Thinking between metric, imperial, and traditional Thai/Japanese units is not so easy for a math wimp like me, so I rely on unit converters to do heavy (and sometimes quite light) lifting:
For a dedicated Windoze app I use Converber. There are many like it, but this one even has some Thai measurements in it.
A good online unit conversion utility can be found here: Online converter
Raising a family in Thailand // Documenting Issan food, culture, music, and people
