Recent Conversions
Unit Converter — Convert Length, Weight, Temperature & More
Whether you're a student studying science, a DIY home renovator following an overseas tutorial, a traveler navigating foreign measurements, or a professional working with international specifications — unit conversion is an everyday necessity. Our free unit converter supports five categories (length, weight, temperature, volume, and speed) with dozens of units in each, making it easy to switch between metric, imperial, and other measurement systems.
Conversions update instantly as you type — no button pressing needed. Simply select your category, enter a value, choose the source and target units, and the converted result appears immediately. A swap button lets you reverse the conversion direction, and your recent conversions are saved to a handy history list so you can revisit them later.
Behind the scenes, every conversion uses precise formulas and conversion factors. Temperature conversions handle the different scaling (Celsius, Fahrenheit, Kelvin), while length, weight, volume, and speed all use consistent multiplicative factors with high precision.
How to Use the Unit Converter
- Select a categoryClick on one of the category pills — Length, Weight, Temperature, Volume, or Speed. The unit dropdowns will update to show relevant units for that category.
- Enter a valueType or paste the number you want to convert in the Value field. Decimal values are supported (e.g., 1.5, 3.14).
- Choose unitsSelect the unit you're converting from in the first dropdown, and the unit you want to convert to in the second dropdown. Use the swap button (⇄) to quickly reverse them.
- View the resultThe converted value appears instantly below with full precision formatting. A conversion formula reference is shown beneath the result.
- Reference historyYour recent conversions are saved in the history list. Click on any history item to re-run that conversion, or click Clear all to reset.
Common Conversion Examples
📏 1 meter = 3.281 feet
Useful for construction, room dimensions, and understanding product specifications from other countries.
⚖️ 1 kilogram = 2.205 pounds
Essential for cooking, shipping, fitness tracking, and comparing product weights internationally.
🌡️ 0°C = 32°F
Perfect for weather forecasts, cooking recipes, scientific experiments, and travel planning.
🧪 1 liter = 0.264 gallons
Important for fuel economy, beverage containers, and liquid measurements in recipes and industries.
Frequently Asked Questions
The converter supports over 60 units across five categories: length (19 units), weight/mass (15 units), temperature (3 scales), volume (15 units), and speed (10 units). From common units like meters and feet to specialized ones like nautical miles and knots.
Yes! Temperature conversions use the exact formulas: °F = (°C × 9/5) + 32, °C = (°F − 32) × 5/9, K = °C + 273.15. Results are displayed with up to 2 decimal places for precision.
Absolutely. Every category includes both metric and imperial units (and sometimes others like nautical or scientific units). Simply select your source unit from the first dropdown and your target unit from the second — the converter handles the math automatically.
Yes! Your last 15 conversions are stored in the history panel below the converter. Click on any history entry to instantly re-run that conversion. History is cleared when you close the page or tap Clear all.
All conversion factors (except temperature) are based on their relationship to a standard base unit (meter for length, kilogram for weight, liter for volume, m/s for speed). Each unit stores its multiplier relative to that base. When converting, the tool converts from the source unit to the base, then from the base to the target unit, ensuring maximum precision.
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