Convert between units across multiple physical dimensions.
Features
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Multiple Categories: Length, mass, temperature, time, volume, etc.
-
Compound Units: Speed, density, pressure
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Precision Control: Configurable decimal places
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Batch Conversion: Convert lists of values
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Formula Display: Show conversion formulas
Quick Start
from unit_converter import UnitConverter
converter = UnitConverter()
# 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
# 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
| meter | m
| kilometer | km
| centimeter | cm
| millimeter | mm
| inch | in
| foot | ft
| yard | yd
| mile | mi
| nautical_mile | nm
Mass
| kilogram | kg
| gram | g
| milligram | mg
| pound | lb, lbs
| ounce | oz
| ton |
|---|
| metric_ton | tonne
Temperature
| celsius | c
| fahrenheit | f
| kelvin | k
Time
| second | s, sec
| minute | min
| hour | h, hr
| day | d
| week | wk
| month | mo
| year | yr
Volume
| liter | l
| milliliter | ml
| gallon | gal
| quart | qt
| pint | pt
| cup |
|---|
| fluid_ounce | fl_oz
| cubic_meter | m3
Area
| square_meter | m2, sqm
| square_kilometer | km2
| square_foot | sqft, ft2
| acre |
|---|
| hectare | ha
Speed
| meters_per_second | m/s, mps
| kilometers_per_hour | km/h, kph
| miles_per_hour | mph
| knots | kt
Digital Storage
| byte | b
| kilobyte | kb
| megabyte | mb
| gigabyte | gb
| terabyte | tb
Energy
| 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.