Conversion Calculator

Use this free conversion calculator to convert common length, mass, volume, and temperature units including metric and U.S. customary units.

Use the Conversion Calculator

foot to meter3.6576 meter

12 foot

Category
length
From
foot
To
meter

Formula steps

  1. Convert the starting unit to the category base unit.
  2. Divide by the target unit factor to get the converted value.
  3. Round the displayed result for readability while keeping the formula direct.

Examples

Recent answers

Recent conversions will appear here.

Conversions use fixed unit factors in the browser and do not send values to a server.

Inputs and recent answers stay in this browser tab and are not sent to a server.

Illustration for Conversion Calculator showing convert length, mass, volume, and temperature units with clear formula steps.
Conversion Calculator artwork matches the live tool workflow: convert length, mass, volume, and temperature units with clear formula steps. Use it with the calculator, examples, and result notes.View in the smoke-kawaii gallery
Inputs explainedResult checksExample valuesRuns in your browser

How to use the Conversion Calculator

  1. Choose Length, Mass, Volume, or Temperature so the available units match the quantity you are converting.
  2. Enter Value, then select its starting unit in From and the desired unit in To.
  3. Press Convert value to read the converted amount and its unit. For example, 20 Celsius equals 68 Fahrenheit.
  4. Check the unit definitions before using the result. Volume conversions use US customary cups and gallons, and this tool does not convert volume to mass.

What people use it for

Convert between metric and U.S. customary length units.

Convert weight or mass between grams, kilograms, ounces, pounds, and tons.

Convert common cooking and liquid volume units.

Convert Celsius, Fahrenheit, and Kelvin temperatures.

Quick examples

Feet to meters

12 ft to m

3.6576 meters

Pounds to kilograms

150 lb to kg

68.0388555 kilograms

Fahrenheit to Celsius

72 F to C

22.2222222 C

Need the guide or a nearby tool?

Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.

Frequently asked questions

Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.

When should I use the Conversion Calculator?

Use it when your task matches one of these common needs: Convert between metric and U.S. customary length units. Convert weight or mass between grams, kilograms, ounces, pounds, and tons. It works best when you already know the value, source unit, target unit, format, or mode the page asks for.

What is the Conversion Calculator doing with my inputs?

In plain language: Most conversions multiply by a fixed factor to a base unit, then divide by the target factor. Temperature conversions use Celsius as the intermediate value. The examples on the page are there so you can compare your inputs with a filled-out example before copying the answer.

What do the main Conversion Calculator inputs mean?

The main inputs are the value you want to convert and the from/to units or formats. Keep the original value in the first field and choose the target unit carefully.

How should I read the Conversion Calculator answer?

Read the output next to your original input. If the tool changes format, units, encoding, spacing, or capitalization, compare a small sample before copying the whole result into another app.

What should I double-check before trusting the answer?

Use exact professional references for regulated, medical, lab, engineering, or legal measurement work that requires a specified standard. Also check the source unit, target unit, format, decimal places, and selected mode because small input changes can change the result.

Why are temperature conversions different from length or weight conversions?

Length, mass, and volume conversions usually use one multiply-or-divide factor. Temperature scales have offsets, so Fahrenheit, Celsius, and Kelvin need their own formulas instead of a simple factor.

Can I convert volume to weight with this calculator?

Not by unit labels alone. Volume and weight measure different things, so cups to grams, milliliters to ounces, or similar conversions need the ingredient density or product label before the answer is safe to use.

Does the site save what I enter?

No. The tool runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.