PrismKitUnitsTime ConverterTime ConverterRuns in your browserLocalCopy linkMarkdownBreak a duration down into nanoseconds through years, using average Gregorian months and years.Speed ConverterExpress a speed in km/h, mph, m/s, ft/s, knots or as a fraction of the speed of light.Pressure ConverterConvert pascals, bar, atmospheres, psi, torr and inches of mercury in one view.