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Audio Pitch Transposition Calculator
Find a transposed frequency from a reference tone, semitones and cents for tuning and playback preparation.
Reference frequency (Hz): 1–40000; Semitones: -48–48; Cents: -100–100
Inputs stay on this page and clear on refresh.
Audio Pitch Transposition Calculator
Reference frequency (Hz): 440 Semitones: 12 Cents: 0
- Target frequency (Hz)
- 880.000000
- Frequency ratio
- 2.000000
Equal temperament: ratio = 2^((semitones + cents/100)/12); target Hz = reference Hz × ratio. Positive shifts raise pitch; 100 cents equals one semitone. Example: 440 Hz +12 semitones = 880 Hz. Reference: 1–40000 Hz, integer semitones: −48–48, cents: −100–100. Results show six decimals and may lie outside the audible range. This calculates frequency only: it does not process audio, preserve duration or model an instrument’s tuning system.
Methodology
How it works
Equal temperament: ratio = 2^((semitones + cents/100)/12); target Hz = reference Hz × ratio. Positive shifts raise pitch; 100 cents equals one semitone. Example: 440 Hz +12 semitones = 880 Hz. Reference: 1–40000 Hz, integer semitones: −48–48, cents: −100–100. Results show six decimals and may lie outside the audible range. This calculates frequency only: it does not process audio, preserve duration or model an instrument’s tuning system.
Method and assumptions documented by Techrider.live
2026-10-15
Frequently asked questions
Does this change an audio file?
No. Use the frequency and ratio as a tuning or processor reference. Actual pitch shifting, time stretching and playback quality depend on your audio software.