Enter a frequency value and select its unit. Formula: Hertz = Value × Unit Factor, then each target unit = Hertz ÷ Target Factor.
Your entered frequency's waveform plotted against a 60 Hz reference wave over the same time window. Higher frequencies show more compressed cycles; lower frequencies show fewer, wider cycles. Illustrative scale — not a literal oscilloscope trace.
Conversions are mathematically exact for SI-prefixed and rotational units. The waveform chart is illustrative only.
Common real-world frequency values, for quick lookup without re-entering numbers.
| Value | In Hz | Common Use |
|---|---|---|
| 50 Hz | 50 | EU / UK AC mains power |
| 60 Hz | 60 | US / Canada AC mains power |
| 100 MHz | 100,000,000 | Typical FM radio station |
| 433 MHz | 433,000,000 | ISM band — remotes, garage door openers |
| 900 MHz | 900,000,000 | Cellular / ISM band |
| 1.575 GHz | 1,575,000,000 | GPS L1 signal |
| 2.4 GHz | 2,400,000,000 | Wi-Fi / Bluetooth band |
| 2.45 GHz | 2,450,000,000 | Consumer microwave ovens |
| 5 GHz | 5,000,000,000 | Wi-Fi band |
| 3,600 RPM | 60 | 2-pole induction motor synchronous speed at 60 Hz |
| 10,000 RPM | 166.67 | Small high-speed motor / drone motor range |
Three real-world conversion scenarios, worked step by step. Click "Load This Example" to run it in the calculator above.
A deeper look at where each frequency unit on this page comes from — the SI-prefixed units used in everyday electrical and RF work, and the angular/rotational units used in motors, drives, and mechanical systems.
SI-Prefixed Units (Nanohertz through Quettahertz)
Hertz, Millihertz, Microhertz, Nanohertz, Kilohertz, Megahertz, Gigahertz, Terahertz, Petahertz, Exahertz, Zettahertz, Yottahertz, Ronnahertz, and Quettahertz are all the same underlying unit — the hertz, one cycle per second — scaled by a power of ten. This is the International System of Units (SI) convention. Because every SI conversion is an exact power of ten, there is no rounding error going between any two of these units. Ronnahertz and Quettahertz are the newest SI prefixes, formally adopted in 2022.
Radians per Second (rad/s)
Angular frequency measures how fast an angle changes, in radians per second, rather than how many full cycles occur per second. Since one full cycle covers 2π radians, angular frequency (ω) equals 2π times the frequency in Hz. This unit is common in AC circuit analysis, control systems, and rotational mechanics.
Rotational Frequency Units (rpm, rps, rph, rpd, rpwk, rpmo, rpy)
These units express frequency as revolutions over a given time period rather than cycles per second. Revolutions per minute (rpm) is the most common — used for motor speed, drone propellers, and fans. Revolutions per second (rps) is numerically identical to Hz. The longer-period units (rph, rpd, rpwk, rpmo, rpy) are used for very slow rotational systems and use calendar-based time constants — an hour, day, week, average month, and Julian year, respectively.
This guide is provided for educational and reference purposes. Always confirm measured frequency values against a properly calibrated instrument before relying on them for any electrical or mechanical work.