PrismKitUnitsFrequency ConverterFrequency ConverterRuns in your browserLocalCopy linkMarkdownConvert hertz up to terahertz, plus revolutions per minute and radians per second.Angle ConverterConvert an angle between degrees, radians, gradians, arcminutes, arcseconds and turns.Illuminance ConverterConvert lux, foot-candles, phots, nox, and lumens per area.