- Direct observation error analisys
Calculates error of direct measurements for given measured value series and confidence interval.

- Distance calculator
- Doppler Effect in sound
Calculation of frequency and wavelength change for a moving source

- Ellipsoid
Calculates ellipsoid and spheroid volume and surface area.

- Email extractor
This online calculator parses emails from block of text using regular expression

Esta calculadora en línea encuentra dimensiones de pantalla - altura y ancho, dado el valor diagonal y proporción de aspecto.

- Energy measurement units
Energy unit converter (joules, kilowatt-hour, kilogram force per meter, horsepower per hour, kilocalories)

- Evaluating expressions
This online calculator substitutes a specific value for each variable, and performs the operations, evaluating the given expression.

- Expressing length through different units
Calculator expresses a given length through the different units.

- Extended Euclidean algorithm
This calculator implements Extended Euclidean algorithm, which computes, besides the greatest common divisor of integers a and b, the coefficients of Bézout's identity

- Factoring calculator
This calculator generates all pairs of factors for given integer.

Online calculator computes factorial of given positive integer (up to 170!)

- False position method
False position method - is a root-finding algorithm that uses a succession of roots of secant lines combined with bisection method to approximate a root of a function f.

- Fixed-point iteration method
This online calculator computes fixed points of iterated functions using fixed-point iteration method (method of successive approximations)

- Flag semaphore signals
The calculator converts english phrase to the flag semaphore signal sequence.

- Free fall. Distance passed task.
Solution of the falling body and distance passed tasks.

- Function approximation with regression analysis
This online calculator uses several simple regression models for approximation of unknown function given by set of data points.

- Gamma function
Calculation of the Gamma function using Lanczos approximation

- Gaussian elimination
The calculator solves the systems of linear equations using row reduction (Gaussian elimination) algorithm. The calculator produces step by step solution description.

- Gaussian elimination with fractions
This online calculator solves systems of linear equations using row reduction (Gaussian elimination) while retaining fractions on all calculation stages. At the end, it returns the results in two forms - as a floating point numbers and as a fractions (with numerator and denominator)

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