You are checking dimensions, package weights, room areas, recipe volumes, or everyday metric-imperial equivalents.
Unit Converter
Convert common length, weight, area, and volume units for everyday measurements, recipes, room size, packages, and metric-imperial checks.
Start here
Choose a unit category.
Browser-first
Your conversion values are processed locally in your browser and are not uploaded to a server.
Useful for
Convert metric and imperial units
Result1 in = 2.54 cm
Quick answer
Convert common length, weight, area, and volume units
Choose a measurement category, enter a value and source unit, then read the equivalent in the target unit. Metric and common US customary units are included.
Temperature and pressure use separate converters, and rounded results should not replace engineering or regulated measurement requirements.
Percentage Calculator: Calculate percent of a number, percentage change, discount percentage, part-of-total questions, and percentage-point differences in your browser.
About this tool
Convert common length, weight, area, and volume units for everyday measurements, recipes, room size, packages, and metric-imperial checks.
Your conversion values are processed locally in your browser and are not uploaded to a server.
How to use it
- Choose a unit category.
- Enter a value and select the source unit.
- Choose the target unit and read the converted result.
Common use cases
- Convert metric and imperial units
- Check cooking or everyday measurements
- Compare area or length values
- Convert common values from product labels, recipes, and room measurements
What This Converter Covers
This converter focuses on everyday unit categories instead of every possible engineering unit. That keeps the interface fast and easy to scan.
| Category | Included examples | Useful for |
|---|---|---|
| Length | mm, cm, m, km, in, ft, yd, mi | Measurements and metric-US customary checks |
| Weight | g, kg, oz, lb | Packaging, shipping, and everyday comparisons |
| Area | cm², m², km², in², ft², yd², acre, hectare, ping | Room, land, and surface-area estimates |
| Volume | ml, L, m³, US tsp, tbsp, fl oz, cup, pint, quart, gallon | Cooking, liquids, and container sizes |
Common Everyday Conversion Examples
This tool is meant for quick everyday conversions, especially when labels, recipes, forms, or room measurements use different unit systems.
| Example | Useful when | Reminder |
|---|---|---|
| cm to inch | Checking product or clothing dimensions | Round only after you know the required precision. |
| kg to lb | Comparing body weight, shipping, or package labels | Use the same unit when comparing multiple items. |
| ft² to m² | Checking floor area, furniture, or property listings | Keep the same unit across every area being compared. |
| L to US gallon | Comparing container or fuel-volume labels | The tool labels US customary volume units explicitly. |
| ml to cup | Reading recipes | Choose US cup or metric cup to match the source recipe. |
Rounding and Precision Tips
For everyday use, a rounded result is usually easier to read. For forms, product dimensions, shipping labels, or technical requirements, keep more digits until you know the accepted tolerance.
| Situation | How to round | Reminder |
|---|---|---|
| Cooking | Round to practical kitchen measures | Cup, tablespoon, and teaspoon sizes may vary by region. |
| Shipping or package weight | Keep the precision required by the carrier | Small differences can affect price brackets. |
| Room or furniture dimensions | Round only after checking fit | Leave extra space for doors, walls, and installation. |
| Technical documents | Avoid rounding too early | Follow the precision requested by the standard or form. |
FAQ
Which unit categories are included?
Length, weight, area, and volume are included, with common metric and US customary units.
Can I swap units?
Yes. Use the swap units button to reverse the source and target units.
Is this for engineering precision?
Use it for everyday reference. For regulated or engineering work, confirm values with the required standard.
Are values uploaded?
No. Conversion runs in your browser.