KALLAX Shelf unit, white, 30 1/8x30 1/8″
+9⅝″ margin
All items that fit an Audi Q3 2019
Will fit in an ?
No, it won't fit.
It will not fit in this setup: BILLY Bookcase, white, 31 1/2x11x79 1/2″ is too large for an Audi Q3 2019 with seats up.
Fit Details
With seats up, This package will not fit in this setup. The blocker is cargo length, and you're short by 23½″ even with diagonal loading. We're about 95% confident in this estimate.
BILLY Bookcase, white, 31 1/2x11x79 1/2″
Box: 81¼″ × 11¾″ × 5″ · 88 lb 1 oz
Based on IKEA US (United States).
Package dimensions last checked and updated on Oct 21, 2026
Also on IKEA:United Kingdom
Package
Status
Limiting factor
Best orientation
Package #1
81¼″ × 11¾″ × 5″
Status:23½″ short
Limited by
Limiting factor:Cargo length
Best orientation:Diagonal
Vehicle limits
Opening width / height above sill
44⅛″ / 27⅛″
Cargo width / height
39⅜″ / 30¾″
Cargo length seats up / down
35⅜″ / 65⅜″
Loading sill height
29½″
Audi Q3 2019
Measurements last checked and updated on Oct 21, 2026
Helpful tips
Use these loading tips to improve your chances of fitting BILLY Bookcase, white, 31 1/2x11x79 1/2″ in Audi Q3 2019.
Use available cargo length
Use seats down if available to gain cargo length.
Load diagonally first
Load diagonally first, then straighten once inside.
Try fitting alternatives
Check the Similar items that fit section for safer alternatives.
Alternatives that fit in Audi Q3 2019
Ranked by fit margin and package-dimension similarity. This improves as we index more items.
About the Audi Q3 2019 boot
Fold the rear seats in the Q3 and the floor grows by 30″, from 35⅜″ to 65⅜″. Even with the seats up, some boxes longer than 35⅜″ fit at an angle, standing on their side. The tailgate opens 44⅛″ wide, but the floor is only 39⅜″ at its narrowest, so a box lying across the boot has to fit within that 39⅜″. Every box also has to pass under 27⅛″ of clear height above the loading sill. The floor is 3½″ lower than the sill, and from there the boot is 30¾″ tall. Empty the boot before you go: with the seats up, every inch of that 35⅜″ counts.
About the BILLY Bookcase, white, 31 1/2x11x79 1/2″ package
The white BILLY is packed in one long, narrow box: 81¼″ × 11¾″ × 5″. It weighs 88 lb 1 oz, and at that length you want a second person to carry it. Loaded end first, it asks little of the opening: only room for its 11¾″ by 5″ end. Lying flat and straight, it needs 81¼″ of floor for the longest side. On its side and at an angle, it needs less floor but more width at the opening, and the verdict on this page shows whether that works in your boot. Lift it level between the two of you and keep it that way until the whole box is in the boot.
Frequently asked questions
Find quick answers about fit for BILLY Bookcase, white, 31 1/2x11x79 1/2″ in Audi Q3 2019, including seats up vs seats down, limiting factor, best orientation, and package-by-package margins.
Will BILLY Bookcase, white, 31 1/2x11x79 1/2″ fit in Audi Q3 2019?
No. With seats up, it is short by 23½″ at Cargo length, even with diagonal loading.
What is the tightest part?
The limiting factor is Cargo length, with -23½″ margin in seats up.
Why does it not fit?
The blocker is Cargo length: with seats up, the box is 23½″ bigger than the space there.
Can I load it diagonally?
Yes, diagonal is the best orientation for this check, with -23½″ around the limiting point.
How tight is this fit?
This result is in the clear no-fit band (-23½″ at Cargo length).
Does it fit with seats up or seats down?
Seats up: No (-23½″). Seats down: No (-6⅞″). Default selection follows YES > MAYBE > NO.
What do YES, MAYBE and NO mean here?
YES means there is at least 2⅜″ to spare at the tightest point, in the best way the box can go in. MAYBE means it fits on paper, but with less than 2⅜″ to spare, so trim, the parcel shelf or the loading angle can decide it. NO means the box is bigger than the space at its tightest point, whichever way it goes in. Every margin on this page is that real gap: the car's measurement minus the box's.
What should I do instead?
Use the Helpful tips & alternatives section to choose a smaller item, different orientation, or split-load plan.
Which loading orientation works best?
Diagonal is the best orientation for this result in seats up.
How confident is this result?
Confidence is 95 out of 100 based on available dimensions and margin tightness.