Convert length, weight, and temperature instantly. Clean, fast, and accurate.
Fast and Accurate Unit Converter
Convert between common units across three categories—length, weight, and temperature—with instant results. The interface is designed for clarity on both desktop and mobile, and all calculations happen locally in your browser for speed and privacy.
Choose a tab, enter a value, and select the From and To units
Tap Convert for an immediate answer formatted for readability
Use Swap to flip units or Clear to reset inputs
Tips and notes
For temperature, formulas are applied exactly (e.g., °F = °C × 9/5 + 32)
Results are rounded sensibly; use smaller inputs for more precision
Great for homework checks, recipes, travel, and quick everyday calculations
Results are formatted for readability and rounded sensibly. For exact scientific work, consider the appropriate number of significant figures and verify standards relevant to your field.
Examples
Length: 2.54 cm → 1 in, 5 mi → 8.04672 km
Weight: 12 oz → 0.75 lb, 3.5 kg → 7.71618 lb
Temperature: 100 °C → 212 °F, 300 K → 26.85 °C
Accuracy and rounding
The converter uses well‑known factors (e.g., 1 in = 2.54 cm exactly; 1 lb = 0.45359237 kg). Outputs are rounded to keep values readable; enter smaller inputs if you need more precision.
Privacy and offline use
Calculations run in your browser. Your inputs are not uploaded, and core conversions work even without a network connection after the page loads.