Short answer: for a one-off conversion, type it straight into your phone's search bar — "12 stone in kg" works. For anything repeated, use a converter app or web tool, which keeps both units selected and updates as you type. Watch for units with more than one definition, such as US versus imperial gallons.
Our Unit Converter app converts any unit instantly and works offline, so it's there even without signal.
Quick Reference: Common Unit Conversions
Length
| From | To | Multiply by |
|---|---|---|
| inches | cm | 2.54 |
| feet | meters | 0.3048 |
| miles | km | 1.60934 |
| cm | inches | 0.3937 |
| meters | feet | 3.2808 |
| km | miles | 0.6214 |
Weight / Mass
| From | To | Multiply by |
|---|---|---|
| pounds (lb) | kg | 0.4536 |
| kg | pounds | 2.2046 |
| ounces | grams | 28.3495 |
| grams | ounces | 0.0353 |
Temperature
- Celsius to Fahrenheit: (C x 9/5) + 32
- Fahrenheit to Celsius: (F - 32) x 5/9
- Celsius to Kelvin: C + 273.15
Volume
| From | To | Multiply by |
|---|---|---|
| gallons (US) | liters | 3.7854 |
| liters | gallons | 0.2642 |
| cups | ml | 236.588 |
| tablespoons | ml | 14.787 |
| fluid oz | ml | 29.574 |
Why Mental Math Isn't Enough
While you can memorize a few key conversions, real-world scenarios often require:
- Precise decimal values for cooking, construction, or science
- Uncommon units like nautical miles, hectares, or pascals
- Quick comparisons when shopping internationally
- Unit chains like converting cups to tablespoons to teaspoons
The Fastest Way to Convert Units
For instant, accurate conversions on the go, use the Unit Converter app by Yalintech:
- All unit types — length, weight, temperature, volume, area, speed, time, data storage, pressure, energy, and more
- Real-time results — see conversions as you type
- Works offline — no internet required
- Conversion history — quickly repeat recent calculations
- Favorites — save frequently used unit pairs
Category Deep Dives
Length Conversions
The most common conversions people search for:
- How many cm in an inch? 1 inch = 2.54 cm
- How many feet in a meter? 1 meter = 3.28 feet
- How many km in a mile? 1 mile = 1.609 km
Speed Conversions
- mph to km/h: multiply by 1.60934
- km/h to mph: multiply by 0.62137
- m/s to km/h: multiply by 3.6
- knots to km/h: multiply by 1.852
Data Storage
- 1 KB = 1,024 bytes
- 1 MB = 1,024 KB
- 1 GB = 1,024 MB
- 1 TB = 1,024 GB
Download Unit Converter on Android or App Store on iPhone for all your conversion needs.
