# Transmission belt length and enclosing area

On this page formulas and a tool to calculate the length of a transmission belt and its enclosing area, given the radiuses of the two circles and the distance between the centers of the circles.## Formulas

Formulas and derivation (LaTeX source)## Tool

Both . and , can be used as decimal separator.r_{1}: | |

r_{2}: | |

d: | |

Length: | |

Area: |