Unit Converter

Need to switch between metric and imperial? Converting pounds to kilograms for a recipe, feet to meters for a project, or Celsius to Fahrenheit for travel? FreeFileConvert now offers an online unit converter alongside our file conversion tools.

Convert units in seconds

Open the unit converter, pick a category, enter a value, and the result updates instantly. Swap units with one click, or browse popular conversions like centimetres to inches, pounds to kilograms, and feet to meters.

Each conversion page includes:

Clear formulas using standard unit symbols (m, ft, kg, °C, and more)
Worked examples so the math is easy to follow
Reference tables for quick lookups from 1 to 20 (or a sensible range for temperature)

10 categories, one place

The converter covers everyday and technical needs:

Category	Examples
Length	mm, cm, m, in, ft, miles
Weight / mass	g, kg, oz, lb
Temperature	°C, °F, K
Energy	J, cal, kWh
Area	m², ft², acres, hectares
Frequency	Hz, kHz, MHz, rpm
Power	W, kW, hp
Electric current	A, mA, µA
Charge	C, mAh, Ah
Voltage	V, mV, kV

Whether you’re cooking, studying, travelling, or working on a technical project, the right units are a few clicks away.

Helpful pages, not just a calculator

Every conversion pair gets its own page (for example, feet to meters or lbs to kilograms). Each page explains what the units mean, how the conversion works, and includes a table of common values. Handy if you’re learning the relationship between systems or need a quick reference without opening a spreadsheet.

Part of the FreeFileConvert toolkit

The unit converter sits next to our time zone converter and file tools (PDF, video, image, and more). Same site, same simplicity: open the page, get the answer.

Get started: visit freefileconvert.com and choose Unit Converter from the Tools menu.

Convert to CDR: What Works Best and Why

Converting to CDR is most valuable when your final work happens in CorelDRAW. If your team receives files from multiple sources, CDR gives you one consistent format for editing, proofing, and production handoff. That helps reduce last-minute compatibility issues in print and design workflows.

FreeFileConvert makes this process simple: upload a source file, choose CDR, convert, and download. The goal is to keep the result practical for real-world use, especially when files come from mixed tools and not all source formats are equally conversion-friendly.

Best Input Types for CDR

If you can choose your source format, start with vector files first.

Best: SVG, AI, EPS
Good: vector PDF
Fallback: JPG/JPEG, PNG, TIFF, BMP, GIF, WEBP
Project-based: PSD

Vector inputs usually keep the structure cleaner and are easier to edit after conversion. Raster inputs (photos/images) can still be converted, but they behave differently.

Raster Inputs: Size Handling and Why It Matters

For raster-to-CDR workflows (like JPG/PNG to CDR), very large images can create heavy intermediate data and slow down or fail downstream conversion steps. To improve reliability, FreeFileConvert applies a practical size cap before vectorization: if a raster image is too large, it is scaled down to a maximum working dimension (while preserving aspect ratio and avoiding upscaling small images).

This has a few benefits:

Reduces oversized intermediate files
Improves conversion stability on large photo inputs
Speeds up processing in many cases
Keeps normal-sized images unchanged

In short, for raster files, controlled resizing is a quality-vs-reliability optimization. It helps avoid extreme input sizes that are more likely to fail, while preserving a useful output for CorelDRAW editing and production.

Final Takeaway

Use vector sources whenever possible for the cleanest CDR results. When raster sources are the only option, FreeFileConvert’s size-handling approach helps keep conversions stable and practical by avoiding excessive image dimensions before conversion.

MP4 to AMV Conversion Is Now Supported on FreeFileConvert

MP4 to AMV Is Now Available

FreeFileConvert now supports MP4 → AMV conversion.

AMV is an older, lightweight video format that’s still used by certain legacy portable media players and budget devices. If you’ve ever tried to load a normal MP4 onto one of these players, you’ve probably run into the same problem: the file plays perfectly on modern devices, but the older player refuses to open it or plays it incorrectly. Adding MP4 to AMV support is meant to solve that exact compatibility gap.

With this update, you can upload an MP4 and download an AMV file that is formatted in a way these devices are much more likely to accept, without needing to experiment with settings.

Why AMV Compatibility Matters

AMV is more strict than many modern formats. Even when a tool claims to “support AMV,” the resulting file may still fail on real hardware if it doesn’t match what AMV players expect. Reliability depends on producing an output that fits the practical constraints of AMV playback, not just creating a file with an .amv extension.

This release improves how AMV outputs are produced so conversions are more consistent across different input files, including MP4s created by various apps and devices.

How to Convert MP4 to AMV

To convert an MP4 file to AMV on FreeFileConvert, upload your MP4, select AMV as the output format, and start the conversion. When it finishes, download the .amv file and transfer it to your device as you normally would.

If you’re converting specifically for a legacy player, it’s still a good idea to test playback on the target device, but this update is designed to make successful conversions much more common on the first try.

Conversion reliability fix and PDF to Word improvement

Recently, conversions may have appeared stuck on “Processing” or been marked as “Failed” shortly after starting, even when the file was fine. This was caused by an update we rolled out: our conversion workers got out of sync, so some jobs were left in an inconsistent state. We’ve fixed how we manage those workers during updates so only the current system handles conversions, and they should behave normally again.

PDF to DOCX conversions have also been improved and should now have a higher success rate.