Frequency Converter – Hz, kHz, MHz, GHz, RPM & 10+ Units

Frequency is number of oscillations/cycles per unit time. SI unit: Hertz (Hz) = 1 cycle/second. F = 1/T (inverse of period). Used in physics, electronics, telecommunications, audio, and mechanical engineering to measure waves, vibrations, oscillations.

Divide hertz by 1,000 to get kilohertz. Example: 5,000 Hz ÷ 1,000 = 5 kHz. Reverse: kHz × 1,000 = Hz. Simple metric conversion: 1 kHz = 1,000 Hz (k = kilo = thousand).

Divide kilohertz by 1,000 to get megahertz. Example: 500 kHz ÷ 1,000 = 0.5 MHz. Reverse: MHz × 1,000 = kHz. Used in radio & wireless: AM radio ~100-1,600 kHz; FM radio ~88-108 MHz; cellular ~700-6,000 MHz.

Hz = cycles per second. RPM = rotations per minute (mechanical). Conversion: RPM ÷ 60 = Hz, or Hz × 60 = RPM. Example: 3,600 RPM motor = 60 Hz. Used in different fields (electrical vs. Mechanical).

WiFi: 2.4 GHz & 5 GHz bands (2,400-2,500 MHz & 5,000-6,000 MHz). Cellular: 700-800 MHz (4G), 2-4 GHz (LTE), 3-6 GHz (5G). Microwave ovens: 2.45 GHz (same as WiFi 2.4 GHz band!).

Frequency × Wavelength = Speed of Wave. C = f × λ (light: c = 3 × 10⁸ m/s). Higher frequency = shorter wavelength. Example: 1 GHz radio wave = 30 cm wavelength. Critical for antenna design & RF engineering.

Period (T) = time for one cycle. Frequency (f) = cycles per second. Relationship: f = 1/T, or T = 1/f. Example: 50 Hz power = 20 ms period (1 ÷ 50 = 0.02s). Inverse relationship.

Human hearing: 20 Hz - 20 kHz (audio spectrum). Deep bass: 20-60 Hz. Midrange: 250 Hz - 4 kHz (speech intelligibility). Treble: 4-20 kHz. Ultrasonic: > 20 kHz (inaudible to humans, used in dog whistles, medical imaging).

Frequency at which a system oscillates most efficiently (amplitude maximized). Bridge resonance: 0.5-2 Hz causes collapse. Radio tuning: station frequency = resonant frequency of circuit. Glass breaking by sound: match resonant frequency. Critical in mechanical & electrical design.

5G operates in multiple bands: Sub-6 GHz (600 MHz - 6 GHz) for coverage, mmWave (24-100 GHz) for speed. 5G mmWave = 28 GHz, 39 GHz (USA). Millimeter wave = shorter wavelength = more bandwidth = faster but shorter range.

RF engineers (radio frequency design), telecommunications technicians (cell towers), audio engineers (sound mixing), electronics technicians (circuit troubleshooting), antenna designers, telecommunications, wireless networks, power engineers (50/60 Hz AC systems).

Nyquist frequency = half the sampling rate. To accurately digitize a signal, sample rate must be > 2 × signal frequency. Example: CD audio sampled at 44.1 kHz captures frequencies up to 22.05 kHz (covers human hearing 20 kHz max). Prevents aliasing.

Frequency (Hz) = Speed of light (m/s) ÷ Wavelength (m). For visible light: f = 3×10⁸ ÷ wavelength. Example: Red light ~700 nm = 4.3 × 10¹⁴ Hz. Used in optics, photonics, RF design.

Peak frequency = highest frequency component in signal. Average frequency = mean of all frequencies (weighted by amplitude). Used in signal processing, audio analysis, spectrum analyzers. For periodic signals: peak frequency = fundamental frequency.

Harmonics are integer multiples of fundamental frequency. Fundamental: f; 2nd harmonic: 2f; 3rd: 3f, etc. Guitar string ~440 Hz (A4) produces 880 Hz (2nd), 1,320 Hz (3rd) harmonics. In power systems: 50 Hz fundamental creates 100 Hz, 150 Hz harmonics (electrical distortion).

Multiply terahertz by 1,000 to get gigahertz. Example: 1 THz × 1,000 = 1,000 GHz. THz used for infrared, submillimeter waves, optical frequencies. Reverse: GHz ÷ 1,000 = THz (T = tera = trillion).

Yes. Uses standard metric conversions (Hz, kHz = ×1000; MHz, GHz, THz follow same pattern). RPM conversion: RPM ÷ 60 = Hz (standard mechanical-electrical relationship). Wavelength calculated using c = 3 × 10⁸ m/s (speed of light vacuum). Accurate for engineering & physics.