*I am sorry but the calculator is no longer functional. I am leaving this page up because some of the frequency and scale length information below might still be helpful to some of you. -Dan. 2020-12-14.*

**Original Length**is the scale length used to determine tension. You can use any units (inches, mm, cm) but don’t enter the units into the form, only the value.**New length**should be in the same units as above. This should be the actual scale length of the instrument you want to put the strings on.**Old Hz**is the original pitch frequency in Hz for the open string note as measured when the tension was determined.**Tension**can be entered in any units. This is a measure of force and usually is given in pounds (lb) or kg^{1}. If you don’t know the original tension, the default value of 100 is used. This then gives a result as percent (%) of the original.**New Hz**is the frequency in Hz of the open note you wish to change the tuning to for the string.

You can use the following table to find the appropriate **string frequency in Hz** for the notes. See my article on Ukulele Strings, Tunings and Technology for a table of tunings and frequencies.

Hz | Note | Guitar String | Ukulele / Tuning |
---|---|---|---|

659.2 | E | ||

622.2 | D# | ||

587.3 | D | ||

554.3 | C# | ||

523.2 | C | ||

493.8 | B | ||

466.1 | A# | ||

440 | A | 1st, Std C | |

415.3 | G# | ||

392 | G | 4th, Std C | |

370 | F# | ||

349.2 | F | ||

329.6 | E | 1st | 2nd, Std C |

311.1 | D# | ||

293.6 | D | ||

277.2 | C# | ||

261.6 | C | middle C | 3rd, Std C |

246.9 | B | 2nd | |

233.1 | A# | ||

220 | A | ||

207.6 | G# | ||

196 | G | 3rd | 4th Low G, Std C |

185 | F# | ||

174.6 | F | ||

164.8 | E | ||

155.6 | D# | ||

146.8 | D | 4th | |

138.6 | C# | ||

130.8 | C | ||

123.5 | B | ||

116.5 | A# | ||

110 | A | 5th | |

103.8 | G# | ||

98 | G | ||

92.5 | F# | ||

87.3 | F | ||

82.4 | E | 6th | |

77.78 | D# | ||

73.42 | D | ||

69.3 | C# | ||

65.41 | C |

The following table gives some **typical scale lengths** of some fretted instruments.

Scale Length (inches) | Example |
---|---|

13.6 | Standard Soprano Ukulele |

14.74 | Concert Ukulele |

17 | Tenor Ukulele |

20.1 | Baritone Ukulele |

23.5 | Gibson Byrdland |

24 | Fender Mustang |

24.6 | Gretch |

24.74 | Gibson |

25 | Paul Reed Smith |

25.5 | Fender (Stratocaster) |

25.6 | Classical Guitar (650 mm) |

Something seems to be missing. Where does one enter the data and where does one find the calculated tension? All I see are [jazzy form=”string_tension”], two tables and nowhere to enter anything.

I’m investigating using fluorocarbon fishing line for ukulele strings.

Thanks

The page with the tension calculator was written over 8 years ago. The plugin that I used to do the calculations is no longer supported. I apologize for not correcting this sooner. I’ve added a notice on the page that the calculator no longer works. The frequency and scale length tables are still useful.