Frequency Conversions
Convert frequency units — hertz, kHz, MHz, GHz, RPM, BPM. Free calculators for electronics, music, and rotating machinery.
7 units · 6 calculators · reference page (not prioritized for search)
Frequency counts how many cycles occur per second, measured in hertz (Hz). Radio and processors use megahertz and gigahertz; turntables and engines use RPM; music tempo uses beats per minute (BPM).
Many frequency conversions are simple multiples of ten (1 kHz = 1,000 Hz). RPM and BPM require dividing by 60 to get hertz when each cycle is one revolution or one beat per cycle.
Quick frequency calculator
Frequency Calculator
Popular frequency conversions
- Hertz to Kilohertz (utility)
- Kilohertz to Megahertz (utility)
- Megahertz to Gigahertz (utility)
- Revolutions per Minute to Hertz (utility)
- Beats per Minute to Hertz (utility)
- Hertz to Revolutions per Minute (utility)
Real-world example
A motor spec lists 1,800 RPM and you need equivalent hertz for a VFD setting. 1,800 ÷ 60 = 30 Hz — the electrical frequency that produces that shaft speed on a 2-pole motor at synchronous speed (before slip).
All frequency conversions
Frequency units explained
- Hertz (Hz) · base unit
- Also: hz
- Kilohertz (kHz)
- Also: khz
- Megahertz (MHz)
- Also: mhz
- Gigahertz (GHz)
- Also: ghz
- Terahertz (THz)
- Also: thz
- Revolutions per Minute (RPM)
- Also: revolutions per minute, rpm, rev/min, revs per minute, rev per minute
- Beats per Minute (BPM)
- Also: beats per minute
Frequently asked questions
- How do I convert RPM to Hz?
- Divide RPM by 60 to get revolutions per second (Hz). Example: 3,600 RPM = 60 Hz.
- What is the difference between BPM and Hz?
- BPM counts beats per minute (common in music). Hz counts per second. Divide BPM by 60 to compare with Hz.