- Modular inverse of a matrix
This calculator finds modular inverse of a matrix using adjugate matrix and modular multiplicative inverse

- Modular Multiplicative Inverse
This calculator calculates modular multiplicative inverse of an given integer a modulo m

- Multiplication in columns
Calculator shows results of multiplying in columns, can be used to check answers

- Normal distribution
Plots the CDF and PDF graphs for normal distribution with given mean and variance.

- Normal force
This online calculator calculates strength of the normal force from the mass of the object, the gravitational field strength and the angle of the inclined surface measured from the horizontal.

- Numerical integration
To calculate definite integral by the rectangle method, trapezoid method, Simpson method or other Newton-Cotes quadrature methods.

Calculates the section flexure depth with pipe bender or bending machine to obtain given parameters.

- Ohm's law
This calculator determines current by voltage and resistance using ohm law

- One-variable function graph
This online calculator plots one-variable function graph given function formula and range of variable

- Parallel and perpendicular lines on a plane
This online calculator checks lines' slopes to see if they are parallel or perpendicular

- Petroleum product density
Petroleum product density conversion, according to GOST 3900-85

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

This online calculator turns power into torque and vise versa

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

- Probability of given number success events in several Bernoulli trials
Gives probability of k success outcomes in n Bernoulli trials with given success event probability.

- 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

- Quantity of heat
This calculator can find missing values in the relationship between heat and temperature: heat added or removed, specific heat, mass, initial temperature and final temperature

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

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

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