Cents Detune Calculator
Measure pitch difference between two frequencies.
Your inputs
Calculation results
Formula & assumptions
Cents = 1200 log₂(measured/reference).
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using Cents Detune Calculator
Measure pitch difference between two frequencies.
- Enter reference frequency, measured frequency using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Reference frequency: 440 hertz Measured frequency: 442 hertz Pitch difference · cents: 7.851415 Pitch difference · semitones: 0.07851415 Frequency difference · hertz: 2
Questions & answers
What does Cents Detune Calculator calculate?
Measure pitch difference between two frequencies.
Which units should I enter?
Reference frequency uses hertz. Measured frequency uses hertz. Convert values to these units before calculating.
Which formula does it use?
Cents = 1200 log₂(measured/reference).
What does the included example show?
Reference frequency: 440 hertz; Measured frequency: 442 hertz. Result: Pitch difference · cents = 7.851415; Pitch difference · semitones = 0.07851415; Frequency difference · hertz = 2.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
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