Unit Converter

Convert length, weight and temperature units.

Enter your details and select Calculate.

This tool provides an estimate. Verify results before making financial, educational or medical decisions.

Converting units accurately

This guide explains how to use the calculator, includes an example, discusses limitations and answers common questions.

Unit conversions express the same physical quantity using a different measurement scale. Some units use multiplication while temperature conversions require an offset.

How to use this calculator

Choose the category, source unit and destination unit. Enter the amount and read the result. Keep units attached to every number.

Worked example

1 kilometre = 1,000 metres; 1 kilogram ≈ 2.20462 pounds; 0°C = 32°F.

When this calculator is useful

Useful for recipes, travel, science, measurements and comparing international product specifications.

When not to rely on it

Rounding can matter in engineering and medication. Similar names may refer to different units, such as US and imperial gallons.

Practical tip

Use sufficient precision for your task and double-check unit labels before copying a result.

Frequently asked questions

Can I convert metres directly to kilograms?

No. Length and mass are different physical quantities.

Why is temperature different?

Celsius and Fahrenheit use both a scale factor and an offset.

How many decimal places should I use?

Use the precision appropriate to the measurement and its purpose.

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Educational information only. Results are estimates unless otherwise stated. Verify important financial, medical or legal decisions with a qualified professional.