Unit Converter
Convert between different units of measurement.
Real-Time Bidirectional Sync
Type into either input box or tap swap to see instantaneous recalculations across imperial and metric systems without page reloads.
High Scientific Precision
Calculations adhere strictly to International System of Units (SI) definitions and NIST standards with accurate scientific decimal formatting.
100% In-Browser Privacy
Your computations and unit inputs are never transmitted across the network or stored in databases. Total confidentiality guaranteed.
100% Free with No Limits
Enjoy unlimited calculations across all categories without intrusive popups, registration requirements, or paid subscriptions.
How to Use the Free Online Unit Converter
Effortlessly translate measurements between imperial and metric systems:
Select Measurement Category
Choose from Length, Weight, Temperature, Area, Volume, Speed, Digital Data, Time, or Pressure.
Choose From & To Units
Pick your source and destination units. Click the swap button (β) at any time to reverse directions.
Type & Copy Result
Enter any numeric value to see the converted result immediately. Click "Copy" to paste it into your documents.
Metric (SI) vs. Imperial / US Customary Measurement Standards
A technical summary of base units and standard conversion ratios:
| Measurement Domain | Metric System (SI) | Imperial / US Customary | Exact Conversion Constant |
|---|---|---|---|
| Length & Distance | Meter (m), Kilometer (km), Centimeter (cm) | Inch (in), Foot (ft), Yard (yd), Mile (mi) | 1 in = 2.54 cm; 1 mi = 1.609344 km |
| Mass & Weight | Gram (g), Kilogram (kg), Metric Ton (t) | Ounce (oz), Pound (lb), Stone (st) | 1 lb = 0.45359237 kg |
| Temperature | Celsius (Β°C), Kelvin (K) | Fahrenheit (Β°F) | Β°F = (Β°C Γ 9/5) + 32 |
| Liquid Volume | Liter (L), Milliliter (mL) | Fluid Ounce (fl oz), Pint (pt), US Gallon (gal) | 1 US gal = 3.78541 L; 1 UK gal = 4.54609 L |
| Speed & Velocity | Meters per second (m/s), Kilometers per hour (km/h) | Miles per hour (mph), Knot (kn) | 1 mph = 1.609344 km/h; 1 kn = 1.852 km/h |
| Pressure | Pascal (Pa), Bar, Standard Atmosphere (atm) | Pounds per square inch (psi), Torr (mmHg) | 1 atm = 101,325 Pa = 14.6959 psi |
Explore Related Conversion Tools
Need to convert time zones, media assets, or documents? Check out our complete suite:
π Free Online Unit Converter Guide
Use our web-based **Unit Converter** to process your files securely without installing software. Because processing happens entirely inside your browser sandbox via WebAssembly (WASM), your confidential files are never uploaded to any remote server.
β‘ Fast & Unlimited
Enjoy unlimited free conversions. No daily quotas, account registrations, or watermarks attached.
π» Universal Compatibility
Compatible with all modern browsers across desktop, tablet, and mobile devices without installation requirements.