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Template:Convert/doc

< Template:Convert

Template {{convert}} calculates measurements from one unit (you can enter) to another one, and then presents the results. For example:

{{convert|2|km|mi}} → 2公里（1.2英里）
{{convert|7|mi|km}} → 7英里（11公里）

Multiple formatting and calculation options are listed below.

Unit name or symbol (abbreviation): 1 pound or 1 lb?

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By default, the first value shows unit name, the second the symbols (= abbreviation). Use |abbr=on/off to change this behaviour:

{{convert|1|lb|kg}} → 1英磅（0.45公斤） (To compare; default: first value shows unit name)
{{convert|1|lb|kg|abbr=on}} → 1磅（0.45公斤）
{{convert|1|lb|kg|abbr=off}} → 1英磅（0.45公斤）
  • |abbr=in toggles the default behaviour (|abbr=out):
{{convert|1|lb|kg|abbr=in}} → 1磅（0.45公斤）

Adjective: a 10-mile distance

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Use |adj=on to produce the adjective form. The difference:

{{convert|10|mi|km}} to go → 10英里（16公里） to go. (To compare, default)
A {{convert|10|mi|km|adj=on}} distance → A 10-英里（16-公里） distance. (Adjective form)

Rounding: 100 ft is 30 m or 30.5 m or 30.48 m?

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In detail, it is 100英尺（30,480毫米）. In practical use, it is common to round the calculated metric number. With that, there are several possibilities.

Default rounding

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By default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant figures, whichever is more precise. An exception to this is rounding temperatures (see below).
Examples of rounding
Input Displays as Note
{{convert|123|ft|m|-1}} 123英尺（40米）
{{convert|123|ft|m|0}} 123英尺（37米）
{{convert|123|ft|m|1}} 123英尺（37.5米）
{{convert|550|ft|m|0}} 550英尺（168米） Approximate value is 167.64 m
{{convert|550|ft|m}} 550英尺（170米） Rounds to 170, when approximate value is 167.64 m
{{convert|500|ft|m|0}} 500英尺（152米） Approximate value is 152.4 m
{{convert|500|ft|m}} 500英尺（150米） Rounds to 150, when approximate value is 152.4 m

Convert supports four types of rounding:

Round to a given precision: use |precision=

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Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest power of 1/10 this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234.

Round to a given number of significant figures: use |sigfig=

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To specify the output number to be with n significant figures use |sigfig=<number>:

  • To compare: {{convert|1200|ft|m}} → 1,200英尺（370米）
  • {{convert|1200|ft|m|sigfig=4}} → 1,200英尺（365.8米）
  • {{convert|1200|ft|m|sigfig=3}} → 1,200英尺（366米）
  • {{convert|1200|ft|m|sigfig=2}} → 1,200英尺（370米）
  • {{convert|1200|ft|m|sigfig=1}} → 1,200英尺（400米）

Setting |sigfig= is meaningless

  • {{convert|1200|ft|m|sigfig=0}} → 1,200英尺（370米）

Round to a multiple of 5: 15, 20, 25, ...

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Using |round=5 rounds the outcome to a multiple of 5.

{{convert|10|m|ft}} → 10米（33英尺）
{{convert|10|m|ft|round=5}} → 10米（35英尺）

Similar: using |round=25 rounds the outcome to a multiple of 25.

{{convert|10|m|ft}} → 10米（33英尺）
{{convert|10|m|ft|round=25}} → 10米（25英尺）
To compare: {{convert|10|m|ft|sigfig=4}} → 10米（32.81英尺）

In a range, one can round each value individually to the default. Use |round=each:

{{convert|10 x 200 x 3000|m|ft}} → 10乘200乘3,000米（33乘656乘9,843英尺）
{{convert|10 x 200 x 3000|m|ft|round=each}} → 10乘200乘3,000米（33乘660乘9,800英尺）

Round to a multiple of a given fraction: 2 3/16 inch

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Specify the desired denominator using |frac=<some positive integer>. (Denominator is the below-the-slash number, for example the 3 in 1/3).

{{convert|5.56|cm|in|frac=16}} → 5.56厘米（2 3⁄16英寸）
{{convert|8|cm|in|frac=4}} → 8厘米（3 1⁄4英寸）

The fraction is reduced when possible:

{{convert|8|cm|in|frac=100}} → 8厘米（3 3⁄20英寸）
{{convert|8|cm|in}} → 8厘米（3.150英寸） (To compare)

Rounding the temperatures °C, °F and K

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In temperatures, the conversion will be rounded either to precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise.

{{convert|10|C|F K}} → 10 °C（50 °F；283 K）

Note

For a temperature difference, like to convert "A rise of 20 °C", use |C-change=20 &tc.
{{convert|20|C-change|F-change K-change}} → A rise of 20 °C變化（36 °F變化；20 K變化）
To compare: "A temperature of 20 °C" would yield: A temperature of 20 °C（68 °F；293 K）

Into multiple units: 10 °C（50 °F；283 K）

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Separate the multiple output units by a space:

{{convert|10|C|F K}} → 10 °C（50 °F；283 K）
{{convert|5|km|mi nmi}} → 5公里（3.1英里；2.7海里）

Ranges of values

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A range: 6 to 17 kg (13 to 37 lb)

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Range indicators are entered as the second parameter (between the values). Range separators can be:
Template:Convert/doc/range separator list

Multiple dimensions: 6米 × 12米（20英尺 × 39英尺）

编辑
Use "by"
{{convert|6|by|12|ft|m}} → 6乘12英尺（1.8乘3.7米）
Use "×" or ""x""
{{convert|6|x|12|m|ft}} → 6乘12米（20乘39英尺）

In science, the formal way is to set |x| and |abbr=on (keeping dimensions right, like in area = x km2):

{{convert|6|x|12|m|ft|abbr=on}} → 6米 × 12米（20英尺 × 39英尺）

About feet, inch in ranges and multiples

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While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges:

  • {{convert|1|ft|3|in|mm}} → 1英尺3英寸（380毫米） (to compare)
  • {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → 1英尺3英寸（[convert: 不明單位]）

Words

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Spelling of unit name: UK metre or US meter?

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Default spelling of units is en-UK. To show en-US spelling, use |sp=us:

{{convert|1|m|ft}} → 1米（3.3英尺） -- default
{{convert|1|m|ft|sp=us}} → 1米（3.3英尺）

Spell out numbers: ten miles

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To write a number in words, use |spell=in:

{{convert|10|mi|m|spell=in}} → 10英里（16,000米）

To make first letter a capital, use |spell=In

{{convert|10|mi|m|spell=In}} → 10英里（16,000米）

Extra words: 4 planted acres

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Incomplete section
{{convert|4|acre||adj=pre|planted}} → 4 planted 英畝（1.6公頃）

Extra adjective words: A 10-英尺-long corridor

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{{convert|4|ft|m|adj=mid|-long}} → 10-英尺-long（3.0-米）

Grammatical construction: The 18-, 24- and 32-pounder (8, 11 and 15 kg) cannons

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"The American defenders had 18-, 24- and 32-pounder (8, 11 and 15 kg) cannons."

This formatted result is not possible straightforward by using {{convert}}. However, it can be made in three steps.

Step 1: Enter the input numbers and units in {{convert}} just to get the calculated output:
  • had {{convert|18 |, |24 |, |32 |lb |kg |0 }} cannons
→ had 18、24、32英磅（8、11、15公斤） cannons
The core conversion should look good now. You can save this (or preview).
Step 2: We need the resulting text in plain code in the page, not as a {{convert|...}} template.
For this, add subst: to the template name (for 'substitute') :
  • had {{subst:convert|18 |, |24 |, |32 |lb |kg |0 }} cannons
As a check: the preview result should show the conversion correct, with the numbers still right.
Now save this.
→ had 18, 24, 32 pounds (8, 11, 15 kg) cannons
Step 3: When opening the edit screen again, you'll see that the text is there in code. The template {{convert|...}} itself has disappeared. You can change the text as needed. The edit screen text is:
had 18,&nbsp;24,&nbsp;32 pounds (8,&nbsp;11,&nbsp;15&nbsp;kg) cannons
You can edit this text to add the grammar:
  • had 18-,_24-_and_32-pounder (8,&nbsp;11_and_15&nbsp;kg) cannons
After saving your edit, it shows:
→ "had 18-, 24- and 32-pounder (8, 11 and 15 kg) cannons".

Numbers

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Using an SI prefix: gigameter (Gm), or micrometer (μm)

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Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigameter. These are plain multiplication factors.

To illustrate, these are trivial calculations (from meter to meter), showing the multiplication factor:

  • 12 G米（1.2×1010米）
  • 12 µ米（1.2×10−5米）

The prefix can be added before the SI unit (here: unit m for meter):

  • {{convert|12|Gm|mi|abbr=on}} → 12 G米（7,500,000 mi）
  • Mm: 12 M米（7,500 mi）
  • km: 12 km（39,000英尺）
  • mm: 12 mm（0.47英寸）
  • μm: 12 µ米（0.012 mm）
  • um: 12 µ米（0.012 mm） (letter "u" can be used for "μ" here)

The prefix can be used in the output unit:

  • {{convert|12000|mi||Mm|abbr=on}} → 12,000 mi（19 M米）
  • {{convert|12|in|μm|abbr=on}} → 12英寸（300,000 µ米）

As an exception, the non-SI unit "inch" can have the "μ" prefix too)

  • {{convert|12|μm|μin|abbr=on}} → 12 µ米（470 µin）

Thousands separator: 1,000 mi and 1000 mi

编辑

In input, a comma for thousands separator is accepted. A gap (space) is not. In output, by default, the thousand separator is the comma:

  • {{convert|1,234,567|m|ft}} → 1,234,567米（4,050,417英尺）
  • {{convert|1,234,567|m|ft}} → 1,234,567米（4,050,417英尺）
  • {{convert|1 234 567|m|ft}} → [convert: 無效數字]

Set |comma=off to remove the separator:

  • {{convert|1234567|m|ft|comma=off}} → 1234567米（4050417英尺）*

Use |comma=gaps to set digit grouping by gap (<space>) in larger numbers (thousands separator):

  • {{convert|1234567|m|ft}} → 1,234,567米（4,050,417英尺） (To compare, default)
  • {{convert|1234567|m|ft|comma=gaps}} → 1234567米（4050417英尺）

Setting |comma=5 or |comma=gaps5 will only add the separator when the number of digits is 5 or more:

  • {{convert|1234|m|ft}} → 1,234米（4,049英尺） (To compare, default)
  • {{convert|1234|m|ft|comma=5}} → 1234米（4049英尺）
  • {{convert|1234567|m|ft|comma=5}} → 1,234,567米（4,050,417英尺）
  • {{convert|1234|m|ft|comma=gaps5}} → 1234米（4049英尺）*
  • {{convert|1234567|m|ft|comma=gaps5}} → 1234567米（4050417英尺）*

Output manipulation

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Brackets and separators: 10 m [33 ft]

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Punctuation that distinguishes the two measurements is set by |disp=.
Options are: b (the default), sqbr, comma, or, br, x|...:

{{convert|10|m|ft}} → 10米（33英尺） -- ( ) brackets are the default
{{convert|10|m|ft|disp=sqbr}} → 10米 [33英尺]
{{convert|10|m|ft|disp=comma}} → 10米, 33英尺
{{convert|10|m|ft|disp=or}} → 10米或33英尺

Setting |disp=br will force a new line (<br>)

{{convert|10|m|ft|disp=br}} → 10米
33英尺

Setting |disp=x|... allows any text as separator:

{{convert|10|m|ft|disp=x|_MyText_}} → 10米_MyText_33英尺 -- (To display spaces, use &nbsp;)

Flipping (reordering) the two measurements: 1,609.3米（1英里）

编辑

Setting |order=flip will flip (swap) the two measurements:

{{convert|1|mi|m}} → 1英里（1,609.3米） (To compare, default)
{{convert|1|mi|m|order=flip}} → 1,609.3米（1英里）

When converting to multiple units, the effect is:

{{convert|10|km|mi nmi|order=flip}} → 6.2137英里；5.3996海里（10公里）
{{convert|10|km|nmi mi|order=flip}} → 5.3996海里；6.2137英里（10公里）

Displaying parts of the result: 2（1.5）

编辑

It is possible to display only parts of the conversion result:

Convert Output Description
{{convert|2|cuyd|m3}} 2立方碼（1.5立方米） Default, to compare
{{convert|2|cuyd|m3|abbr=values}} 2（1.5） Input and output numbers
{{convert|2|cuyd|m3|disp=unit}} 立方碼 Input unit
{{convert|2|cuyd|m3|disp=unit|adj=on}} 立方碼 Input unit, adjective (hyphenated)
{{convert|2|cuyd|cuyd|0|disp=out|abbr=off}} 2立方碼 Input (workaround)
{{convert|2|cuyd|m3|disp=unit2}} 立方米 Output unit (symbol)
{{convert|2|cuyd|m3|disp=unit2|abbr=off}} 立方米 Output unit (name)
{{convert|2|cuyd|m3|disp=number}} 1.5 Output value
{{convert|2|cuyd|m3|disp=out}} 1.5立方米 Output value and unit
{{convert|2|cuyd|m3|disp=out|abbr=off}} 2立方碼（1.5立方米） Output value and unit

Table options

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For the wikitable structure, there are two options: split over columns and make the table sortable.

Show numbers only in columns in a table

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Using {convert} in a table cell, with |disp=table splits the result over two columns:

{{convert|10|m|ft|disp=table}} → style="text-align:right;"|10

|style="text-align:right;"|33

|disp=tablecen does the same, and also centers the text:

{{convert|20|m|ft|disp=tablecen}} → style="text-align:center;"|20

|style="text-align:center;"|66

The units are added as a column header:

  m ft
|disp=table 10 33
|disp=tablecen 20 66
|disp=<other> (default) 30米（98英尺）

Sorting

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Use both |disp=table |sortable=on to produce table columns (pipe symbols), with sortable table column. As of January 2013, only the first (lefthand) column will sort (improvements pending).
{{convert|10|m|ft|disp=table|sortable=on}} →

style="text-align:right;" data-sort-value="7001100000000000000"|10 |style="text-align:right;" data-sort-value="7001100000000000000"|33

This shows the hidden numerical sortkey:

align="right"|<span style="display:none">7001100000000000000</span>10 |align="right"|33

m ft
15 3⁄4 52
15.5 51
16.0 52.5
16 52

Parameter list

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Template:Navbar-collapsible
Option Template:Abbr Description Note
|abbr=in Template:Hidden sort key Use symbol for first (left-hand side) unit Symbol ('abbreviation')
|abbr=off Template:Hidden sort key Use name for all units Symbol ('abbreviation')
|abbr=none Template:Hidden sort key
|abbr=on Template:Hidden sort key Use symbol for all units Symbol ('abbreviation')
|abbr=out Template:Hidden sort key Use symbol for right-hand side unit (default) Symbol ('abbreviation')
|abbr=values Template:Hidden sort key Show only input and output numbers, not units Parts only
|adj=1 Template:Hidden sort key Unit name is singular when number is 1 or less, but not zero Grammar, plural
|adj=j Template:Hidden sort key Join number and unit name using "&nbsp;" instead of a space Join values
|adj=mid|x=... Template:Hidden sort key User-specified text after the input unit; sets adj=on (adjective) Word adding, adjective
|adj=on Template:Hidden sort key Unit name is adjective (singular and hyphenated) Grammar, adjective
|adj=pre|x=... Template:Hidden sort key User-specified text before input unit Word adding
|adj=ri0 Template:Hidden sort key Round input with precision 0 Rounding and sigfig
|adj=ri1 Template:Hidden sort key Round input with precision 1 Rounding and sigfig
|adj=ri2 Template:Hidden sort key Round input with precision 2 Rounding and sigfig
|adj=ri3 Template:Hidden sort key Round input with precision 3 Rounding and sigfig
|disp=b Template:Hidden sort key Join input and output using " (...)" (default) Join values
|disp=sqbr Template:Hidden sort key Join input and output using " [...]" Join values
|disp=br Template:Hidden sort key Join input and output using "<br/>" Join values
|disp=comma Template:Hidden sort key Join input and output using ", " Join values
|disp=or Template:Hidden sort key Join input and output using " or " Join values
|disp=number Template:Hidden sort key Display output number only Parts only
|disp=output number only Template:Hidden sort key
|disp=out Template:Hidden sort key Display only output number and name/symbol Parts only
|disp=output only Template:Hidden sort key
|disp=preunit|x=... Template:Hidden sort key User-specified text before input and output units Word adding
|disp=table Template:Hidden sort key Output is suitable for a table cell with align="right" Table columns
|disp=tablecen Template:Hidden sort key Output is suitable for a table cell with align="center" Table columns
|disp=unit Template:Hidden sort key Display input name/symbol only ( not input number, not output) Parts only
|disp=unit2 Template:Hidden sort key Display output name/symbol only (not input; not output number) Parts only
|disp=x|... Template:Hidden sort key Join input and output using user-specified text Word adding
|comma=5 Template:Hidden sort key Only use comma for thousands separator if 5 or more digits Number format
|comma=gaps Template:Hidden sort key Use gaps (space), not comma, for thousands separator Number format
|comma=gaps5 Template:Hidden sort key Use gaps (space), but only if 5 or more digits Number format
|comma=off Template:Hidden sort key No thousands separator Number format
|frac=N Template:Hidden sort key Show imperial number in fractions, denominator=N Number format, fraction
|lk=in Template:Hidden sort key Link left-hand side unit name or symbol Unit link
|lk=on Template:Hidden sort key Link all unit names or symbols (but not twice for the same unit) Unit link
|lk=out Template:Hidden sort key Link right-hand side unit name or symbol Unit link
|order=flip Template:Hidden sort key Inverts order of input, output measurements (conversion first) Order
|round=5 Template:Hidden sort key Rounds calculation to the nearest multiple of 5 Rounding and sigfig
|round=25 Template:Hidden sort key Rounds calculation to the nearest multiple of 25 Rounding and sigfig
|round=each Template:Hidden sort key In a range, each number is rounded by the default rounding Rounding and sigfig
|sigfig=N Template:Hidden sort key Round output number to N significant figures (N is a positive integer) Rounding and sigfig
|sortable=in Template:Hidden sort key Output numeric hidden sort field for use in a sortable table (based on input) Table sort
|sortable=on Template:Hidden sort key
|sortable=out Template:Hidden sort key Output numeric hidden sort field for use in a sortable table (based on output) Table sort
|sp=us Template:Hidden sort key Use U.S. spelling (like "meter" instead of default "metre") Spelling U.S. names
|spell=in Template:Hidden sort key Spell input number in words Spelling numbers
|spell=In Template:Hidden sort key Spell input number in words with first letter uppercase Spelling numbers
|spell=on Template:Hidden sort key Spell input and output numbers in words Spelling numbers
|spell=On Template:Hidden sort key Spell input and output numbers in words with first letter uppercase Spelling numbers
|$=€ Template:Hidden sort key Replace $-sign with a currency sign, for example in $/acre (no currency conversion happens) Cost per unit
|debug=yes Template:Hidden sort key Debugging only. In a sortable table: show the normally hidden sort key Table sort
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Number format
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt or Template:Xt Range format
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Symbol
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Order
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Number format
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Parts only
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Rounding and sigfig
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Order
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Order, rounding
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Number format
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Parts only
Template:!xt Template:Hidden sort key Deprecated. Use Template:Xt Rounding and sigfig


检索自“https://zh.wikivoyage.org/w/index.php?title=Template:Convert/doc&oldid=134778”