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  • Spherical sector

    Calculates surface area and volume of Spherical sector by radius and height

  • 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.

  • Symbol frequencies table

    This online calculator builds symbol frequency table for a given message

  • Tank volume

    Calculator computes tank volume given its length, diameter and walls depth. Created by user's request.

  • Telecommunications traffic, Erlang

    The calculator gives telecom traffic in Erlang for given time span and total call duration.

Sunrise and sunset time

This online calculator is intended for sunrise and sunset time calculation for given place and date. The calculator algorithm is obtained from the great book of Oliver Montenbruck and Thomas Pfleger "Astronomy on the Personal Computer".

PLANETCALC, Sunrise and sunset time

Sunrise and sunset time

°

°

Local time - GMT ( in hours)

Vigenère cipher

Calculator encrypts entered text by using Vigenère cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.

PLANETCALC, Vigenère cipher

Vigenère cipher