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A car seat weighs 15 pounds. By NHTSA's formula, what is the heaviest child for lower-anchor installation?

50 pounds.

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  1. 65 pounds
  2. 80 pounds
  3. 50 pounds ✔

Why: NHTSA's lower anchor weight limit is 65 pounds minus the weight of the car seat. A 15 pound seat leaves 50 pounds for the child.

Huh, didn't know that: The limit counts the seat's own weight, so a heavier seat means a lower child weight limit.

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References

Answer: 50 pounds. NHTSA's lower anchor weight limit is 65 pounds minus the weight of the car seat. A 15 pound seat leaves 50 pounds for the child.

  1. NHTSA: Car Seats and Booster Seats www.nhtsa.gov/vehicle-safety/car-seats-and-booster-seats
    Lower anchor weight limit = 65 lbs
    Checked 2026-10-10.

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