Pet door opening comparison calculator

Calculate required clear width and required clear height with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use required clear width and required clear height to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Measured pet width (cm)
20
Measured pet height (cm)
30
User extra clearance each side (cm)
2
Opening options JSON [ID,clear width cm,clear height cm]
[["small",23,33],["large",30,40]]
Required clear width (cm)
24
Required clear height (cm)
34
Option fit and margins [ID,fits,width margin cm,height margin cm]
[["small","Does not fit",-1,-1],["large","Fits",6,6]]

Try another scenario

Measured pet width (cm)
20
Measured pet height (cm)
30
User extra clearance each side (cm)
1
Opening options JSON [ID,clear width cm,clear height cm]
[["small",23,33],["large",30,40]]
Required clear width (cm)
22
Required clear height (cm)
32
Option fit and margins [ID,fits,width margin cm,height margin cm]
[["small","Fits",1,1],["large","Fits",8,8]]
Calculation method

Calculation method

Required clear width (cm)

petWidth+2*suppliedClearance.

Required clear height (cm)

petHeight+2*suppliedClearance.

Option fit and margins [ID,fits,width margin cm,height margin cm]

Compare each clear opening against required width and height; output Fits or Does not fit.

Symbols and units
a
Measured pet width (cm)
b
Measured pet height (cm)
c
User extra clearance each side (cm)
d
Opening options JSON [ID,clear width cm,clear height cm]

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Static rectangular measurement comparison only. Clearance entirely user supplied; no animal-suitability, mobility, training or safety assurance. Supported limits: Positive body/opening dimensions; clearance>=0; unique IDs; <=100 options.
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