Online Unit Converter
Convert length, weight, volume, and temperature online with a fast, keyboard-friendly unit converter. Metric to imperial and everyday kitchen units—no sign-up, runs locally in your browser.
Result
How to Use the Quick Unit Converter
This tool is built for fast everyday conversions—students, travelers, cooks, and anyone who needs a simple metric to imperial converter without clutter.
- Choose a category: length, weight, volume, or temperature.
- Type a number (decimals and negatives allowed where valid).
- Pick the unit you are converting from and the unit you want.
- The result updates instantly—no submit button. Use Swap to reverse direction or Copy result to grab the formatted line.
Supported Unit Categories
The MVP focuses on common real-world units so the interface stays compact and usable on phones around 360–430px wide.
- Length: millimeter, centimeter, meter, kilometer, inch, foot, yard, mile.
- Weight: milligram, gram, kilogram, ounce, pound.
- Volume: milliliter, liter, teaspoon, tablespoon, cup, pint, quart, gallon (US liquid / customary kitchen measures).
- Temperature: Celsius, Fahrenheit, Kelvin (explicit formulas, not scaling).
Common Length, Weight, Volume, and Temperature Conversions
Handy reference examples people often search for alongside an online unit converter:
Length
1 meter ≈ 3.28084 feet; 1 inch = 2.54 cm; 1 mile ≈ 1.609 km.
Weight
1 kilogram ≈ 2.20462 pounds; 1 ounce ≈ 28.35 g for everyday avoirdupois weight.
Volume
1 liter = 1000 mL; 1 US liquid gallon = 4 quarts ≈ 3.785 L.
Temperature
0 °C = 32 °F; to convert Celsius to Kelvin, add 273.15.
Frequently Asked Questions
Is this unit converter accurate?
Yes. Length, weight, and volume use fixed conversion factors to a base unit (meter, gram, liter). Temperature uses standard Celsius, Fahrenheit, and Kelvin formulas—not multiplicative scaling.
Does the converter need the internet?
All math runs in your browser. After the page loads, conversions keep working offline with the same deterministic results.
What does Swap do?
Swap exchanges the “from” and “to” units and recalculates immediately, which is useful when you realize you picked units in the opposite direction.
Why do I see “Enter a valid number”?
The input must be a finite number. Empty, partial, or non-numeric input shows that message instead of NaN so the tool never looks broken.
Are cups and gallons US or imperial?
Kitchen volume units (teaspoon through gallon) use US customary / US liquid definitions, which is what most US recipes expect.
Can I copy the result?
Use Copy result to copy the full formatted line (value plus unit). If the Clipboard API is blocked, the tool falls back to a classic copy approach when possible.