The frequency converter is a free online tool that helps you convert between engineering units quickly and accurately. It supports 5 units including Hertz (Hz), Kilohertz (kHz), Megahertz (MHz), Gigahertz (GHz), Revolutions per Minute (RPM). The core conversion formula is: 1 kHz = 1000 Hz | 1 MHz = 1000 kHz | 1 GHz = 1000 MHz. For example, 1 Hertz equals approximately 0.001 Kilohertz. Conversely, 1 Kilohertz equals approximately 1,000 Hertz. Common conversions: 5 Hz = 0.005 kHz, 10 Hz = 0.01 kHz, 25 Hz = 0.025 kHz, 50 Hz = 0.05 kHz, 100 Hz = 0.1 kHz. This converter is useful for students, engineers, scientists, and professionals who need accurate engineering unit conversions. Whether you are working on homework, technical specifications, research data, or everyday measurements, this tool provides instant, reliable results. All conversions are calculated relative to a single base unit for consistency and precision across all supported units. Hertz is the SI unit of frequency, named after Heinrich Hertz. Audio frequencies range from 20 Hz to 20,000 Hz for human hearing.