Frequency Converter

A frequency converter (also searched as freq converter or hertz converter) translates how many cycles occur per second from one unit to another. This free tool handles hertz (Hz), kilohertz (kHz), megahertz (MHz), gigahertz (GHz), and RPM (revolutions per minute) — for electronics, radio, motors, audio, and physics.

Use it to convert hertz / convert hz between SI prefixes, compare mains grid values, or switch between angular speed and frequency. All math runs locally in your browser — no upload.

The SI unit of frequency is the hertz (Hz): one cycle per second. Larger units use standard prefixes:

1 kHz = 1,000 Hz · 1 MHz = 1,000 kHz · 1 GHz = 1,000 MHz

Common conversions: FM radio ≈ 88–108 MHz · Wi‑Fi 2.4 GHz band · CPU clock speeds in GHz · Audio range 20 Hz–20 kHz · Ultrasound in MHz. Enter any value and switch units instantly — this is a variable frequency converter in the mathematical sense (scaling between unit labels), not a hardware device.

Frequency down converter in RF engineering means mixing a signal to a lower carrier frequency — different from dividing 1 GHz by 1,000 to get MHz. This page handles unit scaling only.

A large share of searches involve 50 Hz and 60 Hz mains power — written as 50hz to 60hz converter, 60hz to 50hz converter, 50 to 60 hz converter, 60 to 50 hz converter, hertz converter 50 to 60, or hertz converter 60 to 50.

As unit values: 50 Hz and 60 Hz are different frequencies — 60 Hz is 20% higher than 50 Hz. A synchronous motor at 50 Hz spins 3,000 RPM (2-pole) vs 3,600 RPM at 60 Hz. Use this tool to compare RPM equivalents or confirm the numeric difference.

Searches like frequency converter 60hz to 50hz, frequency converter 50hz to 60hz, 50 hz to 60 hz converter, 60 hz to 50 hz converter, convert 50hz to 60hz, convert 60hz to 50hz, 50 hertz to 60 hertz converter, and 60 hertz to 50 hertz converter often mean electrical equipment that transforms AC mains — not arithmetic. Running a 60 Hz motor on 50 Hz (or vice versa) requires a solid state frequency converter, rotary frequency converter, or power frequency converter — hardware that also handles voltage (110 V vs 220 V) and phase.

Examples of hardware searches (not this software tool): 220v 50hz to 110v 60hz converter, 110v 60hz to 220v 50hz converter, 120v 60hz to 220v 50hz converter, 230v 50hz to 120v 60hz converter, 240v 50hz to 120v 60hz converter, and 220v 50hz to 220v 60hz converter. Those combine voltage, frequency, and phase conversion — consult an electrical frequency converter or ac frequency converter manufacturer.

Aircraft electrical systems often use 400 Hz instead of 50/60 Hz — searched as 400hz frequency converter, 400hz converter, 400 hz power converter, 60hz to 400hz converter, frequency converter 60hz to 400hz, 400hz to 60hz converter, and frequency converter 400hz to 60hz.

As unit math: 400 Hz = 400 cycles per second — 6.67× faster than 60 Hz mains. Enter 400 in the Hz field and convert to kHz (0.4 kHz) or RPM (24,000 RPM for a 2-pole synchronous machine). Ground support 400 hz to 60hz frequency converter units are industrial power equipment, not online calculators.

Frequency converter 60hz to 50hz 3 phase, frequency converter 50hz to 60hz 3 phase, 3 phase frequency converter, and single phase frequency converter refer to 3 phase 400hz frequency converter or VFD hardware — phase count affects wiring, not the Hz→kHz formula.

Period (T) is the inverse of frequency: T = 1 / f. Searches include frequency to period converter, convert frequency to period, frequency to time converter, convert frequency to time, and frequency to time period converter.

T (seconds) = 1 / f (Hz)  ·  f = 1 / T

Examples: 60 Hz → period = 1/60 = 16.67 ms · 50 Hz → 20 ms · 1 kHz → 1 ms · 1 MHz → 1 µs. Enter Hz here, then divide 1 by the result for period in seconds. A 440 Hz audio tone has period ≈ 2.27 ms.

Ne555 square wave generator timing uses R·C with f ≈ 1.44 / ((R₁ + 2R₂)·C) — component design, not unit conversion. This tool converts between Hz, kHz, MHz, GHz, and RPM once you know the frequency value.

Motors and engines quote RPM (revolutions per minute). One revolution per minute equals 1/60 hertz:

Hz = RPM ÷ 60  ·  RPM = Hz × 60

Anchors: 60 Hz → 3,600 RPM (2-pole sync) · 50 Hz → 3,000 RPM · 3,000 RPM → 50 Hz · 3,600 RPM → 60 Hz. Car idle ≈ 750 RPM ≈ 12.5 Hz as shaft frequency (not cylinder firing rate, which depends on strokes and cylinders).

Compare with mains: if a machine spec says 1,450 RPM at 50 Hz, converting RPM to Hz confirms ~24.2 Hz mechanical shaft speed (slip applies for induction motors).

This tool converts frequency units (Hz, kHz, MHz, GHz, RPM). It does not replace hardware or signal-conditioning electronics:

• Frequency to voltage converter, freq to voltage converter, voltage to frequency converter, frequency to analog converter, frequency to current converter, frequency to 4 20ma converter — ICs like lm2907 / lm2917 (Tachometer/F-V chips).
• VFD / vfd converter / variable frequency converter / vfd single phase to three phase / single to three phase vfd / 5 hp single phase to 3 phase vfd — motor drives from siemens vfds, siemens frequency converter, or danfoss frequency converter.
• Static frequency converter, static frequency changer, frequency changer, rotary frequency converter 50hz to 60hz, high frequency power inverter — industrial AC power conversion with pricing searches like frequency converter 60hz to 50hz single phase price.
• Voltage and frequency converter combined boxes, 400 hz ac to dc converter, and product codes like kfd2 ufc ex1 d.

For pure convert hz scaling, 50 hz to 60 hz frequency converter unit comparison, RPM↔Hz, and period calculations (T = 1/f), this page is the right tool.