule integral for three equally spaced points.
Degrees to radians
Converts an angle from degrees to radians and back.
Radians to degrees
Converts an angle from radians to degrees.
Sine in a right triangle
Calculates sine, the opposite side, the hypotenuse, or the angle.
Cosine in a right triangle
Calculates cosine, the adjacent side, the hypotenuse, or the angle.
Tangent in a right triangle
Calculates tangent, the opposite side, the adjacent side, or the angle.
Triangle area from two sides and angle
Calculates area, side a, side b, or included angle from area = 0.5 * a * b * sin(C).
Law of sines
Calculates a side or angle from a / sin(A) = b / sin(B).
Law of cosines
Calculates side c or angle C from c² = a² + b² - 2ab cos(C).
Z-score
Calculates z-score, value, mean, or standard deviation.
Variance from standard deviation
Calculates variance or standard deviation from variance = standardDeviation^2.
Standard deviation from variance
Calculates standard deviation from variance.
Coefficient of variation
Calculates coefficient of variation, standard deviation, or mean.
Standard error
Calculates standard error, standard deviation, or sample size.
Normal margin of error
Calculates margin of error, z-score, standard deviation, or sample size.
Mean confidence interval
Calculates the margin and lower and upper mean interval limits from a supplied z value.
RMS of three values
Calculates the root mean square of three supplied values.
Weighted average
Calculates a simple weighted average from three values and three weights.
Probability complement
Calculates complement probability or probability.
Odds from probability
Calculates odds or probability from odds = p / (1 - p).
Probability from odds
Calculates probability from non-negative odds.
Linear equation ax + b = 0
Calculates the solution, coefficient a, or coefficient b for ax + b = 0.
Linear equation ax + b = c
Calculates the solution or one component of ax + b = c.
Quadratic equation real roots
Calculates the discriminant and two real roots of ax^2 + bx + c = 0.
2x2 linear system
Solves a 2x2 linear system using Cramer's rule.
Basic exponential equation
Calculates the solution or one parameter of a * b^x = c.
Rectangle perimeter
Calculates rectangle perimeter from width and height.
Triangle area from base and height
Calculates triangle area from base and height.
Triangle area by Heron's formula
Calculates semi-perimeter and triangle area from three sides.
Arc length
Calculates arc length from radius and angle after converting the angle to radians.
Circle sector area
Calculates circle sector area from radius and angle in radians.
Circle segment area
Calculates circular segment area from radius and central angle in radians.
Regular polygon area
Calculates regular polygon area from side count and side length.
Hexagon area
Calculates regular hexagon area from side length.
Slot area
Calculates obround slot area from straight length and width.
Bolt circle chord length
Calculates the chord distance between adjacent holes on a bolt circle.
Simple sheet metal flat length
Simple flat length calculator from two flanges and bend allowance.
Chamfer length from offsets
Calculates chamfer length from two perpendicular offsets.
Cube volume
Calculates cube volume from side length.
Cuboid volume
Calculates cuboid volume from length, width, and height.
Cone frustum volume
Calculates cone frustum volume from two radii and height.
Cone frustum lateral surface area
Calculates cone frustum lateral surface area from two radii and height.
Horizontal cylindrical tank volume
Calculates liquid volume in a straight horizontal cylinder from fill height and circular-segment area.
2D distance
Calculates the distance between two points in a plane.
2D midpoint
Calculates midpoint coordinates between two points.
2D slope
Calculates the slope of a line through two points.
Bolt circle coordinates
Calculates x and y coordinates for a bolt-circle hole from radius, hole count, index, and start angle.
Safe CAS engine
Bounded symbolic algebra engine with a safe AST, exact arithmetic and explicit messages for unsupported cases.
General symbolic solving
Polynomial equation solving through degree four with exact results where available, complex approximations and verification.
Advanced equation systems
Linear systems up to 12 unknowns and controlled nonlinear systems up to 6 unknowns with residuals.