How I convert fuel economy units without comparing the wrong direction

Fuel economy units can be confusing because km/L and MPG get better when the number is higher, while L/100 km gets better when the number is lower.

I use Fuel Economy Converter for the quick version of this task, then I review the output before relying on it.

The simple idea

Fuel economy units can be confusing because km/L and MPG get better when the number is higher, while L/100 km gets better when the number is lower.

The tool is a shortcut for the mechanical work. It does not remove the need to understand what the result means.

Step 1: Enter the known fuel economy value

Enter the known fuel economy value.

Step 2: Choose the source unit

Choose the source unit.

Step 3: Read the converted units

Read the converted units.

Step 4: Remember US MPG and UK MPG are different

Remember US MPG and UK MPG are different.

Step 5: Compare vehicles using the same unit

Compare vehicles using the same unit.

Step 6: For L/100 km, lower is better

For L/100 km, lower is better.

Step 7: Round results only after comparing

Round results only after comparing.

My checklist

Before I trust the result, I check:

• Enter the known fuel economy value.
• Choose the source unit.
• Read the converted units.
• Remember US MPG and UK MPG are different.
• Compare vehicles using the same unit.
• For L/100 km, lower is better.
• Round results only after comparing.

That review step is what keeps a quick tool from becoming a quick mistake.