How many kayaks fit on this roof rack?

Roof width is the whole game. Enter it, pick your kayak type, and choose flat or J-cradle stacking.

Enter your setup

Your roof

Usable roof/bar width

Bar to bar — the carrying width.

Kayaks

Kayak typeBeam width.

Carrying styleJ-cradles double the count.

Use positive measurements and valid numbers.

PADDLE · ROOF

Kayaks that fit

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Do you need paddle gear?

Kayak roof racksAmazon Recreational kayaksAmazon

Hand-picked for this exact result — no generic lists.

Beam width decides across; J-cradles decide the multiplier.

J-cradles double it.
Two cradles per kayak, boats on edge — the standard setup.
Strap the ends.
Bow and stern lines stop highway-speed lift.
Mind the 75 kg cap.
Two heavy tandems can exceed a roof system's rating.
Load from the side.
A bath mat on the car flank saves the paint.

One concrete case, with the assumptions spelled out.

1 across × 2 high = 2 kayaks — flat would only manage 1.

ƒ(x)kayaks = floor(roof width ÷ beam) × stack