Frequency Converter
Convert frequency between hertz and its multiples, plus revolutions per minute for rotating machinery.
How it works
Frequency counts events per second, and the hertz is exactly that — one cycle per second. The prefixes are plain powers of ten, so the conversions are simple decimal shifts.
Revolutions per minute is the same idea measured per minute instead, so 60 rpm is 1 Hz. Rotating machinery is quoted in rpm because the numbers land in a readable range; electronics uses hertz for the same reason at the other end of the scale.
Frequency and wavelength are inversely related through wave speed, so a higher frequency always means a shorter wavelength. The wavelength calculator handles that conversion directly.
The formula
MHz → Hz
Hz = MHz × 1,000,000
Hz → MHz
MHz = Hz ÷ 1,000,000
Any pair in this family
result = value × (factor of source ÷ factor of target)
Every unit is defined against the hz, so any combination converts in one step.
Worked examples
| Scenario | Working | Result |
|---|---|---|
| 1 MHz to hertz | 1 × 1,000,000 | 1,000,000 Hz |
| 3,000 rpm to hertz | 3000 ÷ 60 | 50 Hz |
| 2.4 GHz Wi-Fi in MHz | 2.4 × 1000 | 2,400 MHz |
When you'd use it
- Reading a radio or Wi-Fi band specification
- Converting motor speed between rpm and hertz
- Working with processor or signal clock rates
- Physics coursework on waves
Common questions
How do I convert rpm to hertz?
Divide by 60, since hertz counts per second and rpm counts per minute. 3,000 rpm is 50 Hz — which is exactly why a two-pole motor on a 50 Hz supply spins at 3,000 rpm.
What does hertz actually measure?
Cycles per second. A 50 Hz mains supply reverses direction 50 times a second; a 2.4 GHz signal oscillates 2.4 billion times a second. The unit replaced the older and more literal 'cycles per second' in 1960.
How is frequency related to wavelength?
Inversely, through the wave's speed: wavelength = speed ÷ frequency. Doubling the frequency halves the wavelength. Use the wavelength calculator for the full conversion including velocity factor.
Is anything I enter sent anywhere?
No. Every conversion runs in your browser, so nothing you type is uploaded, logged or stored. There is no account and no record of what you converted.