Universal Unit Converter

Universal Unit Converter is a free online tool that convert metric, imperial, and US units for length, weight, volume, temperature, time, and data instantly in your browser.

Select Category

From

Embed Unit Converter on your site.

640px iframe

Let visitors use this tool directly on your page with a simple iframe embed. Copy the snippet, paste it into your site, and keep the workflow inside your content.

Preview embed

Works in HTML, CMS blocks, and most site builders.

What is Unit Converter | Rune

A Unit Converter turns one measurement into another using standard factors or formulas. Rune covers the most common metric, imperial, and US conversions for length, weight, volume, temperature, time, and digital storage, including meters to feet, centimeters to inches, kilograms to pounds, liters to gallons, Celsius to Fahrenheit, hours to seconds, and KB to GB.

Search intent around unit converter, metric converter, measurement converter, meters to feet, kg to lbs, liters to gallons, and Celsius to Fahrenheit is practical and immediate. People need an answer for school, recipes, product dimensions, travel, fitness, engineering notes, storage sizes, and everyday comparisons between metric and imperial systems.

Temperature conversion is handled with formulas because Celsius, Fahrenheit, and Kelvin use different zero points. Most other categories use multiplication factors against a base unit. Digital storage includes decimal units such as KB, MB, and GB plus binary units such as KiB, MiB, and GiB so storage and operating-system differences are easier to check.

The tool runs in the browser, updates results as values or units change, supports quick unit swapping, and lets you copy the result. It is built for everyday and educational conversions. For certified metrology, regulated engineering documentation, calibration, or legal measurement requirements, verify factors against the applicable official standard.

Free

For Everyone

The Advantage of Using Unit Converter on Rune

Unit Converter brings together 6 capabilities, including comprehensive categories, instant & accurate, and easy swap function, in a single browser-based workspace. Unit Converter handles routine input directly in your browser when the workflow does not need sharing, sync, remote lookup, or external conversion. Open the page, finish the task, and copy or download the result without installing software.

Rune built Unit Converter for anyone who values getting things done over navigating menus and settings. Get real-time conversion results as you type, using standard factors and temperature formulas. It is the kind of tool you bookmark once and reach for whenever the need comes up.

Key Features of Unit Converter

Comprehensive Categories, Instant & Accurate, and 4 more reasons to use Unit Converter

Comprehensive Categories

Convert length, weight, volume, temperature, time, and data storage from one focused interface.

Instant & Accurate

Get real-time conversion results as you type, using standard factors and temperature formulas.

Easy Swap Function

Quickly reverse your conversion with one click using the intuitive swap button.

One-Click Copy

Copy results to clipboard instantly for easy pasting into documents or applications.

Mobile Optimized

Fully responsive design works flawlessly on smartphones, tablets, and desktops.

100% Private

All calculations happen in your browser. No data is sent to servers or stored anywhere.

Key Advantages of Unit Converter

Browser-based processing

Unit Converter handles local input in your browser, so routine work stays on your device without extra setup.

Comprehensive Categories

Convert length, weight, volume, temperature, time, and data storage from one focused interface. This feature is available for free with no usage limits on the standard tier.

Browser-based processing

Unit Converter handles local input in your browser, so routine work stays on your device without extra setup.

Mobile and desktop ready

Unit Converter works on any screen size. The interface adapts to phones, tablets, and desktops so you can use it wherever you are.

No account needed for core use

Use the core Unit Converter workflow without creating an account or providing an email address.

Free with no hidden costs

Unit Converter is completely free on the standard tier. There are no trial periods, no watermarks on output, and no surprise paywalls after you start using it.

Who Benefits from Unit Converter

Unit Converter fits into a wide range of workflows. Here is how different users put it to work.

Students and Academics: Use Unit Converter for assignments, research papers, and coursework. Convert length, weight, volume, temperature, time, and data storage from one focused interface.
Professionals and Teams: Integrate Unit Converter into your daily workflow for faster turnaround on routine tasks. Get real-time conversion results as you type, using standard factors and temperature formulas.
Content Creators and Freelancers: Speed up your creative process with Unit Converter. Quickly reverse your conversion with one click using the intuitive swap button.
Developers and Technical Users: Add Unit Converter to your toolkit for quick utility tasks between coding sessions. Copy results to clipboard instantly for easy pasting into documents or applications.

How to Use Unit Converter

Getting started with Unit Converter takes under a minute

Select Category

Choose the measurement category you want to convert (Length, Weight, Volume, Temperature, Time, or Data).

Enter Value

Type the numerical value you want to convert in the "From" input field.

Choose Units & Copy

Select your source and target units from the dropdowns, see the result instantly, and use the copy button or swap to reverse conversion.

Pro Tips

1 meter = 3.28084 feet, 1 kilometer = 0.621371 miles for quick length estimates.
1 kilogram = 2.20462 pounds, 1 ounce = 28.3495 grams for weight conversions.
1 US gallon = 3.78541 liters, 1 cup = 236.588 milliliters for cooking.
Use the swap button to quickly reverse any conversion without re-entering values.
Temperature uses formulas, not simple ratios: °F = °C × 9/5 + 32.
KB, MB, and GB are decimal units; KiB, MiB, and GiB use powers of 1024.

Explore More Tools

Discover other powerful tools to boost your productivity

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin

Open Tool

Currency Converter

Convert currencies with real-time exchange rates

Open Tool

Date Calculator

Calculate the difference between any two dates

Open Tool

Time Zone Converter

Convert times between different time zones

Open Tool

Frequently Asked Questions

Have questions? Here are the answers about Unit Converter

Why is temperature conversion different from other units?

Temperature conversion uses formulas with offsets, such as Celsius to Fahrenheit, while most length, weight, and volume conversions use simple multiplication ratios.

What is a unit converter?

A unit converter applies conversion factors or formulas to transform a measurement from one unit to another, such as meters to feet or kilograms to pounds.

How do I convert meters to feet?

Select the "Length" category, enter your value, choose "Meter (m)" as your source unit and "Feet (ft)" as your target unit. 1 meter equals 3.28084 feet.

How do I convert kilograms to pounds?

Select the "Weight" category, enter your kilogram value, choose "Kilogram (kg)" as from-unit and "Pound (lb)" as to-unit. 1 kilogram = 2.20462 pounds.

What measurement categories are supported?

Rune supports 6 categories: Length, Weight, Volume, Temperature, Time, and Data Storage. Each includes common metric, imperial, US, decimal, or binary units.

Can I convert metric to imperial units?

Yes. The converter includes common metric-to-imperial pairs such as meters to feet, centimeters to inches, kilograms to pounds, liters to gallons, and kilometers to miles.

What is the difference between KB and KiB?

KB is decimal and equals 1000 bytes. KiB is binary and equals 1024 bytes. The same pattern applies to MB/MiB and GB/GiB.

Is my data safe and private?

Unit conversions run in your browser. No conversion values are uploaded to Rune for calculation.

Do I need to create an account?

No account is needed for basic conversions. Open the page, choose a category, and enter the value you want to convert.

Still need help?

Can't find what you're looking for? Our support team is here to assist you.

Contact Support

Tool Rating

Help other users by sharing your experience.

4.8 (669 ratings)

Rate this tool:

Optional feedback

Universal Unit Converter