Convert between units of length, weight, volume, temperature, speed, and area instantly. Supports both metric and imperial systems with real-time results.
| Category | Common Conversion |
|---|---|
| Length | 1 inch = 2.54 cm | 1 mile = 1.609 km |
| Weight | 1 lb = 0.454 kg | 1 oz = 28.35 g |
| Volume | 1 gallon = 3.785 L | 1 fl oz = 29.57 mL |
| Temperature | °F = (°C × 9/5) + 32 |
| Speed | 1 mph = 1.609 km/h | 1 knot = 1.852 km/h |
| Area | 1 acre = 4,047 m² | 1 sq mi = 2.59 km² |
This free unit converter helps you get accurate results instantly without needing to work through the math manually. Whether you need a quick estimate or a precise figure, having a reliable tool on hand saves time and reduces errors compared to manual calculation.
Small errors in general calculations can compound into significant problems. A 1% miscalculation in a budget or measurement can translate to hundreds or thousands of dollars in wasted resources, or result in having to redo work entirely. This calculator uses the standard formulas and methods to give you reliable results you can trust.
Is this calculator free? Yes — completely free with no account, login, or payment required. Use it as many times as you need.
How accurate are the results? This calculator uses the standard formulas for unit converter calculations. Results are accurate for typical use cases. For specialized or high-stakes applications, consult a professional.
Does it work on mobile? Yes. This calculator is fully responsive and works on smartphones, tablets, and desktops.