Welcome to Fifteen1413 & LabbaArt's Giantess Calculator! Have you ever wondered how small the world would appear to eyes of your giantess OC? Or, conversely, how big she'd really be if you were to meet her? Well, thanks to our calculator, you'll finally have all the answers you've always been looking for!

Enter your inputs—normal size data

Here you may enter any known data about your girl: in this side of the page, you must think of her as being normal-sized. The more you fill, the better!

Only integer values greater than zero are allowed, except for the hips to waist ratio field below that allows decimal values between 0.55 and 0.85.

Girl's data  
Normal-size height (cm)
Normal-size weight (kg)
Hair length (cm)
Eyelash length (mm)
Fingernail length (mm)
Hips to waist ratio
Bust size

Enter your inputs—giantess size data

Now it's time for giantesses to become part of the equation! Using the following forms, you can tell us her height as a giantess. Inputs are cumulative, the system will add all things in all boxes together.

If you don't know her precise height, don't worry: you can just tell us how much bigger than her normal-sized height she is (e.g. 50 times) using the following form! Of course, do not fill both forms at the same time or else you might get an error: just use the most appropriate one given the data you have on your own character!

How tall is your giantess?  
Observable universe diameters
Scaling factor  
Scaling factor (pure number)

What to show—select the outputs

This calculator has a lot of functionality, but not every user will want to know every thing. It can become quite long with all things showing—which is great if you want to know exactly how wide a single strand of her hair is, but that's not needed for most people. Please select what information outputs you would like to see.

Show all outputs 
  • Physical outputs (show/hide)
  • Movement and Energy (show/hide)
  • Accessories (show/hide)
  • Kemonomimi (show/hide)


Are any of these forms optional?

The forms in the 'Normal size data' section are optional; if any of them are left blank, we'll automatically fill them up with pre-set values. The forms in the 'Giantess size data' are compulsory (but the user can decide whether to input the girl's height as a giantess or the scaling factor).

What units does this calculator use?

This calculator is programmed to use a mix of SI units and custom units. Click here to learn more about about the metric system of units!

How big is the diameter of the observable universe?

It's 93 billion light-years.