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- Compass, magnetic and true course.
Calculates true, magnetic and compass direction(course, bearing) by given direction, magnetic declination and deviation.

- Compound interest
This calculator computes compound interest

- Compound interest. Arbitrary payment
Compound interest calculator with the possibilityto set all the parameters of the compound interest formula

- Conversion between imperial and metric units of area
These calculators convert imperial to metric and metric to imperial units of square

- Conversion between two positional numeral systems
This calculator converts number from one numeral system to another, given both system's bases

- Conversion from decimal numeral system
This calculator converts given decimal value to other positional numeral system

- Conversion of decimal number to other notations
This calculator converts decimal number to binary, hexadecimal and octal notations

- Conversion of fractional numbers between numeral systems
This online calculator helps to convert fractional number in one numeral system to fractional number in other numeral system.

- Conversion of pounds into inches
Conversion of old pounds artillery caliber into more modern inches and millimeters

- Converting degrees to radians
Converts radians to degrees, minutes and seconds

- Count the number of words
The calculator counts word number in a given text. It can be used for rough calculation of translation cost. Can be used for word number calculation in software resources.

- Counting pipes from the end face
The approach to the calculation of the number of nested circles of smaller radius at a known length of the describing circle of a larger radius. Created by user request

- Course angle and the distance between the two points on loxodrome (rhumb line).
Calculation of a distance on loxodrome (rhumb line) and course angle (azimuth) between two points with a given geographical coordinates.

- Course angles and distance between the two point on the orthodrome(great circle)
Calculates the distance between two point of the Earth specified geodesic (geographical) coordinates along the shortest path - the great circle (orthodrome). Calculates the initial and final course angles and azimuth at intermediate points between the two given.

- Cylindrical tank volume
Cylindrical tank volume

- Density of oil
Recalculation of density of oil for different temperature and pressure values. Formulas are taken from Russia's GOST R 8.610-2004. "State system for ensuring the uniformity of measurements. Density of oil. The tables for recalculation" standard

- Derivative calculator
Online calculator which determines first derivative of a function

- Determining air humidity with psychrometric method
- 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.

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