- Dew point
This calculator determines dew point from given temperature and relative humidity of air

- Digital image size in pixels and photo print size
This article is about relation between image size in pixels and photographic print size. First, it recommends photographic print size for given digital image dimensions in pixels. Second, it finds resulting pixels per inch value for printed digital image with known linear and pixel dimensions.

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

- 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

Calculator expresses a given length through the different units.

- Ellipsoid
Calculates ellipsoid and spheroid volume and surface area.

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

- 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.

- 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

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.

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

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

- 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

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