Frequency Converter
Convert between hertz, kilohertz, megahertz, RPM, wavelengths, and specialized frequency measurements. Professional tool for engineers, scientists, and audio professionals.
Frequency conversion involves understanding oscillations, cycles, and periodic phenomena across various domains. This comprehensive guide covers all aspects of frequency measurement systems used in electronics, physics, and engineering.
Basic Concepts
- • Frequency = 1 / Period
- • Measured in Hertz (Hz)
- • Angular frequency = 2π × frequency
Applications
- • Electronics and circuits
- • Audio and acoustics
- • Radio and communications
Frequency Domains
Audio Range
20 Hz to 20 kHz - Human hearing range
- • Bass: 20-250 Hz
- • Midrange: 250 Hz-4 kHz
- • Treble: 4-20 kHz
Radio Spectrum
3 kHz to 300 GHz - Radio communications
- • AM Radio: 535-1605 kHz
- • FM Radio: 88-108 MHz
- • WiFi: 2.4/5 GHz
Measurement Standards
SI Base Unit
The hertz (Hz) is the SI unit for frequency, defined as one cycle per second. It's named after Heinrich Hertz, who proved the existence of electromagnetic waves.
Precision Standards
Atomic clocks use cesium-133 transitions (9,192,631,770 Hz) as the time standard, providing extremely precise frequency references for scientific and technological applications.
Frequency Prefixes
Rotational Conversions
Angular Frequency
Electronics
- • Clock signal design
- • Filter specifications
- • Oscillator circuits
- • Signal processing
Audio Engineering
- • Equalizer settings
- • Crossover design
- • Sampling rates
- • Acoustic analysis
RF Engineering
- • Antenna design
- • Channel allocation
- • Modulation schemes
- • Spectrum analysis
Mechanical
- • Motor speed control
- • Vibration analysis
- • Pump operations
- • Turbine monitoring
Audio Frequencies
Power & Industrial
Radio & Communications
What's the relationship between frequency and wavelength?
Frequency and wavelength are inversely related: f = c/λ, where c is the speed of light (299,792,458 m/s). Higher frequencies have shorter wavelengths, and vice versa.
How do I convert RPM to Hz?
Divide RPM by 60 to get Hz. For example, 1800 RPM ÷ 60 = 30 Hz. This is useful for motor speeds, turbines, and rotating machinery analysis.
Why are there different power grid frequencies worldwide?
Historical reasons led to 50 Hz (Europe, Asia) and 60 Hz (Americas) standards. 60 Hz provides slightly better motor performance, while 50 Hz is more efficient for transmission.
What's the difference between angular frequency and regular frequency?
Angular frequency (ω) is measured in radians per second, while regular frequency (f) is in cycles per second (Hz). The relationship is ω = 2πf. Angular frequency is commonly used in physics and engineering calculations.