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.
Blog.FreeFileConvert.com 