- Sphere
- Spherical cap and spherical segment
This calculator computes volume and surface area of spherical cap and spherical segment

- Student t-distribution
Calculates cumulative distribution function value and probability density function value for Student t-distribution. Quantile calculator evaluates Student quantiles for given probability and specified number of degrees of freedom.

- Surface area of a cube
- Tank volume
Calculator computes tank volume given its length, diameter and walls depth. Created by user's request.

This online calculator calculates the weight and the volume of the drop given the surface tension, diameter of the capillary tube, and density of the liquid

- Temperature scales
Conversion between different temperature scales

- The buoyant force
This calculator computes the buoyant force and weight of the liquid displaced, given the volume of body in water

- The diagonals of a parallelogram
Calculator computes the diagonals of a parallelogram and adjancent angles from side lengths and angle.

- The greatest common divisor and the lowest common multiple of two integers
This calculator finds the greatest common divisor (GCD) and the lowest common multiple (LCM) of two integers

- The greatest common divisor of two integers
This calculator determines the greatest common divisor of two integers using Euclidean algorithm

- The waves and the wind. Calculation of wave characteristics
Calculation of wave characteristics

This calculator calculates total volume as sum of volumes of entered rectangular parallelepipeds.

- The waves and the wind. Wave height statistical forecasting
Predicting the height of the waves depending on the wind strength

- Tips and tricks #5: How to show/hide input and output controls in a calculator
This article describes how to control visibility of input and output controls in a calculator

- Torus
Volume and surface area of torus.

- Total square
This calculator calculates total square as sum of squares of entered rectangles

- Traveling Wave Relationship
The relationship of the wave frequency, wavelength and propagation velocity.

- Triangle angles for given triangle sides
This calculator computes triangle angles for given triangle sides using cosine law

- Trigonometric functions
This online calculator computes the values of elementary trigonometric functions, such as sin, cos, tg, ctg, sec, cosec for an angle, which can be set in degrees, radians, or grads.

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