- Area de la Sombra de un Objeto
El área de la sombra se refiere a la de un objeto cuadrado o rectangular.

- Expressing length through different units
Calculator expresses a given length through the different units.

- Film calculator
Calculation of the film segment duration in frames, hours, minutes, seconds.

- Golden ratio
This calculator determines proportions according to golden ratio

- Imperial to Metric and Metric to Imperial measures of length converter
- Nautical measurement units
Nautical mile, sea mile, cable

It's required to produce a mesh with predetermined length and width, roughly square meshes from tape with predetermined width. It is necessary to calculate the total length of the tape.

- Relations between the mass, the length, the width and the area density (surface density) of the fabric
This online calculator calculates the mass of the fabric given the length, the width and the area density (surface density); the length of the fabric given the mass, the width and the area density; the width of the fabric given the mass, the length and the area density; the area density given the mass, the length and the width

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

- Side of regular polygon from polygon area
Calculates the side length of regular polygon given the area of the regular polygon and number of sides

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

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

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