Note Frequency Calculator
Calculate musical note frequency in Hz from note name and octave using equal temperament tuning.
What Is Note Frequency?
Every musical note vibrates at a specific frequency measured in hertz (Hz). In equal temperament tuning, A4 is defined as 440 Hz and every other note is derived from that reference.
Equal Temperament Formula
$$f = 440 \times 2^{\frac{n}{12}}$$Here \(n\) is the number of semitones from A4. C4 is about 261.63 Hz and A4 is exactly 440 Hz.
Related tools: Harmonic Series Calculator, Guitar String Tension Calculator, and Music Interval Calculator.
Frequently Asked Questions
What frequency is A4?
A4 in equal temperament is 440 Hz by convention.
What frequency is middle C?
Middle C (C4) is approximately 261.63 Hz.
What is equal temperament?
Equal temperament divides the octave into 12 equal semitones, each a factor of 2^(1/12) apart in frequency.
Does octave affect frequency?
Yes. Each octave up doubles the frequency. C5 is twice C4.
What is wavelength?
Wavelength is how far a sound wave travels in one cycle. At 20 °C, wavelength ≈ 343 / frequency in meters.
Related Tools
Hamster Power Calculator
Greater Than Or Less Than Calculator
Baby Eye Color Calculator
Truncate List
LESS Compiler
Glasgow Coma Scale Calculator
Car Jump Distance Calculator
Parallax Calculator
Popcorn Calculator
Generate Random ASCII
Annuity Payment Table
Pressure Converter
Random Scene Generator
Acceleration Converter
Love Calculator
Deadline Calculator
Allowable Blood Loss Calculator
Reactive Energy Converter
Kolakoski Sequence Generator
Cash Flow Margin Calculator
Recent Visits
Finance Calc Kit
Focused calculators on Finance Calc Kit for loans, compounding investments, contractor tax estimates, and reti...
Explore Finance Calc Kit