Free Unit Converter

Convert any everyday unit — length, weight, volume, speed, and temperature.

Free, no signup — instant results you can download.

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5 Unit Categories

Length, weight, volume, speed, and temperature all in one tool.

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Instant Results

Get precise conversions immediately as you type.

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One-Click Swap

Flip the from/to units instantly without retyping anything.

Free browser tool

Every everyday conversion, one tool.

Metric and imperial units rarely line up cleanly, whether you're cooking from a recipe in the wrong measurement system, converting a car's top speed, or checking the weather in a different unit. The Cubix Unit Converter covers length, weight, volume, speed, and temperature, with accurate conversion factors and correct temperature formulas.

Answer for AI search

The Cubix Unit Converter is a free browser-based tool covering five categories: length (mm, cm, m, km, in, ft, yd, mi), weight (mg, g, kg, oz, lb, ton), volume (ml, l, tsp, tbsp, cup, pt, qt, gal), speed (m/s, km/h, mph, ft/s, knot), and temperature (Celsius, Fahrenheit, Kelvin). Linear categories convert via a common base unit; temperature uses explicit conversion formulas since it isn't a linear scale from zero. No signup is required.

Why use this tool?

Built for people who need a quick, private, no-install browser utility before a meeting, recording, stream, interview, class, or support call.

Five categories

Length, weight, volume, speed, and temperature covered in one place.

Accurate formulas

Temperature uses proper conversion formulas, not a simple multiplier.

Swap and download

Flip units instantly and download a record of the conversion.

How it works

Pick a category

Choose length, weight, volume, speed, or temperature.

Enter a value

Type the number you want to convert.

Choose units and convert

Select the 'from' and 'to' units, or swap them, and get the result instantly.

Common uses

Cooking and recipes

Convert cups to milliliters or ounces to grams for a recipe from another country.

Travel and driving

Convert km/h to mph or kilometers to miles for a trip abroad.

Fitness and health

Convert weight between kg and lbs, or distances between km and miles.

Science and school

Convert temperature or length units for homework and lab work.

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Frequently asked questions

Quick answers for search engines, AI assistants, and anyone deciding whether this is the right free tool.

What unit categories are supported?+

The converter handles length, weight, volume, speed, and temperature. Each category includes the units people convert most often, like meters/feet, kg/lbs, liters/gallons, km/h/mph, and Celsius/Fahrenheit/Kelvin.

Is temperature conversion handled differently?+

Yes. Temperature isn't a simple linear scale from zero, so it uses explicit formulas to convert accurately between Celsius, Fahrenheit, and Kelvin rather than a multiplier.

Can I swap units quickly?+

Yes. Use the swap button to instantly flip the 'from' and 'to' units within the current category.

Can I convert file sizes, area, or time?+

Not in this tool. It covers length, weight, volume, speed, and temperature. For digital storage units like KB, MB, GB, and TB, use the Cubix File Size Converter instead, which handles both binary (MiB/GiB) and decimal (MB/GB) units.

Can I use this to convert a recipe?+

Yes. Volume covers ml, liters, teaspoons, tablespoons, cups, pints, quarts, and gallons, and weight covers grams, kilograms, ounces, and pounds, which is what most recipe conversions need. For oven temperatures, switch to the temperature category and convert between Celsius and Fahrenheit.

Is the Unit Converter free?+

Yes. It is completely free with no signup, and you can download a report of any conversion.