{
  "schema_version": "compare-page.v2",
  "page_id": "booster-seats-that-fit-three-across-in-one-back-seat",
  "url": "https://robotrunk.com/compare/want/booster-seats-that-fit-three-across-in-one-back-seat",
  "title": "Booster seats that fit three across in one back seat",
  "question": "Which booster seats fit three across in a single back seat?",
  "answer": "Diono Connect3 RXT Backless Booster with Latch: Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space. A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.\nPEG / Peg Perego Primo Viaggio Flex 120: It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode. The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.\nBritax UpNGo Click: The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.\nBritax UpNGo: The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers. The maker does not guarantee that three of these seats will fit across every vehicle's back seat.\nBritax Highpoint 2-Stage Belt-Positioning Booster Car Seat: The retailer claims the seat fits three across, though no compatible vehicle list or installation measurements are supplied. Consumer Reports lists a 17-inch base, 21-inch overall width and 35-inch overall height, with no width adjustment.",
  "kind": "booster car seat",
  "market": "US",
  "generated_at": "2026-10-24T00:02:09.639Z",
  "columns": [
    "Width",
    "Three-across fit",
    "Weight"
  ],
  "notices": {
    "facts": "Every value in the table is a fact RoboTrunk checked, linked to the page it came from. A dash means no checked fact fills that cell.",
    "price": "Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live."
  },
  "cited_facts": [
    {
      "ref": "p1.f3",
      "product": "Diono Connect3 RXT Backless Booster with Latch",
      "field": "three-across fit",
      "value": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
      "stated_as": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
      "source_type": "review",
      "source_url": "https://redditrecs.com/travel-car-seat/model/diono-connect3-rxt-backless-booster-latch/",
      "source_read_at": "2026-10-18T22:20:30.223Z"
    },
    {
      "ref": "p1.f4",
      "product": "Diono Connect3 RXT Backless Booster with Latch",
      "field": "3-across width",
      "value": "Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space.",
      "stated_as": "Fits 3-Across – less than 17\" wide without sacrificing interior seat space.",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-18T19:37:33.814Z"
    },
    {
      "ref": "p1.f7",
      "product": "Diono Connect3 RXT Backless Booster with Latch",
      "field": "dimensions",
      "value": "The seat measures 9.1 inches high, 16.3 inches wide and 15.4 inches deep.",
      "stated_as": "Dimensions: 9.1\" H x 16.3\" W x 15.4\" D",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-18T19:37:33.814Z"
    },
    {
      "ref": "p1.f11",
      "product": "Diono Connect3 RXT Backless Booster with Latch",
      "field": "weight",
      "value": "The seat weighs 9.1 pounds.",
      "stated_as": "Seat Weight:    9.1 lb",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-18T19:37:33.814Z"
    },
    {
      "ref": "p3.f9",
      "product": "Britax UpNGo Click",
      "field": "seat width and 3-across",
      "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
      "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
      "source_type": "listing",
      "source_url": "https://strolleria.myshopify.com/products.json",
      "source_read_at": "2026-10-12T20:06:05.806Z"
    },
    {
      "ref": "p3.f10",
      "product": "Britax UpNGo Click",
      "field": "seat features (maker)",
      "value": "The maker lists rigid LATCH click-in, a 17.1-inch slim SpaceSaver design, the PosturePlus contoured seat, a carry weight under 5 lb, two dishwasher-safe cup holders, a washer-and-dryer-friendly cover, naturally flame-retardant fabrics with no added FR chemicals, colour-coded belt guides and a shoulder belt guide.",
      "stated_as": "Click On, Quick Off\nSteel rigid LATCH connectors click in with ease and release in seconds.",
      "source_type": "guide",
      "source_url": "https://us.britax.com/shop/car-seats/upngo-click-backless-belt-positioning-booster-seat",
      "source_read_at": "2026-10-13T01:39:17.640Z"
    },
    {
      "ref": "p6.f3",
      "product": "PEG / Peg Perego Primo Viaggio Flex 120",
      "field": "weight",
      "value": "The store page lists the car seat weight as 14.8 lbs, while an independent test measured about 15.7 lbs; the sources disagree on the weight.",
      "stated_as": "Car Seat Weight: 14.8 lbs",
      "source_type": "guide",
      "source_url": "https://strolleria.myshopify.com/products/peg-perego-primo-viaggio-flex-120-booster-seat",
      "source_read_at": "2026-10-15T13:06:47.503Z"
    },
    {
      "ref": "p6.f5",
      "product": "PEG / Peg Perego Primo Viaggio Flex 120",
      "field": "fit to vehicle",
      "value": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
      "stated_as": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
      "source_type": "blog",
      "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
      "source_read_at": "2026-10-15T13:08:45.665Z"
    },
    {
      "ref": "p6.f6",
      "product": "PEG / Peg Perego Primo Viaggio Flex 120",
      "field": "three-across fit",
      "value": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
      "stated_as": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
      "source_type": "blog",
      "source_url": "https://www.thecarmom.com/articles/peg-flex-120-review",
      "source_read_at": "2026-10-15T13:09:11.432Z"
    },
    {
      "ref": "p9.f1",
      "product": "Britax Highpoint 2-Stage Belt-Positioning Booster Car Seat",
      "field": "Three-across fit",
      "value": "The retailer claims the seat fits three across, though no compatible vehicle list or installation measurements are supplied.",
      "stated_as": "Fits three across to give you extra space when piling in for family trips or carpooling to soccer practice.",
      "source_type": "guide",
      "source_url": "https://anb-baby.myshopify.com/products/britax-highpoint-2-stage-belt-positioning-booster-car-seat",
      "source_read_at": "2026-09-24T12:04:22.568Z"
    },
    {
      "ref": "p9.f3",
      "product": "Britax Highpoint 2-Stage Belt-Positioning Booster Car Seat",
      "field": "Weight",
      "value": "Consumer Reports lists the seat at 12 lb in high-back form and 6 lb in backless form.",
      "stated_as": "Seat weight backless\n6 lbs.\nSeat weight highback\n12 lbs.",
      "source_type": "review",
      "source_url": "https://www.consumerreports.org/babies-kids/car-seats/britax-highpoint-2-stage/m402932/",
      "source_read_at": "2026-09-24T12:04:34.160Z"
    },
    {
      "ref": "p9.f8",
      "product": "Britax Highpoint 2-Stage Belt-Positioning Booster Car Seat",
      "field": "Dimensions",
      "value": "Consumer Reports lists a 17-inch base, 21-inch overall width and 35-inch overall height, with no width adjustment.",
      "stated_as": "Base width\n17 in.\nOverall width\n21 in.\nOverall height\n35 in.\nWidth adjustment\nNo",
      "source_type": "review",
      "source_url": "https://www.consumerreports.org/babies-kids/car-seats/britax-highpoint-2-stage/m402932/",
      "source_read_at": "2026-09-24T12:04:34.160Z"
    },
    {
      "ref": "p12.f1",
      "product": "Britax UpNGo",
      "field": "product weight",
      "value": "Sources disagree on seat weight: the store listings give 3.1 lb, while Consumer Reports gives 5 lb.",
      "stated_as": "Product weight: 3.1 lbs.",
      "source_type": "listing",
      "source_url": "https://strolleria.myshopify.com/products.json",
      "source_read_at": "2026-10-12T20:06:05.806Z"
    },
    {
      "ref": "p12.f2",
      "product": "Britax UpNGo",
      "field": "dimensions",
      "value": "Assembled dimensions are 15.5 inches long, 17.1 inches wide and 9 inches high.",
      "stated_as": "Product Dimensions: 15.5\" L × 17.1\" W × 9\" H",
      "source_type": "guide",
      "source_url": "https://strolleria.myshopify.com/products/britax-upngo-backless-booster-car-seat-raven-black",
      "source_read_at": "2026-10-13T01:06:58.930Z"
    },
    {
      "ref": "p12.f7",
      "product": "Britax UpNGo",
      "field": "three-across fit not guaranteed",
      "value": "The maker does not guarantee that three of these seats will fit across every vehicle's back seat.",
      "stated_as": "*Britax cannot guarantee 3-across fitment in all vehicles.",
      "source_type": "listing",
      "source_url": "https://strolleria.myshopify.com/products.json",
      "source_read_at": "2026-10-12T20:06:05.806Z"
    },
    {
      "ref": "p12.f9",
      "product": "Britax UpNGo",
      "field": "seat width and three-across fit",
      "value": "The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers.",
      "stated_as": "17.1” seat leaves plenty of room for siblings & carpoolers without compromising trusted Britax safety and premium comfort.",
      "source_type": "guide",
      "source_url": "https://us.britax.com/shop/car-seats/upngo-backless-belt-positioning-booster-seat",
      "source_read_at": "2026-10-13T01:07:00.569Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "megababiesusa-com",
        "display_name": "megababiesusa.com"
      },
      "product_id": "gid://shopify/Product/8673372274942",
      "name": "Diono Connect3 RXT Backless Booster with Latch",
      "url": "/products/ucp/megababiesusa-com/8673372274942",
      "why": "Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "The seat measures 9.1 inches high, 16.3 inches wide and 15.4 inches deep.",
            "stated_as": "Dimensions: 9.1\" H x 16.3\" W x 15.4\" D",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-18T19:37:33.814Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": {
            "field": "three-across fit",
            "value": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
            "stated_as": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
            "source_type": "review",
            "source_url": "https://redditrecs.com/travel-car-seat/model/diono-connect3-rxt-backless-booster-latch/",
            "source_read_at": "2026-10-18T22:20:30.223Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "weight",
            "value": "The seat weighs 9.1 pounds.",
            "stated_as": "Seat Weight:    9.1 lb",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-18T19:37:33.814Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "strolleria-com",
        "display_name": "strolleria.com"
      },
      "product_id": "gid://shopify/Product/3782284247114",
      "name": "PEG / Peg Perego Primo Viaggio Flex 120",
      "url": "/products/ucp/strolleria-com/3782284247114",
      "why": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "three-across fit",
            "value": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
            "stated_as": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
            "source_type": "blog",
            "source_url": "https://www.thecarmom.com/articles/peg-flex-120-review",
            "source_read_at": "2026-10-15T13:09:11.432Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": {
            "field": "fit to vehicle",
            "value": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
            "stated_as": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
            "source_type": "blog",
            "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
            "source_read_at": "2026-10-15T13:08:45.665Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "weight",
            "value": "The store page lists the car seat weight as 14.8 lbs, while an independent test measured about 15.7 lbs; the sources disagree on the weight.",
            "stated_as": "Car Seat Weight: 14.8 lbs",
            "source_type": "guide",
            "source_url": "https://strolleria.myshopify.com/products/peg-perego-primo-viaggio-flex-120-booster-seat",
            "source_read_at": "2026-10-15T13:06:47.503Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "strolleria-com",
        "display_name": "strolleria.com"
      },
      "product_id": "gid://shopify/Product/8008999993418",
      "name": "Britax UpNGo Click",
      "url": "/products/ucp/strolleria-com/8008999993418",
      "why": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "seat features (maker)",
            "value": "The maker lists rigid LATCH click-in, a 17.1-inch slim SpaceSaver design, the PosturePlus contoured seat, a carry weight under 5 lb, two dishwasher-safe cup holders, a washer-and-dryer-friendly cover, naturally flame-retardant fabrics with no added FR chemicals, colour-coded belt guides and a shoulder belt guide.",
            "stated_as": "Click On, Quick Off\nSteel rigid LATCH connectors click in with ease and release in seconds.",
            "source_type": "guide",
            "source_url": "https://us.britax.com/shop/car-seats/upngo-click-backless-belt-positioning-booster-seat",
            "source_read_at": "2026-10-13T01:39:17.640Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": {
            "field": "seat width and 3-across",
            "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
            "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "seat features (maker)",
            "value": "The maker lists rigid LATCH click-in, a 17.1-inch slim SpaceSaver design, the PosturePlus contoured seat, a carry weight under 5 lb, two dishwasher-safe cup holders, a washer-and-dryer-friendly cover, naturally flame-retardant fabrics with no added FR chemicals, colour-coded belt guides and a shoulder belt guide.",
            "stated_as": "Click On, Quick Off\nSteel rigid LATCH connectors click in with ease and release in seconds.",
            "source_type": "guide",
            "source_url": "https://us.britax.com/shop/car-seats/upngo-click-backless-belt-positioning-booster-seat",
            "source_read_at": "2026-10-13T01:39:17.640Z"
          }
        }
      ]
    },
    {
      "rank": 4,
      "merchant": {
        "slug": "strolleria-com",
        "display_name": "strolleria.com"
      },
      "product_id": "gid://shopify/Product/8085815623754",
      "name": "Britax UpNGo",
      "url": "/products/ucp/strolleria-com/8085815623754",
      "why": "The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "Assembled dimensions are 15.5 inches long, 17.1 inches wide and 9 inches high.",
            "stated_as": "Product Dimensions: 15.5\" L × 17.1\" W × 9\" H",
            "source_type": "guide",
            "source_url": "https://strolleria.myshopify.com/products/britax-upngo-backless-booster-car-seat-raven-black",
            "source_read_at": "2026-10-13T01:06:58.930Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": {
            "field": "three-across fit not guaranteed",
            "value": "The maker does not guarantee that three of these seats will fit across every vehicle's back seat.",
            "stated_as": "*Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "product weight",
            "value": "Sources disagree on seat weight: the store listings give 3.1 lb, while Consumer Reports gives 5 lb.",
            "stated_as": "Product weight: 3.1 lbs.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        }
      ]
    },
    {
      "rank": 5,
      "merchant": {
        "slug": "anbbaby-com",
        "display_name": "anbbaby.com"
      },
      "product_id": "gid://shopify/Product/6577953243222",
      "name": "Britax Highpoint 2-Stage Belt-Positioning Booster Car Seat",
      "url": "/products/ucp/anbbaby-com/6577953243222",
      "why": "The retailer claims the seat fits three across, though no compatible vehicle list or installation measurements are supplied.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "Dimensions",
            "value": "Consumer Reports lists a 17-inch base, 21-inch overall width and 35-inch overall height, with no width adjustment.",
            "stated_as": "Base width\n17 in.\nOverall width\n21 in.\nOverall height\n35 in.\nWidth adjustment\nNo",
            "source_type": "review",
            "source_url": "https://www.consumerreports.org/babies-kids/car-seats/britax-highpoint-2-stage/m402932/",
            "source_read_at": "2026-09-24T12:04:34.160Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": {
            "field": "Three-across fit",
            "value": "The retailer claims the seat fits three across, though no compatible vehicle list or installation measurements are supplied.",
            "stated_as": "Fits three across to give you extra space when piling in for family trips or carpooling to soccer practice.",
            "source_type": "guide",
            "source_url": "https://anb-baby.myshopify.com/products/britax-highpoint-2-stage-belt-positioning-booster-car-seat",
            "source_read_at": "2026-09-24T12:04:22.568Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "Weight",
            "value": "Consumer Reports lists the seat at 12 lb in high-back form and 6 lb in backless form.",
            "stated_as": "Seat weight backless\n6 lbs.\nSeat weight highback\n12 lbs.",
            "source_type": "review",
            "source_url": "https://www.consumerreports.org/babies-kids/car-seats/britax-highpoint-2-stage/m402932/",
            "source_read_at": "2026-09-24T12:04:34.160Z"
          }
        }
      ]
    }
  ]
}