Simple conversion

result = converter.convert(100, "km", "miles") print(f"100 km = {result:.2f} miles")

With full details

result = converter.convert_with_details(72, "fahrenheit", "celsius") print(result)


## CLI Usage

```bash
# Basic conversion
python unit_converter.py 100 km miles

# Temperature
python unit_converter.py 98.6 fahrenheit celsius

# With precision
python unit_converter.py 1.5 kg lbs --precision 4

# List supported units
python unit_converter.py --list

# List units in category
python unit_converter.py --list length

# Show formula
python unit_converter.py 100 cm inches --formula

API Reference

UnitConverter Class

class UnitConverter:
    def __init__(self)

    # Conversion
    def convert(self, value: float, from_unit: str, to_unit: str) -> float
    def convert_with_details(self, value: float, from_unit: str, to_unit: str) -> dict
    def batch_convert(self, values: list, from_unit: str, to_unit: str) -> list

    # Information
    def list_categories(self) -> list
    def list_units(self, category: str = None) -> dict
    def get_formula(self, from_unit: str, to_unit: str) -> str
    def find_unit(self, query: str) -> list

Supported Categories

Length

Unit	Aliases
meter	m
kilometer	km
centimeter	cm
millimeter	mm
inch	in
foot	ft
yard	yd
mile	mi
nautical_mile	nm

Mass

Unit	Aliases
kilogram	kg
gram	g
milligram	mg
pound	lb, lbs
ounce	oz
ton
metric_ton	tonne

Temperature

Unit	Aliases
celsius	c
fahrenheit	f
kelvin	k

Time

Unit	Aliases
second	s, sec
minute	min
hour	h, hr
day	d
week	wk
month	mo
year	yr

Volume

Unit	Aliases
liter	l
milliliter	ml
gallon	gal
quart	qt
pint	pt
cup
fluid_ounce	fl_oz
cubic_meter	m3

Area

Unit	Aliases
square_meter	m2, sqm
square_kilometer	km2
square_foot	sqft, ft2
acre
hectare	ha

Speed

Unit	Aliases
meters_per_second	m/s, mps
kilometers_per_hour	km/h, kph
miles_per_hour	mph
knots	kt

Digital Storage

Unit	Aliases
byte	b
kilobyte	kb
megabyte	mb
gigabyte	gb
terabyte	tb

Energy

Unit	Aliases
joule	j
kilojoule	kj
calorie	cal
kilocalorie	kcal
watt_hour	wh
kilowatt_hour	kwh

Example Workflows

Batch Conversion

converter = UnitConverter()
weights_kg = [50, 75, 100, 125]
weights_lbs = converter.batch_convert(weights_kg, "kg", "lbs")
for kg, lbs in zip(weights_kg, weights_lbs):
    print(f"{kg} kg = {lbs:.1f} lbs")

Find Compatible Units

converter = UnitConverter()
# Search for units
matches = converter.find_unit("meter")
# Returns: ['meter', 'kilometer', 'centimeter', ...]

Get Conversion Formula

converter = UnitConverter()
formula = converter.get_formula("celsius", "fahrenheit")
print(formula)  # "F = (C × 9/5) + 32"

Output Format

convert_with_details()

{
    "value": 100,
    "from_unit": "km",
    "to_unit": "miles",
    "result": 62.1371,
    "formula": "miles = km × 0.621371",
    "category": "length"
}

Dependencies

No external dependencies - uses Python standard library.

unit-converter

Unit Converter

Features

Quick Start