# All online calculators

- Distance calculator
Calculates distance between two geographic coordinates using haversine formula.

- Distance through the Earth
This calculator calculates the distance from one point on the Earth to another point, going through the Earth, instead of going across the surface.

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

- Double exponential smoothing
Description and example of the double exponential smoothing

- Earth Radius by Latitude (WGS 84)
This online calculator calculates Earth radius at given latitude using WGS 84 reference ellipsoid

- 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.

- Exponential Moving Average
Exponential Moving Average calculation by candles

- Exponential smoothing
Exponential smoothing theory

- 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

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

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

- 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.

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

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