Converters
Frequency Converter
Pick a 'from' unit and a 'to' unit, enter a value, and the converter returns all common frequency units, including mechanical rotation expressed in RPM.
Decimals and very large numbers are fine. · e.g. 100
Internal base unit is the hertz. cpm and RPM are mechanical rotation units equal to 1/60 Hz.
Megahertz → Gigahertz
0.1 GHz
100 MHz = 0.1 GHz
1 kHz = 1,000 Hz; 1 MHz = 1,000,000 Hz; 1 GHz = 10⁹ Hz; 1 THz = 10¹² Hz. 1 RPM = 1 cycle/min = 1/60 Hz.
Examples
5 GHz
= 5,000 MHz; 5 × 10⁹ Hz
60 Hz (US mains)
= 3,600 RPM
1 RPM
= 1/60 Hz ≈ 0.0167 Hz
1 THz
= 1,000 GHz; 10¹² Hz
How it works
Each frequency unit is defined by its size in hertz. The converter multiplies the input by the factor (in Hz), then divides by the target factor.
SI prefixes · k = 10³, M = 10⁶, G = 10⁹, T = 10¹²
Rotation · 1 RPM = 1 cycle/min = 1/60 Hz
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Frequently asked questions
1 hertz (Hz) is one cycle per second. Higher units (kHz, MHz, GHz, THz) scale by 1,000 each step. RPM (revolutions per minute) and cycles per minute are mechanical equivalents at 1/60 Hz.
1,000. The SI prefix chain is k (10³), M (10⁶), G (10⁹), T (10¹²). 5 GHz = 5,000 MHz = 5,000,000 kHz = 5 × 10⁹ Hz.
Same dimension, different unit. 1 Hz = 60 RPM. A 3,000 RPM engine is rotating at 50 Hz. The converter treats RPM and cpm identically since they are both 1/60 Hz.
Angular frequency ω is 2π × f. This converter handles ordinary frequency in cycles per unit time, not angular frequency in rad/s. For angular work, convert your result by multiplying by 2π.
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