Unit Converter
Convert between units across multiple physical dimensions.
Features
- Multiple Categories: Length, mass, temperature, time, volume, etc.
- Compound Units: Speed, density, pressure
- Precision Control: Configurable decimal places
- Batch Conversion: Convert lists of values
- 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
| 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.
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