Private · Free · No signup
Unit Converter
Whether you’re following a recipe, reading a road sign abroad, or converting a shipping weight, this converter covers everyday length, weight, volume, and temperature units.
Last reviewed July 30, 2026.
When to use this
- Converting miles to kilometers for travel or fitness apps
- Translating cups and ounces in cooking
- Switching between Fahrenheit and Celsius for weather or ovens
Worked examples
1 mile ≈ 1.609344 km. 32°F = 0°C. 1 US cup = 236.5882365 ml. 1 lb = 0.45359237 kg.
Common mistakes
- Mixing US fluid ounces with weight ounces
- Using imperial UK gallons interchangeably with US gallons
- Treating kitchen volume conversions as lab-grade precision
How it works
Linear units convert through a meter, kilogram, or liter base using exact factors where standards define them. Temperature uses the standard °C/°F/K formulas.
How to use
- Pick length, weight, volume, or temperature.
- Enter a value and choose the from/to units.
- Read the converted result.
FAQ
Are cooking volumes US or metric cups?
Volume units here use US customary measures (US cup, US gallon, etc.).
How precise are the results?
We keep enough decimals for practical use. For legal metrology or lab work, use certified references.
Why is temperature separate from other units?
Temperature scales are affine (offset + scale), not simple ratios like length.
Can I convert data sizes (MB/GB)?
Not in this tool—only length, weight, volume, and temperature.
Related tools
Tip Calculator
Calculate tip, add tax, and split the bill evenly or by shares.
Sales Tax
Add or remove sales tax using approximate rates for all 50 states and D.C.
Mortgage
Estimate monthly payment with principal, interest, taxes, insurance, PMI, and extra payments.
Auto Loan
Estimate car payments with down payment, trade-in, tax, and fees.