KidShortlist
Graco · High-back booster

Graco SlimFit 3-in-1

Based on 2 independent scored tests: BabyGearLab (2024), Insurance Institute for Highway Safety (IIHS) (2016). The test scores average 81. With only 2 tests, the ranking score is pulled down a little until more testers confirm it.

Tested for US & Canada
74
Shortlist score
Good
#59 of car seats for US & Canada
Medium confidence

Where to buy

This seat is certified for US & Canada. Car seats may only be used in the market they're approved for, so we don't link to shops in Czechia.

Test results

Each score as the tester published it, converted to our 0–100 scale. Weight is how much the result counts towards the score.

BabyGearLab US · Editorial review
BabyGearLab best convertible car seat review, 2024
75%
Best on a Tighter Budget
Our scale75
weight 0.60
Crash test
8.4
Ease of installation latch
7.9
Ease of installation belt
6.5
Ease of use
6.4
Comfort quality
7.0
Weight size
7.2
Listed at $240 metric weights: Crash Test (35%); Ease of Installation - LATCH (20%); Ease of Installation - Belt (15%); Ease of Use (15%); Comfort/Quality (10%); Weight/ Size (5%); overall listed on https://www.babygearlab.com/topics/vehicle-safety/best-convertible-car-seat/ratings; review last modified 2024-01-05
View on babygearlab.com ↗
Babylist US · Editorial review
Babylist: The Best All-in-One Car Seats, 2026
Honorable Mention
Pick or pass/fail. Shown, not scored.
product name as listed: Graco SlimFit 3-in-1 Car Seat; guide updated 2026-03-13
View on babylist.com ↗
1 older or duplicate result not counted
Insurance Institute for Highway Safety (IIHS) US · Lab test
IIHS booster belt-fit ratings (final ratings list, program 2008-2024) · highback
BEST BET
Best Bet
Our scale90
not counted

Not counted: Superseded by a newer test from the same source.

Tested model #1980623; results also apply to 1999656, 2001876, 2104093, 2121214, 2136871; seat type: Highback only; rating year not shown on the IIHS ratings list; rating covers booster-mode belt fit only (IIHS does not rate harness modes)
View on iihs.org ↗

Also recommended: Babylist: Honorable Mention.

Top-ranked alternatives

How we turn these into one number: methodology. Tested 2016–2026.

KidShortlist

We don't test products ourselves. Every score here comes from an independent tester and links back to it. We combine 4,061 results from 26 sources.

Read before buying

Several testers are paywalled, so we only include what they publish openly. Models change and get recalled. Check the tester's own page and the retailer listing before you buy.

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