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

Area Converter This online calculator is designed to convert between different units of area. |

Angle in degrees to time units and vice versa This online calculator converts angle between degrees and time units (i.e. hours). |

PSAT/NMSQT Practice Tests Score Calculator This calculator helps you to score your official practice tests results. |

Universal High School GPA Calculator This online calculator lets you figure out your high school GPA. Even more, it provides you with editable conversion tables and weights, so you can tweak calculations in case you need it. |

Run-length encoding This online calculator compresses the entered string using the run-length encoding (RLE) method. |

Least Significant Bit steganography The first online calculator on this page uses a Least Significant Bit steganographic method to hide a message in a digital image. The second online calculator reveals the message hidden by the first calculator. |

Weighted grade calculator This online calculator calculates the weighted average of the grades entered with weights. For comparison, the average grade is also displayed. |

Sort and Remove: A String Sorting and Deduplication Calculator This calculator takes a list of strings as input and sorts them either in ascending or descending order based on the user's preference. Additionally, the calculator has an option to remove any duplicate strings in the input list before performing the sort. |

Grade Goal Calculator This online calculator allows students to input their current grades for each course and displays the current average. It then calculates the number of B's needed to reach a B, if the current average is below a B, as well as the number of A's needed to reach both a B and an A. |