Scientific
Unit Converter
Convert between length, weight, temperature, area, volume, and speed units instantly. Includes a full conversion table for every supported unit.
—
Frequently Asked Questions
How accurate is the unit converter?
Conversions use exact or high-precision coefficients (e.g., 1 mile = 1609.344 metres exactly by international definition). Results are displayed to up to 8 significant figures. For scientific work, validate against primary reference standards.
Which temperature formula is used?
Standard formulas: °C to °F = (°C × 9/5) + 32. °C to Kelvin = °C + 273.15. Kelvin is the SI base unit for thermodynamic temperature and is always positive.
Can I convert very large or very small numbers?
Yes. The converter automatically switches to scientific notation (e.g., 3.5e-9) for very small results, keeping the display readable regardless of magnitude.
What does the swap button do?
The swap button instantly reverses the from/to unit selection and recalculates. Useful when you want the reverse conversion — e.g., switch from "miles to km" to "km to miles" instantly.