Frequency Converter

Convert between Hz, kHz, MHz, GHz, THz, RPM, RPS and wavelength

From:
To:
1000 Hz
Frequency to Wavelength
Wave speed m/s
Wavelength Result
1.0 m
Wavelength to Frequency
Wave speed m/s
299.792 MHz
From:
To:
1.0 Hz

What is Frequency?

Frequency is the number of occurrences of a repeating event per unit of time. It is measured in hertz (Hz), which is equal to one cycle per second. Higher frequencies are measured in kilohertz (kHz), megahertz (MHz), gigahertz (GHz), and terahertz (THz).

Why Convert Frequency Units?

Different fields use different frequency units. For example:

  • Audio frequencies are typically measured in Hz or kHz
  • Radio frequencies are measured in MHz or GHz
  • Computer processors operate in GHz
  • Light frequencies are measured in THz

Converting between these units helps in understanding and comparing frequencies across different applications.

Wavelength Relation

Wavelength (λ) and frequency (f) are inversely related through the wave speed (c):

λ = c / f or f = c / λ

Where:

  • λ = wavelength in meters
  • f = frequency in hertz
  • c = speed of the wave in meters per second

Example Conversions

Example Result
Convert 300 MHz to Hz 300,000,000 Hz
Convert 60 RPM to Hz 1 Hz
Convert 5 GHz to Wavelength (light) λ = 0.06 m (or 6 cm)
Convert 343 Hz with speed of sound λ = 1 meter (in air at 20°C)

What This Converter Helps With

This tool helps you convert between different frequency measurements used in everyday life and technical applications. Whether you're working with audio equipment, radio frequencies, computer hardware, or physics problems, this converter makes it simple to translate between units. If you're also working with related measurements, you might find our time conversion tools useful for understanding period and cycle durations.

Common real-life uses:

  • Audio equipment setup: Match speaker frequencies to amplifier specs
  • Wireless networking: Convert between Wi-Fi channel frequencies (2.4 GHz, 5 GHz)
  • DIY electronics: Calculate appropriate resistor/capacitor values for circuits. For deeper electrical work, you might need to determine values with an Ohm's Law calculator or explore electrical conductivity conversions.
  • Music production: Convert between musical note frequencies
  • Automotive: Convert engine RPM to Hz for diagnostic work
  • Physics homework: Solve wavelength and frequency problems

Simple Unit Explanations

  • Hz (Hertz): One cycle per second. Human hearing range: 20 Hz to 20,000 Hz.
  • kHz (Kilohertz): 1,000 Hz. Used for audio frequencies and older radio.
  • MHz (Megahertz): 1,000,000 Hz. FM radio, Wi-Fi channels.
  • GHz (Gigahertz): 1,000,000,000 Hz. Modern CPUs, 5G networks.
  • THz (Terahertz): 1,000,000,000,000 Hz. Infrared and light waves.
  • RPM (Revolutions Per Minute): How many full rotations in one minute. Car engines: 800-6000 RPM.
  • RPS (Revolutions Per Second): RPM ÷ 60. Useful for physics calculations.

Input Usage Guidance

For accurate conversions:

  • Enter numbers normally (use decimal points, not commas)
  • For very large numbers, use scientific notation: 3.6e9 = 3,600,000,000
  • Click unit buttons to select what you're converting FROM and TO
  • Use the wavelength tab for light/sound wave calculations
  • Try the "Common wave speeds" checkbox for quick sound/light setups

Mobile tip: The number pad will automatically appear on phones and tablets.

Everyday Mistakes to Avoid

  • Confusing Hz with kHz: 1 kHz = 1000 Hz (not 100 Hz)
  • Wave speed errors: Sound travels much slower than light (343 m/s vs 299,792,458 m/s). You can also compare this with an online speed converter for other types of velocity.
  • RPM to Hz: Remember 60 RPM = 1 Hz, not 60 Hz
  • Decimal placement: 2.4 GHz = 2,400 MHz, not 24 MHz
  • Negative frequencies: Frequency must be positive
  • Unit mismatches: Check if you're converting radio, audio, or rotational units
  • Wavelength units: Make sure wavelength input matches selected unit (meters, cm, etc.)
  • Speed of light: In materials other than vacuum, light slows down (use correct speed)

Mobile & Accessibility Notes

For mobile users:

  • All controls are touch-friendly with large tap areas
  • Results automatically update as you type
  • Dark mode saves battery on OLED screens
  • Works offline after initial load

Accessibility features:

  • High contrast mode available (dark/light toggle)
  • Keyboard navigation supported (Tab, Space, Enter)
  • Screen reader compatible labels
  • Clear visual feedback on selections

Quick Conversion Tips

Mental shortcuts:

  • MHz to kHz: Multiply by 1,000 (88 MHz = 88,000 kHz)
  • GHz to MHz: Multiply by 1,000 (2.4 GHz = 2,400 MHz)
  • RPM to Hz: Divide by 60 (1800 RPM = 30 Hz)
  • Light wavelength: 300 MHz ≈ 1 meter (in vacuum)

Common reference points:

  • AM radio: 530-1700 kHz
  • FM radio: 88-108 MHz
  • Wi-Fi: 2.4 GHz or 5 GHz
  • Human hearing: 20 Hz (low) to 20 kHz (high)
  • Idle car engine: 800-1000 RPM

Common Questions & Notes

Matching frequencies prevents equipment damage (like speakers), ensures wireless devices work together, helps tune musical instruments, and solves engineering problems. Wrong frequency units can lead to failed projects or damaged equipment.
Rotational frequency (RPM/RPS) measures how many times something spins. Regular frequency (Hz) measures any repeating event. They're mathematically related: 1 RPS = 1 Hz, and 60 RPM = 1 Hz.
Conversions use precise mathematical relationships with double-precision calculations. For most everyday uses, results are exact. For scientific work, always verify critical calculations with specialized tools. The speed of light used is 299,792,458 m/s (exact value).
Yes! This converter works perfectly on all devices: smartphones, tablets, laptops, and desktop computers. The interface adjusts automatically. No app installation needed - works directly in your browser.
Use wavelength conversion for: antenna design (radio waves), speaker placement (sound waves), lighting design (visible light), fiber optics, or any physics problems involving waves. The "Common wave speeds" button helps with light and sound calculations.
Accuracy & Usage Note

This converter provides mathematically precise unit conversions suitable for most educational, hobbyist, and professional applications. For critical scientific, medical, or engineering applications requiring certified accuracy, consult specialized measurement tools.

Device Compatibility: Works on all modern browsers (Chrome, Firefox, Safari, Edge) and operating systems (Windows, macOS, iOS, Android, Linux). Updated November 2025.