> ## Documentation Index > Fetch the complete documentation index at: https://docs.wellapp.ai/llms.txt > Use this file to discover all available pages before exploring further. # Invoice Line Unit > UN/CEFACT standard units of measure for invoice line items ## Overview The `unit` field specifies the unit of measure for invoice line items, based on **UN/CEFACT Recommendation 20** - the international standard for units of measure in business transactions. **Current Implementation**: `"EA, HOUR, KG, etc."` **Field Type**: `string` **Required**: No (optional) **Standard**: UN/CEFACT Recommendation 20 (ISO 80000) **Format**: 1-3 character codes *** ## Complete Unit of Measure Enum ### 📦 Quantity & Count Units

Code	Full Name	Description	Common Usage	Examples
EA	Each	Individual items	Products, licenses	"5 EA software licenses"
PC	Piece	Individual pieces	Parts, components	"10 PC circuit boards"
SET	Set	Collection of items	Tool sets, kits	"2 SET office furniture"
PR	Pair	Two matching items	Shoes, gloves	"3 PR safety gloves"
DZ	Dozen	12 pieces	Bulk items	"4 DZ pencils"
C62	Hundred	100 pieces	Large quantities	"2 C62 business cards"
MIL	Thousand	1000 pieces	Volume sales	"5 MIL paper sheets"
KT	Kit	Assembly kit	Products with parts	"1 KT starter package"
PK	Pack	Packaged quantity	Consumer goods	"10 PK batteries"
BX	Box	Boxed items	Shipping units	"3 BX printer paper"

### ⏱️ Time-Based Units

Code	Full Name	Description	Common Usage	Examples
HUR	Hour	60 minutes	Services, consulting	"40 HUR development work"
MIN	Minute	Time unit	Call charges, usage	"120 MIN phone calls"
SEC	Second	Time unit	Computing, processing	"3600 SEC server time"
DAY	Day	24 hours	Rentals, subscriptions	"30 DAY hosting service"
WEE	Week	7 days	Project durations	"4 WEE consulting project"
MON	Month	Calendar month	Subscriptions, leases	"12 MON software license"
ANN	Annual	Yearly	Annual contracts	"1 ANN support contract"
QT	Quarter	3 months	Quarterly services	"4 QT maintenance plan"

### ⚖️ Weight & Mass Units

Code	Full Name	Description	Common Usage	Examples
KGM	Kilogram	1000 grams	Products, shipping	"25 KGM raw materials"
GRM	Gram	Basic weight unit	Small items	"500 GRM precious metals"
TNE	Metric Ton	1000 kilograms	Bulk materials	"2 TNE steel beams"
LBR	Pound	Imperial weight	US market	"100 LBR equipment"
ONZ	Ounce	Imperial weight	Precious materials	"10 ONZ gold"
CWT	Hundredweight	100 pounds	Agriculture, mining	"5 CWT grain"
STN	Short Ton	2000 pounds (US)	US bulk materials	"3 STN coal"
LTN	Long Ton	2240 pounds (UK)	UK shipping	"1 LTN cargo"

### 📏 Length & Distance Units

Code	Full Name	Description	Common Usage	Examples
MTR	Meter	Base length unit	Materials, cables	"100 MTR ethernet cable"
CMT	Centimeter	0.01 meter	Small measurements	"50 CMT fabric trim"
MMT	Millimeter	0.001 meter	Precision items	"25 MMT steel wire"
KMT	Kilometer	1000 meters	Transportation	"500 KMT delivery service"
INH	Inch	Imperial length	US market	"12 INH steel pipe"
FOT	Foot	12 inches	Construction	"100 FOT lumber"
YRD	Yard	3 feet	Textiles, landscaping	"50 YRD fabric"
SMI	Statute Mile	5280 feet	Transportation	"1000 SMI shipping"

### 📐 Area Units

Code	Full Name	Description	Common Usage	Examples
MTK	Square Meter	Area unit	Real estate, flooring	"200 MTK office space"
CMK	Square Centimeter	Area unit	Small surfaces	"500 CMK labels"
INK	Square Inch	Imperial area	US manufacturing	"144 INK material"
FTK	Square Foot	Imperial area	Real estate (US)	"2000 FTK warehouse"
YDK	Square Yard	Imperial area	Carpeting, landscaping	"100 YDK carpet"
ACR	Acre	Land measurement	Agriculture, real estate	"5 ACR farmland"
HAR	Hectare	10,000 sq meters	Land (metric)	"2 HAR industrial plot"

### 🫗 Volume & Capacity Units

Code	Full Name	Description	Common Usage	Examples
LTR	Liter	Volume unit	Liquids, chemicals	"500 LTR fuel"
MLT	Milliliter	0.001 liter	Small volumes	"250 MLT reagent"
MTQ	Cubic Meter	Volume unit	Gas, storage	"100 MTQ storage"
CMQ	Cubic Centimeter	Small volume	Precision liquids	"10 CMQ samples"
INQ	Cubic Inch	Imperial volume	US manufacturing	"500 INQ capacity"
FTQ	Cubic Foot	Imperial volume	US shipping	"50 FTQ cargo"
YDQ	Cubic Yard	Imperial volume	Construction materials	"10 YDQ concrete"
GAL	Gallon	Liquid measure (US)	Fuel, chemicals	"100 GAL gasoline"
QT	Quart	0.25 gallon	Smaller liquids	"8 QT motor oil"
PT	Pint	0.5 quart	Consumer liquids	"16 PT beverages"

### 💻 Digital & Technology Units

Code	Full Name	Description	Common Usage	Examples
BYT	Byte	Data unit	Storage, bandwidth	"1024 BYT data"
KBY	Kilobyte	1024 bytes	Small files	"500 KBY documents"
MBY	Megabyte	1024 KB	Files, media	"100 MBY video files"
GBY	Gigabyte	1024 MB	Storage, transfer	"50 GBY cloud storage"
TBY	Terabyte	1024 GB	Large storage	"5 TBY backup space"
BIT	Bit	Basic data unit	Bandwidth, processing	"1000000 BIT transfer"
KBI	Kilobit	1000 bits	Network speeds	"100 KBI connection"
MBI	Megabit	1000 kilobits	Internet speeds	"50 MBI bandwidth"
GBI	Gigabit	1000 megabits	High-speed networks	"10 GBI fiber link"

### 🔌 Energy & Power Units

Code	Full Name	Description	Common Usage	Examples
KWH	Kilowatt Hour	Energy unit	Electricity billing	"1500 KWH power usage"
MWH	Megawatt Hour	1000 KWH	Industrial power	"5 MWH facility power"
WHR	Watt Hour	Energy unit	Small devices	"500 WHR battery"
KWT	Kilowatt	Power unit	Equipment rating	"10 KWT generator"
MWT	Megawatt	1000 kilowatts	Large systems	"2 MWT solar farm"
BTU	British Thermal Unit	Heat energy	HVAC, heating	"50000 BTU heater"
CAL	Calorie	Energy unit	Food, chemistry	"2000 CAL nutrition"

### 🌡️ Temperature & Scientific Units

Code	Full Name	Description	Common Usage	Examples
CEL	Celsius	Temperature	Scientific, global	"25 CEL operating temp"
FAH	Fahrenheit	Temperature	US market	"77 FAH room temp"
KEL	Kelvin	Absolute temperature	Scientific	"298 KEL reaction temp"
BAR	Bar	Pressure unit	Industrial pressure	"10 BAR system pressure"
PSI	Pounds per Sq Inch	Pressure (Imperial)	US industrial	"150 PSI tire pressure"
PAL	Pascal	Pressure unit	Scientific pressure	"101325 PAL atmospheric"

### 🎯 Service & Usage Units

Code	Full Name	Description	Common Usage	Examples
SRV	Service	Service unit	Professional services	"1 SRV consultation"
LIC	License	License unit	Software licensing	"50 LIC user accounts"
USR	User	Per user	SaaS, subscriptions	"100 USR monthly plan"
SES	Session	Usage session	Online services	"1000 SES API calls"
TXN	Transaction	Per transaction	Payment processing	"500 TXN payment fees"
REQ	Request	API/service request	Cloud services	"10000 REQ API usage"
PAG	Page	Per page	Printing, scanning	"500 PAG document scan"
VIS	Visit	Website visit	Analytics, marketing	"10000 VIS ad campaign"
CLI	Click	Click-through	Digital advertising	"5000 CLI ad clicks"
IMP	Impression	Ad impression	Digital marketing	"100000 IMP display ads"

### 💰 Financial & Currency Units

Code	Full Name	Description	Common Usage	Examples
PTC	Percent	Percentage	Commission, rates	"5 PTC commission rate"
BPS	Basis Points	0.01 percent	Financial rates	"250 BPS interest"
SHR	Share	Stock share	Equity transactions	"1000 SHR stock option"
LOT	Lot	Trading lot	Securities trading	"10 LOT futures contract"
PNT	Point	Price point	Trading, scoring	"100 PNT bonus points"

### 🏭 Industrial & Manufacturing Units

Code	Full Name	Description	Common Usage	Examples
TOL	Tool	Manufacturing tool	Equipment, tooling	"5 TOL cutting dies"
MOL	Mole	Chemical quantity	Chemistry, pharma	"2 MOL reagent"
PPM	Parts Per Million	Concentration	Quality control	"50 PPM impurities"
PPB	Parts Per Billion	Concentration	Precision analysis	"10 PPB contamination"
PH	pH Unit	Acidity measure	Chemistry, water	"7 PH neutral solution"

### ❓ Fallback & Generic Units

Code	Full Name	Description	Common Usage	Examples
UNT	Unit	Generic unit	Unspecified items	"10 UNT miscellaneous"
OTH	Other	Other unit	Special cases	"5 OTH custom items"
NA	Not Applicable	No unit needed	Services, fees	"1 NA setup fee"

## Implementation Guidelines ### Priority Tiers for Implementation ### **🔴 Tier 1 - Critical (Implement First)** * **`EA`** - Each (most common) * **`HUR`** - Hour (services) * **`KGM`** - Kilogram (weight) * **`LTR`** - Liter (volume) * **`MTR`** - Meter (length) * **`PC`** - Piece * **`SET`** - Set * **`DAY`** - Day * **`MON`** - Month ### **🟡 Tier 2 - Important (Second Priority)** * **`MIN`** - Minute * **`GRM`** - Gram * **`CMT`** - Centimeter * **`MLT`** - Milliliter * **`DZ`** - Dozen * **`BX`** - Box * **`PK`** - Pack * **`KT`** - Kit * **`SRV`** - Service * **`LIC`** - License ### **🟢 Tier 3 - Extended Coverage** * Digital units (BYT, KBY, MBY, GBY) * Imperial units (INH, FOT, YRD, GAL) * Scientific units (CEL, BAR, MOL) * Financial units (PTC, BPS, SHR) * Specialized industry units (See above for file contents.)