Convert units of length, weight, and temperature.

Convert-Units.ps1

function Convert-Distance {
    <#
	.SYNOPSIS
		Convert units of distance from metric to imperial and vise versa.

	.DESCRIPTION
        Convert units of distance from the input unit to the output unit. Supported units are the millimetre (mm), centimetre (cm), metre (m), kilometre (km), inch (in), foot (ft),
        yard (yd), and mile (mi).

	.PARAMETER Value
        The number of units to convert.

    .PARAMETER Unit
        The unit used for the input type. Must be one of the following: in, ft, yd, mi, mm, cm, m, or km.

    .EXAMPLE
        Convert-Distance -Value 20 -Unit ft

    .EXAMPLE
        Convert-Distance -Value 50 -Unit in

	.EXAMPLE
		Convert-Distance 50 ft | Select-Object m
	#>
    [OutputType([PSCustomObject])]
	param(
        [Parameter(Mandatory,ValueFromPipeline,Position=0)]
        [double] $Value,

        [Parameter(Mandatory,Position=1)]
        [ValidateSet('in', 'ft', 'yd', 'mi', 'mm', 'cm', 'm', 'km')]
        [string] $Unit
    )
    process {
        switch -Exact ($unit) {
            { 'in' -eq $_ } {
				[PSCustomObject]@{
					mm = ($value * 25.4)
					cm = ($value * 2.54)
					m = ($value * 0.0254)
					km = ($value * 0.0000254)
					in = $value
					ft = ($value / 12)
					yd = ($value / 36)
					mi = ($value / 63360)
				}
            }
			{ 'ft' -eq $_ } {
				[PSCustomObject]@{
					mm = ($value * 304.8)
					cm = ($value * 30.48)
					m = ($value * 0.3048)
					km = ($value * 0.0003048)
					in = ($value * 12)
					ft = $value
					yd = ($value / 3)
					mi = ($value / 5280)
				}
			}
			{ 'yd' -eq $_ } {
				[PSCustomObject]@{
					mm = ($value * 914.4)
					cm = ($value * 91.44)
					m = ($value * .9144)
					km = ($value * 0.0009144)
					in = ($value * 36)
					ft = ($value * 3)
					yd = $value
					mi = ($value / 1760)
				}
			}
			{ 'mi' -eq $_ } {
				[PSCustomObject]@{
					mm = ($value * 1609344)
					cm = ($value * 160934.4)
					m = ($value * 1609.344)
					km = ($value * 1.609344)
					in = ($value * 63360)
					ft = ($value * 5280)
					yd = ($value * 1760)
					mi = $value
				}
			}
			{ 'mm' -eq $_ } {
				[PSCustomObject]@{
					in = ($value / 25.4)
					ft = ($value / 304.8)
					yd = ($value / 914.4)
					mi = ($value / 1609344)
					mm = $value
					cm = ($value / 10)
					m = ($value / 1000)
					km = ($value / 1000000)
				}
			}
			{ 'cm' -eq $_ } {
				[PSCustomObject]@{
					in = ($value / 2.54)
					ft = ($value / 30.48)
					yd = ($value / 91.44)
					mi = ($value / 160934.4)
					mm = ($value * 10)
					cm = $value
					m = ($value / 100)
					km = ($value / 100000)
				}
			}
			{ 'm' -eq $_ } {
				[PSCustomObject]@{
					in = ($value / 0.0254)
					ft = ($value / 0.3048)
					yd = ($value / 0.9144)
					mi = ($value / 1609.344)
					mm = ($value * 1000)
					cm = ($value * 100)
					m = $value
					km = ($value / 1000)
				}
			}
			{ 'km' -eq $_ } {
				[PSCustomObject]@{
					in = ($value / 0.0000254)
					ft = ($value / 0.0003048)
					yd = ($value / 0.0009144)
					mi = ($value / 1.609344)
					mm = ($value * 1000000)
					cm = ($value * 100000)
					m = ($value * 1000)
					km = $value
				}
			}
        }
    }
}

function Convert-Temperature {
    <#
	.SYNOPSIS
		Convert units temperature units between farenheit, celcius, and kelvin.

	.DESCRIPTION
        Convert units of temperature from the input unit to the output unit. Supported units are farenheit (f), celcius (c), and kelvin (k)

	.PARAMETER Value
        The number of units to convert.

    .PARAMETER Unit
        The unit used for the input type. Must be one of the following: f, c, or k.

    .EXAMPLE
        Convert-Temperature -Value 20 -Unit f

    .EXAMPLE
        Convert-Temperature -Value 50 -Unit k

	.EXAMPLE
		Convert-Temperature 50 c | Select-Object k
	#>
    [OutputType([PSCustomObject])]
	param(
        [Parameter(Mandatory,ValueFromPipeline,Position=0)]
        [double] $Value,

        [Parameter(Mandatory,Position=1)]
        [ValidateSet('f','c','k')]
        [string] $Unit
    )
    process {
        switch -Exact ($unit) {
            { 'f' -eq $_ } {
				[PSCustomObject]@{
					c = (($value - 32) * (5 / 9))
					k = (($value + 459.67) * ( 5 / 9))
				}
            }
			{ 'c' -eq $_ } {
				[PSCustomObject]@{
					f = (($value * ( 9 / 5)) + 32)
					k = ($value + 273.15)
				}
			}
			{ 'k' -eq $_ } {
				[PSCustomObject]@{
					f = (($value * ( 9 / 5)) - 459.67)
					c = ($value - 273.15)
				}
			}
        }
    }
}

function Convert-Weight {
	<#
	.SYNOPSIS
		Convert units of weight from metric to imperial and vise versa.

	.DESCRIPTION
		Convert units of weight from the input unit to the output unit. Supported units are the ounce (oz), pound (lb), short ton (tn), milligram (mg), gram (g), kilogram (kg), and metric ton (t).

	.PARAMETER Value
		The number of units to convert.

	.PARAMETER Unit
		The unit used for the input type. Must be one of the following: oz, lb, tn, mg, g, kg, or t.

	.EXAMPLE
		Convert-Weight -Value 20 -Unit lb

	.EXAMPLE
		Convert-Weight -Value 50 -Unit oz

	.EXAMPLE
		Convert-Weight 50 kg | Select-Object tn
	#>
	[OutputType([PSCustomObject])]
	param(
		[Parameter(Mandatory,ValueFromPipeline,Position=0)]
		[double] $Value,

		[Parameter(Mandatory,Position=1)]
		[ValidateSet('oz', 'lb', 'tn', 'mg', 'g', 'kg', 't')]
		[string] $Unit
	)
	process {
		switch -Exact ($unit) {
			{ 'oz' -eq $_ } {
				[PSCustomObject]@{
					mg = ($value * 28349.5231)
					g = ($value * 28.3495231)
					kg = ($value * 0.0283495231)
					t = ($value * 0.0000283495231)
					oz = $value
					lb = ($value / 16)
					tn = ($value / 32000)
				}
			}
			{ 'lb' -eq $_ } {
				[PSCustomObject]@{
					mg = ($value * 453592.37)
					g = ($value * 453.59237)
					kg = ($value * 0.45359237)
					t = ($value * 0.00045359237)
					oz = ($value * 16)
					lb = $value
					tn = ($value / 2000)
				}
			}
			{ 'tn' -eq $_ } {
				[PSCustomObject]@{
					mg = ($value * 907184740)
					g = ($value * 907184.74)
					kg = ($value * 907.18474)
					t = ($value * 0.90718474)
					oz = ($value * 32000)
					lb = ($value * 2000)
					tn = $value
				}
			}
			{ 'mg' -eq $_ } {
				[PSCustomObject]@{
					mg = $value
					g = ($value / 1000)
					kg = ($value / 1000000)
					t = ($value / 1000000000)
					oz = ($value / 28349.5231)
					lb = ($value / 453592.37)
					tn = ($value / 907184740)
				}
			}
			{ 'g' -eq $_ } {
				[PSCustomObject]@{
					mg = ($value * 1000)
					g = $value
					kg = ($value / 1000)
					t = ($value / 1000000)
					oz = ($value / 28.3495231)
					lb = ($value / 453.59237)
					tn = ($value / 907184.74)
				}
			}
			{ 'kg' -eq $_ } {
				[PSCustomObject]@{
					mg = ($value * 1000000)
					g = ($value * 1000)
					kg = $value
					t = ($value / 1000)
					oz = ($value / 0.0283495231)
					lb = ($value / 0.45359237)
					tn = ($value / 907.18474)
				}
			}
			{ 't' -eq $_ } {
				[PSCustomObject]@{
					mg = ($value * 1000000000)
					g = ($value * 1000000)
					kg = ($value * 1000)
					t = $value
					oz = ($value / 0.0000283495231)
					lb = ($value / 0.00045359237)
					tn = ($value / 0.90718474)
				}
			}
		}
	}
}