- Polygon area
Online calculator which calculates area of a polygon given lengths of polygon sides and diagonals which split polygon to nonoverlapping triangles

- Power into Torque and vise versa
This online calculator turns power into torque and vise versa

- Projection
Calculation of unknown parameters of projection using known parameters. Parameters are duration, maximum height, distance, initial velocity and angle.

- Proportion
This online calculator finds unknown member of proportion. Created by user's request

This online calculator computes pressure, cause by given mass over given surface in gravity field. Result is displayed using different units of pressure

- Random combination of numbers from specified range
This calculator randomly picks several numbers from specified range.

- Raoult's Second law and the freezing temperature.
Calculation of boiling point and crystallization (freezing) of non-electrolyte solutions.

- Rectangle area calculation by perimeter
Rectangle area calculation with known perimeter and aspect ratio

- Regular polygon area from circumcircle
Calculates the area of the circumcircle and of the regular polygon from radius of circumcircle and number of sides

- Regular polygon, number of sides and length of side from incircle and circumcircle radii
This online calculator finds number of sides and length of side of regular polygon given the radii of incircle and circumcircle

- Regular polygon. Incircle and circumcircle
This online calculator determines parameters of circumcircle and incircle of a regular polygon

Gives probability of k success outcomes in n Bernoulli trials with given success event probability.

- Relative humidity to absolute humidity and vise versa calculators
First calculator converts relative humidity to absolute humidity for given temperature and barometric pressure. Second calculator converts absolute humidity to relative humidity for given temperature and barometric pressure

- Root and power
This calculator outputs desired root and power of entered number

- Saturation vapour pressure
This online calculator computes saturation vapour pressure for given temperature and atmospheric (barometric) pressure

- Secant method
The secant method is a root-finding algorithm that uses a succession of roots of secant lines to better approximate a root of a function f.

- Second, third and other derivatives
Evaluates first, second third and other derivatives of a single argument function

- Shadow length
Gives a vertical object shadow length for given coordinates and time. Also calculates shadow growth during whole day.

- Side length of a right triangle
Calculates the side length of a right triangle from two other sides using Pythagorean theorem. Created by user's request

- Side length of a triangle
This calculator computes side length of a triangle given two sides and angle between them (law of cosines)

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