# Scale question

#### reddwarf

##### Well-Known Member
Odd question, what scale in 1/400 starship would people and trees etc be in mm.

#### Revell-Fan

Moderator
That depends on the size of the man / woman / tree. An average human of about 175 cm would be 1750 mm / 400 = 4.375 mm tall.

#### SCEtoAux

##### Member
A 20 meter tall tree would be 5 cm at 1/400 scale.
Figure 2.5 cm for every 10 meters in height.

#### micahrogers

##### Mediocre Modeler in many forms
One reason I like Metric.... it scales readily.... except 1/48th scale.... which used to be known as "Quarter Inch Scale"... because 1 foot at 1/48th equals 1/4 inch.

#### zathros

##### -----SENIOR----
Moderator
What I don't like about metric is when you actually have to build something. Between number, Letter, and Fractional drills, the increments are in .0001"s 10th's of a thousandths of a inch. There are so many more thread sizes, you will never find machine size threads in metric, as in hi-tech sewing machines, which is why American SAE will never gone. Metric has been absorbed and any machinist or mechanic worth his salt has tooling for both, but what you can do in SAE you cannot do in Metric. It is easier though, and for certain applications, it may be better, such as space travel, and similarly related measurements.

Yes, metric scales up easier, when making these models though, biological objects will never be the same size, so both systems go out the window. You have to design on a "mean", and decide how much you will vary from it.

#### Tonino

##### Well-Known Member
Some time ago, I published a little tool that can be useful for any scale comparison issue...
It's still available in the resource section and it's universal (it can be used with any measure unit system...)
I know it's only a matter of doing some maths... but I hate calculations.... so I realized this one just to indulge to my laziness....