Unit Converter
Convert length, weight, temperature, volume, area, speed, data and time units instantly — all in one place.
About this calculator
This free unit converter handles every common everyday conversion in one place. Choose a category — length, weight, temperature, volume, area, speed, digital data, or time — type a value, pick the unit you are converting from, and instantly see the equivalent in all other units in that category.
Temperature uses the exact Celsius–Fahrenheit–Kelvin formulas, and every other category uses standard conversion factors. Click any result to copy it. It is perfect for cooking, travel, study, engineering, and quick day-to-day conversions like cm to inches or kg to lbs — all running locally in your browser.
Why use this tool
Every category
Convert length, weight, temperature, volume, area, speed, data and time.
All units at once
Enter a value and read every equivalent unit instantly.
Accurate
Uses exact formulas and standard conversion factors.
Common use cases
- Convert cm to inches or kg to lbs
- Switch Celsius and Fahrenheit
- Convert units while cooking or travelling
- Handle quick engineering or study conversions
Frequently asked questions
Length, weight/mass, temperature, volume, area, speed, digital data, and time — each with the common metric and imperial units.
Pick the Temperature tab, enter your value, and choose °C as the from-unit; the °F result appears instantly using °F = (°C × 9/5) + 32.
Yes. Enter a value once and every unit in that category updates simultaneously, so you can read off any conversion.
Yes — click any result to copy it to your clipboard.
It uses standard conversion factors and is accurate for everyday use; extremely large or small values are shown in scientific notation.