Unit Converter - Convert Units Online Free Unit Converter
Convert between units of length, weight, temperature, volume, area and time. Pick a category, enter a value and get instant results.
Convert Units
Conversion Result
Quick Reference
| From | To |
|---|
Unit Converter - Guide
What is Unit Conversion?
Unit conversion is the process of changing a measurement from one unit to another within the same category. It is essential in science, engineering, cooking, travel and everyday life. This converter handles the most common categories: Length, Weight, Temperature, Volume, Area and Time.
Length Conversions
Common Length Factors
1 kilometre = 1,000 metres = 0.6214 miles
1 mile = 1.6093 km = 5,280 feet
1 foot = 12 inches = 30.48 cm
1 inch = 2.54 cm
1 yard = 3 feet = 0.9144 m
Weight Conversions
Common Weight Factors
1 kilogram = 1,000 grams = 2.2046 pounds
1 pound = 16 ounces = 0.4536 kg
1 ounce = 28.3495 grams
1 metric ton = 1,000 kg
Temperature Conversions
Formulas
°F = (°C × 9/5) + 32
°C = (°F − 32) × 5/9
K = °C + 273.15
Volume Conversions
Common Volume Factors
1 litre = 1,000 millilitres
1 US gallon = 3.7854 litres
1 US quart = 0.9464 litres
1 US cup = 236.588 mL
1 US fluid ounce = 29.5735 mL
Area Conversions
Common Area Factors
1 km² = 1,000,000 m² = 0.3861 mi²
1 hectare = 10,000 m² = 2.4711 acres
1 acre = 43,560 ft² = 4,046.86 m²
1 ft² = 144 in² = 0.0929 m²
Time Conversions
Common Time Factors
1 hour = 60 minutes = 3,600 seconds
1 day = 24 hours = 86,400 seconds
1 week = 7 days
1 year ≈ 365.25 days ≈ 52.1775 weeks
How This Converter Works
- Choose a category: Select Length, Weight, Temperature, Volume, Area or Time.
- Enter a value: Type the number you want to convert.
- Pick units: Select the “From” and “To” units from the dropdowns.
- Instant result: The conversion updates in real time as you type or change selections.
- Swap: Click the swap button to reverse the conversion direction.
- Quick reference: A table shows common conversion amounts for the selected unit pair.