Every common conversion in one place
Quick-reference tables for length, weight, volume, and temperature, plus a full converter for any other value.
Quick reference tables
The most frequently looked-up conversions, ready without typing a number.
Length
| Unit | Equals |
|---|---|
| 1 inch | 2.54 cm |
| 1 foot | 30.48 cm (0.3048 m) |
| 1 yard | 0.9144 m |
| 1 mile | 1.60934 km |
| 1 meter | 3.281 ft |
| 1 kilometer | 0.621 miles |
Weight
| Unit | Equals |
|---|---|
| 1 ounce | 28.35 g |
| 1 pound | 453.6 g (0.4536 kg) |
| 1 kilogram | 2.205 lb |
| 1 stone | 6.35 kg |
| 1 gram | 0.0353 oz |
Volume
| Unit | Equals |
|---|---|
| 1 teaspoon | 4.93 ml |
| 1 tablespoon | 14.79 ml |
| 1 cup | 236.6 ml |
| 1 US pint | 473.2 ml |
| 1 US quart | 0.946 L |
| 1 US gallon | 3.785 L |
| 1 liter | 4.227 cups |
Temperature
| Unit | Equals |
|---|---|
| 0°C | 32°F |
| 20°C | 68°F |
| 37°C | 98.6°F |
| 100°C | 212°F |
| 180°C | 356°F |
| 350°F | 177°C |
Need an ingredient-specific cooking conversion or a volume in cubic feet? Try the grams to cups calculator, grams to tablespoons calculator, or the cubic feet calculator.
About this common conversions page
Some conversions come up so often — inches to centimeters, pounds to kilograms, Celsius to Fahrenheit — that it's faster to have them all in one place than to search for each one individually. This page collects the most frequently needed length, weight, volume, and temperature conversions, alongside a full interactive converter for anything more specific.
The reference tables below use fixed, exact conversion factors (for example, 1 inch = 2.54 cm exactly, by international agreement), so they're reliable for quick lookups without needing a calculator for common values like a foot, a pound, or a gallon.
For values that aren't listed, or for ingredient-specific cooking conversions, the interactive converter above handles any number, and the linked calculators below cover more specialized conversions — grams to cups and tablespoons for baking, cubic feet for volume, and square footage for area.
Common conversion questions
Quick answers for the most frequently searched conversions.
How many centimeters are in an inch?
2.54 centimeters, exactly — this is the internationally defined conversion factor.
How many kilograms are in a pound?
0.4536 kilograms, or about 453.6 grams, per pound.
How do I convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5, then add 32. For example, 20°C x 1.8 = 36, plus 32 = 68°F.
How many cups are in a liter?
About 4.227 US cups per liter, since one US cup is 236.6 ml.
How many feet are in a meter?
About 3.281 feet per meter.
Where can I find ingredient-specific cooking conversions?
Use the dedicated grams to cups or grams to tablespoons calculators linked below — general length and weight conversions don't apply to cooking, since a cup or tablespoon of different ingredients weighs different amounts.