Honda Civic Si Trunk Space — 15 cu ft and What Fits

Quick answer

The Honda Civic Si has 15 cu ft of cargo space. In practice that is 2 checked suitcases, or 7 carry-ons, or about 12 supermarket bags. A folded pushchair fits.

What actually fits in a Civic Si

Cubic feet are an abstraction — 15 cu ft means nothing until you load it. Here is the same number in things people actually load, 2 checked cases or 7 carry-ons for the Honda Civic Si, with a packing allowance — a boot is not a cube, and corners go to waste.

FIG.01·Honda Civic Si — what fits in the boot
What you are loading	How many fit	Each item
Checked suitcases	2	27 × 21 × 14″ — 4.6 cu ft
Carry-on cases	7	22 × 14 × 9″ — 1.6 cu ft
Supermarket bags	12	about 1 cu ft each
Golf bags	2	full set, about 5 cu ft
Folded pushchair	Fits	about 6 cu ft

ROWS 5·SOURCE ForCar, computed from EPA cargo volume

Counts assume 80% usable volume: luggage does not tessellate, and a wheel arch eats the rest.

Cars with the same room

Closest matches by trunk volume — useful when the boot is the deciding factor and the badge is not. The Honda Civic Si sits at 15 cu ft, so these are the cars that carry the same load.

FIG.04·Honda Civic Si — cars with the same cargo room
Car	Trunk volume	vs Honda Civic Si	Checked suitcases	Measured
Maybach 57	15 cu ft	0 cu ft	2	2012
Maybach 62	15 cu ft	0 cu ft	2	2012
Maybach 62S	15 cu ft	0 cu ft	2	2012
Cadillac CT6	15 cu ft	0 cu ft	2	2020
Kia Forte	15 cu ft	0 cu ft	2	2024
Hyundai Genesis	15 cu ft	0 cu ft	2	2016

ROWS 6·SOURCE EPA interior volume + ForCar

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How we count

Cargo and passenger volumes come from EPA interior-volume records — the same figures manufacturers file for the window sticker, measured to a standard method rather than claimed in a brochure.

The luggage counts are ours — 2 checked cases for the Honda Civic Si come out of its 15 cu ft. We assume 80% usable volume, because a boot is not a cube: wheel arches, a sloping tailgate and the shape of the cases themselves waste the rest, which is why the Honda Civic Si counts as 12 cu ft of usable space rather than 15. Suitcase sizes are the airline standards — 22 × 14 × 9″ for carry-on, 27 × 21 × 14″ for checked, so the Honda Civic Si takes 7 of the small ones. Numbers are deliberately conservative; if we say four cases fit, four cases fit.

Everything on the Honda Civic Si

Recalls28 campaigns Reliability3.5/5 Common problems983 complaints Check a VINAgainst this exact build DimensionsSize, weight, generations Used prices695 listings What yours is worthValue by year & mileage Insurance costEstimated per year Window stickerOriginal Monroney label Decode a VINWhat each character means About this car1990–2026

Frequently asked questions

How much cargo space does the Honda Civic Si have?

15 cu ft behind the rear seats, plus 0 cu ft of passenger cabin.

How many suitcases fit in a Civic Si?

About 2 checked cases (27 × 21 × 14″) or 7 carry-ons, allowing for the fact that a boot is not a perfect cube.

Will a pushchair fit in a Civic Si?

Yes — a folded pushchair takes roughly 6 cu ft and this car has 15, so it fits with room for shopping.

Is that a lot for this size of car?

We don't have a comparable group for this model.

Cargo and passenger volumes from EPA interior-volume records, measured 2018 for the Honda Civic Si, seats up. Luggage capacity computed by ForCar at 80% usable volume against airline-standard case sizes. Last updated Sep 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.

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