Unit Converter
Instantly convert between units of length, weight, volume, temperature, and live currency exchange rates. Swap units with one click and save your favorite conversions.
How It Works
- Select a category: length, weight, volume, temperature, or currency.
- Choose your source and target units from the dropdowns.
- Enter a value and see the instant conversion result.
- Use the swap button to reverse units, or star to save favorites.
A Guide to Unit Conversion
Unit conversion is something most people encounter daily, whether measuring ingredients for a recipe, comparing product sizes while shopping, or converting temperatures when traveling abroad. The metric system (meters, kilograms, liters) is used by most of the world, while the United States primarily uses the imperial system (feet, pounds, gallons). Being able to convert between these systems quickly is an essential practical skill.
Temperature conversion is one of the most common needs for travelers. Water freezes at 0°C (32°F) and boils at 100°C (212°F). A comfortable room temperature is about 20-22°C (68-72°F). Body temperature is approximately 37°C (98.6°F). These reference points can help you quickly estimate temperatures without a calculator.
Our converter also includes live currency exchange rates, updated regularly. Currency values fluctuate based on economic conditions, interest rates, trade balances, and market sentiment. For travel or business purposes, it is wise to check current rates frequently and be aware that banks and exchange services often charge a margin above the mid-market rate.
Tips & Best Practices
- ✓Use the favorites feature to save your most commonly used conversions for quick access.
- ✓For cooking, remember that 1 cup is approximately 237 mL and 1 tablespoon is about 15 mL.
- ✓When converting temperature, remember that ‐16 and 61”: 16°C is approximately 61°F.
- ✓Currency rates change constantly. Check rates close to the time of your actual transaction for the most accurate conversion.
- ✓The swap button lets you quickly reverse a conversion without retyping values.
Frequently Asked Questions
How accurate are the unit conversions?
All unit conversions use exact mathematical formulas and conversion factors. Results are accurate to multiple decimal places. Currency conversions use live exchange rates from a third-party API and are indicative, not guaranteed for financial transactions.
Where do the currency exchange rates come from?
Currency rates are fetched from the Exchange Rate API, which aggregates rates from multiple financial sources. Rates are updated regularly and reflect the mid-market exchange rate. Actual rates from banks or exchange services may include additional fees or margins.
Can I convert between metric and imperial units?
Yes, the converter supports full cross-conversion between metric and imperial systems for length, weight, and volume. Select your source and target units from the dropdown menus and the conversion happens instantly.
Why are there different measurement systems?
The metric system was developed in France during the 18th century and adopted internationally for its logical base-10 structure. The imperial system evolved from various English measurement traditions. Most countries now use metric, while the United States, Liberia, and Myanmar still primarily use imperial measurements.