Unit Converter | Length, Weight, Temperature & More

Convert between 12 unit categories including length, weight, temperature, volume, and speed

Handles inches to cm, lbs to kg, Fahrenheit to Celsius, miles...

When Should You Use This Calculator?

Running fast single conversions in Simple mode
Using high-intent Popular Pairs for repeat conversions (lbs↔kg, in↔cm, etc.)
Parsing one-line text input like "12 in to cm" in Advanced mode
Tracking conversion calculations across sessions with recent pair shortcuts
Switching measurement systems without re-entering values

Key Features:

Three modes: Simple, Popular Pairs, and Advanced
One-click high-intent conversion pairs with category presets
Advanced quick parser for one-line conversion input
Recent conversion pairs and fast swap workflow

Frequently Asked Questions

How do I convert inches to centimeters?

Multiply inches by 2.54. For example, 12 inches = 30.48 cm. You can also select Length in this converter, enter your value in inches, and select cm as the output unit for instant results.

How do I convert pounds to kilograms?

Multiply pounds by 0.453592. For example, 150 lbs = 68.04 kg. Use the Weight category and select lbs to kg for an instant conversion.

Are the conversions exact?

We use high-precision conversion factors. Results are typically accurate to 10+ decimal places, which is sufficient for almost all scientific and engineering needs.

What unit categories are supported?

The converter supports 12 categories: length, weight, temperature, volume, speed, area, pressure, energy, power, frequency, angle, and data size. Use Popular Pairs mode for the most common conversions, or Simple mode for direct category selection.

Can I export my Unit Converter calculations?

Yes! In guest mode, you can export your calculations to JSON format. Sign in is required for PDF and CSV export. Click the export button to download your results. This is perfect for record-keeping, sharing with others, or importing into other tools.

Does this calculator save my history?

Yes! Your calculation history is automatically saved. Guest users can save up to 50 calculations per workspace locally. Sign in for free to save up to 100 calculations per workspace, with access from any device when logged in.

Is this calculator free to use?

Absolutely! The Unit Converter is completely free with no sign-up required. Create a free account to unlock additional features like more calculation history, multiple workspaces, and the ability to access your saved data from any device.

Related Calculators:

Time Zone Converter- Convert times between any two cities or time zones instantly
Date Difference- Calculate the exact number of days, weeks, months, or years between any two dates
Percentage Calculator- Calculate percentages: what is X% of Y, percent change between two numbers, percent off discounts, reverse percentage, and more

About CalcTrail

CalcTrail is a comprehensive free online calculator platform offering a comprehensive collection of specialized calculators for finance, health, academics, engineering, AI tools, and more. All calculators are free to use with no sign-up required. Create an account to save your work, access unlimited calculation history, workspace management, and custom variables.

This calculator is part of CalcTrail's collection of professional-grade tools designed for students, professionals, and anyone who needs accurate calculations. Export your results to PDF, JSON, or CSV formats. All calculations are performed client-side for privacy and speed.

Browse all calculators on CalcTrail to discover more tools for your needs.