Temperature, Metric, and Imperial Unit Converter
Convert everyday measurements across length, weight, temperature, and volume with instant browser-side calculations.
Convert metric and imperial measurements
Choose length to convert meters, kilometers, centimeters, or millimeters to inches, feet, yards, or miles. Weight includes grams, kilograms, milligrams, ounces, pounds, and stones. Temperature and common volume units use their own formulas and menus.
This calculator converts one value at a time. The dynamic table compares several common values for the selected units. It does not create a downloadable or printable reference chart, convert metric prefixes without a measurement, or provide engineering tolerances. Keep enough decimal places for the task and verify medical, scientific, trade, or regulated measurements against an approved reference.
Common US customary and metric conversion chart
| US customary | Metric equivalent |
|---|---|
| 1 inch | 25.4 millimeters |
| 1 foot | 0.3048 meters |
| 1 mile | 1.609344 kilometers |
| 1 ounce | 28.349523125 grams |
| 1 pound | 0.45359237 kilograms |
| 1 US fluid ounce | 29.5735296 milliliters |
| 1 US gallon | 3.785411784 liters |
US customary and British Imperial liquid measures are not interchangeable. The volume values in this calculator use US fluid ounces, cups, pints, quarts, and gallons. Use Pounds and Ounces to Kilograms for a combined mixed-weight input.
How this tool helps
Unit conversion is easy to get wrong when a recipe, shipping label, design brief, classroom assignment, or product listing uses a different measurement system than you expected. This converter keeps the common metric and imperial choices together so you can switch categories quickly and verify the number before using it.
How to use it
- Choose the measurement category first, because length, weight, volume, and temperature use different formulas.
- Enter the source value and select the original unit from the first menu.
- Pick the target unit and review the rounded result; copy the value only after checking that the category is correct.
Practical tips
- Temperature conversion is not a simple multiplier, so avoid reusing length or weight shortcuts for Celsius and Fahrenheit.
- For product specifications, keep enough decimals to avoid changing a size or weight in a meaningful way.
- When a platform asks for a unit explicitly, match that unit exactly instead of entering a converted number with the old label.
FAQ
Which units are included?
The converter covers common length, weight, temperature, and volume units used in everyday web and office tasks.
Why do some results have decimals?
Many conversions are not whole numbers, so the tool rounds the displayed result while keeping practical precision.
Can I use this for engineering work?
Use it for quick checks, but verify critical engineering, medical, or regulated measurements with an approved reference.
Related tools
Celsius, Fahrenheit, and Kelvin temperature converter
Open the unit converter, choose temperature, then convert Celsius, Fahrenheit, or Kelvin and compare common values in a table. The temperature mode uses the same canonical calculator page.
Temperature formulas are different from length, mass, and volume ratios. Verify scientific, medical, industrial, or regulated measurements against an approved reference and retain appropriate precision.
Converting from metric to imperial units
Metric to imperial conversion covers length (meters to feet/inches), weight (kilograms to pounds/ounces), temperature (Celsius to Fahrenheit), and volume (liters to gallons). The most common conversions: multiply meters by 3.281 for feet, kilograms by 2.205 for pounds, and multiply Celsius by 1.8 then add 32 for Fahrenheit.
Use the converter above for instant results. Select the unit pair, enter the value, and the converted result appears immediately. Bookmark this page for quick reference when reading recipes, following DIY instructions, or interpreting product specifications from different regions.
Converting US customary units
US customary units include inches, feet, yards, miles for length; ounces, pounds, tons for weight; and cups, pints, quarts, gallons for volume. To convert inches to centimeters, multiply by 2.54. To convert Fahrenheit to Celsius, subtract 32 then multiply by 5/9. To convert pounds to kilograms, multiply by 0.4536.
The converter above handles all common customary-to-metric pairs. Select the category (length, weight, volume, or temperature), choose the from/to units, and enter a value. For cooking measurements, note that 1 US cup = 236.6 mL and 1 US tablespoon = 14.79 mL. Bookmark this page for quick reference when following international recipes or interpreting product specifications from non-US sources.