 | This Lua module is used on approximately 210 pages and changes may be widely noticed. Test changes in the module's /sandbox or /testcases subpages, or in your own module sandbox. Consider discussing changes on the talk page before implementing them. |
This module can be used to quickly add a new unit for use with {{convert}}. When satisfied that a unit is working correctly, ask at Module talk:Convert for the unit to be moved to the permanent list of units.
See Template:Convert/unit sandbox for a good way to prepare unit definitions that can be copied into this page.
The following extracts from Module:Convert/data show examples that could be used to define a new unit. Any number of spaces can be used where blanks are shown in the following.
Examples for additions to
Module:Convert/extra (For the actual module code see below) |
|---|
-- These are EXAMPLES on the documentation page. Scroll down to see the module content.
local extra_units = {
-- Similar to a redirect: "sqm" is an alias for "m2".
-- {{convert|1.5|m2|sp=us}} → 1.5 square meters (16 sq ft)
-- {{convert|1.5|sqm|sp=us}} → 1.5 square meters (16 sq ft)
["sqm"] = {
target = "m2",
},
-- A simple unit, showing the minimum that is required.
-- The "ha" is the unit code used to identify the unit:
-- {{convert|1.5|ha}} → 1.5 hectares (3.7 acres)
["ha"] = {
name1 = "hectare",
symbol = "ha",
utype = "area",
scale = 10000,
default = "acre",
},
-- A unit which accepts an SI prefix. There is no "name1" field because it
-- has to be constructed (mJ gives "millijoule"; MJ gives "megajoule").
-- {{convert|125|kJ}} → 125 kilojoules (30,000 cal)
["J"] = {
_name1 = "joule",
_symbol = "J",
utype = "energy",
scale = 1,
prefixes = 1,
default = "cal",
link = "Joule",
},
-- A unit where US and plural names are required.
-- {{convert|125|cm/s2}} → 125 centimetres per second squared (4.1 ft/s²)
["cm/s2"] = {
name1 = "centimetre per second squared",
name1_us = "centimeter per second squared",
name2 = "centimetres per second squared",
name2_us = "centimeters per second squared",
symbol = "cm/s<sup>2</sup>",
utype = "acceleration",
scale = 0.01,
default = "ft/s2",
link = "Gal (unit)",
},
-- A "per" unit is defined as the ratio of two other units.
-- {{convert|125|g/cm3}} → 125 grams per cubic centimetre (4.5 lb/cu in)
["g/cm3"] = {
per = { "g", "cm3" },
utype = "density",
default = "lb/cuin",
},
-- If the automatic "per" link is not wanted, a link can be specified.
-- {{convert|125|g/cm3|lk=on|disp=unit}} → [[gram]]s per [[cubic centimetre]]
-- {{convert|125|g/m3|lk=on|disp=unit}} → [[density|grams per cubic metre]]
["g/m3"] = {
per = { "g", "m3" },
utype = "density",
default = "lb/cuyd",
link = "density",
},
-- Characters "$" and "£" are recognized as currency symbols.
-- {{convert|125|$/acre}} → $125 per acre ($310/ha)
["$/acre"] = {
per = { "$", "acre" },
utype = "cost $ per unit area",
default = "$/ha",
},
-- An output unit can be defined as a combination of existing units.
-- {{convert|2|ha|ft2 m2}} → 2 hectares (220,000 sq ft; 20,000 m²)
-- Any number of output units can be specified.
-- NOTE: There may be no need to define a combination because a convert
-- can specify the output by joining unit codes with "+":
-- {{convert|1.2|acre|ft2+yd2+m2}} → 1.2 acres (52,000 sq ft; 5,800 sq yd; 4,900 m²)
["ft2 m2"] = {
combination = { "ft2", "m2" },
utype = "area",
},
-- An output unit can be defined using subunits (from least to most significant).
-- {{convert|90|in|ydftin}} → 90 inches (2 yd 1 ft 6 in)
["ydftin"] = {
combination = { "in", "ft", "yd" },
multiple = { 12, 3 },
utype = "length",
},
}
|
| Field | Description |
|---|---|
symbol |
Unit identifier used when abbr=on is in effect.
|
name1 |
Singular name of the unit used when abbr=off is in effect.
|
name2 |
Plural name of the unit; not required if it is the same as name1 plus "s".
|
name1_us |
Singular name when sp=us is in effect; not required if the same as name1.
|
name2_us |
Plural name when sp=us is in effect; not required if the same as name1_us plus "s".
|
utype |
Unit type; must be exactly the same as the utype of any other unit used in a conversion.
|
scale |
Number of base units in the unit being defined. |
default |
Unit code of the default output used when no output unit is specified in a conversion. |
target |
Unit code of an existing unit (the unit being defined "redirects" to the existing unit). |
prefixes |
Use 1 if an SI prefix is accepted; 2 is used for m2, and 3 is used for m3.
|
link |
Article title used when lk=on is in effect; not required if it is the same as name1.
|
-- Extra conversion data used by Module:Convert.
--
-- [[Module:Convert/data]] defines all units and is transcluded in all pages
-- where [[Module:Convert]] is used. Testing new units by editing that module
-- would invalidate the cache for all affected pages.
--
-- For quick changes and experiments with new units, this module can be edited.
-- Since this module is transcluded in only a small number of pages, changes
-- should cause little server overhead and should propagate quickly.
--
-- If a unit is defined in the data module, any definition here is ignored,
-- so defining the same unit in both modules is not an error.
-- A unit defined here can refer to units that are also defined here, and
-- can refer to units defined in the data module.
--
-- Periodically, those extra units that are wanted permanently can be removed
-- from here after being added to [[Module:Convert/data]].
local extra_units = {
["$/g"] = {
per = { "$", "g" },
utype = "cost $ per unit mass",
default = "$/lb",
},
["$/oz"] = {
per = { "$", "oz" },
utype = "cost $ per unit mass",
default = "$/g",
},
["gr water"] = {
name1 = "grains water",
name2 = "grains water",
symbol = "gr H<sub>2</sub>O",
utype = "volume",
scale = 0.00000006479891,
default = "cm3",
link = "Grain (unit)",
},
["lb(f)"] = {
name1 = "pound",
symbol = "lb",
utype = "force",
scale = 4.4482216152605,
default = "N",
link = "Pound-force",
},
["DPI"] = {
name1 = "DPI",
name2 = "DPI",
symbol = "DPI",
utype = "dotlength",
invert = -1,
iscomplex= true,
scale = 1/0.0254,
default = "pitch",
link = "Dots per inch",
},
["pitch"] = {
name1 = "um/dot",
name2 = "um/dot",
symbol = "um/dot",
utype = "dotlength",
invert = 1,
scale = 0.000001,
default = "DPI",
link = "Dots_per_inch#Proposed_metrication",
},
["dpcm"] = {
name1 = "dot/cm",
name2 = "dot/cm",
symbol = "dot/cm",
utype = "dotlength",
invert = -1,
iscomplex= true,
scale = 1/0.01,
default = "DPI",
link = "Dots_per_inch#Proposed_metrication",
},
["isp"] = {
name1 = "second",
symbol = "second",
utype = "speed",
invert = 1,
scale = 9.8066,
default = "m/s",
link = "specific impulse",
},
["si tsfc"] = {
name1 = "g/kNs",
name2 = "g/kNs",
symbol = "g/kNs",
utype = "speed",
invert = -1,
iscomplex= true,
scale = 1/101972*9.8066,
default = "tsfc",
link = "thrust specific fuel consumption",
},
["tsfc"] = {
name1 = "lb/lbf h",
name2 = "lb/lbf h",
symbol = "lb/lbf h",
utype = "speed",
invert = -1,
iscomplex= true,
scale = 1/9.8066/3600,
default = "si_tsfc",
link = "thrust specific fuel consumption",
},
}
return { extra_units = extra_units }