# Casio fx-31

The Casio fx-31 is a scientific calculator with 8 digits precision and algebraic logic. It has 27 functions, 35 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA batteries. The calculator was manufactured in Japan.
**Note:** First calculator bought at university

A sample of this calculator is held in the calculator.org collection.

## Facts at a glance:

Feature | Value |
---|---|

Type | Scientific |

Functions | 27 |

Keys | 35 |

Precision | 8 |

Logic | Algebraic |

Display type | VFD |

Length | 145mm |

Width | 84mm |

Thickness | 25mm |

Weight | 132g |

Power Consumption | 0.250000W |

Power Source | 2xAA batteries |

Country | Japan |

Year introduced | 1978 |

Year discontinued | 1980 |

## Replacements:

If you have a Casio fx-31 that is no longer working, you can first try replacing the 2xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.

We suggest the following current model as a replacement: