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.