The calculator will convert any measuring unit for you in seconds.

1. Please select an option from the drop down list, i.e. length
   
2. Then select a conversion option from dropdown list, i.e. inches to millimetres
3. Enter your value, how many inches you want to convert to millimetres, i.e. 100
4. Click on convert, the figure in millimetres will appear below i.e. the result is 2540

5.