Category
Conversions
Unit Converter
Convert between different units of measurement
Estimated time
30 sec
Select Category
Convert quickly across common measurement categories with instant updates.
Enter the amount to convert from the selected source unit. Conversions use standard unit factors for each category.
Result updates using the selected target unit and standard conversion factors. Displayed values are rounded for readability.
Common Conversions
1 mile = 1.609 km
1 inch = 2.54 cm
1 foot = 0.305 m
1 yard = 0.914 m
1 lb = 0.454 kg
1 oz = 28.35 g
1 kg = 2.205 lbs
1 ton = 1000 kg
1 gal = 3.785 L
1 cup = 236.6 mL
1 qt = 0.946 L
1 fl oz = 29.57 mL
0C = 32F
100C = 212F
-40C = -40F
0 K = -273.15C
1 mph = 1.609 km/h
1 knot = 1.852 km/h
1 m/s = 3.6 km/h
100 km/h = 62.1 mph
How It Works
This converter uses standard conversion factors and a base-unit method for consistent cross-unit conversions.
Temperature is converted using dedicated formulas through Celsius as an intermediate unit.
- Pick a category first so only compatible units are available.
- Most categories convert through a shared base unit for consistency.
- Temperature uses direct equations rather than a single multiplier.
- Results update instantly when value, category, or units change.
Example Conversions
Distance
10 miles
16.09 kilometers
Weight
150 pounds
68.04 kilograms
Volume
2 gallons
7.57 liters
Temperature
72F
22.22C
Frequently Asked Questions
Are these conversions accurate?
Yes. Standard published conversion factors are used across all categories.
What's the difference between US and UK units?
This calculator uses US customary units where relevant, such as US gallons.
How do I convert temperature?
Choose Temperature and select source/target units. The calculator applies exact formulas automatically.
Can more categories be added?
The current set includes the most common categories. Additional categories can be added later.