How Heavy Is a Semi-Truck at Maximum Gross Weight?
a Semi-Truck at Maximum Gross Weight weighs exactly
40 US tons (36,290 kg)
- a blue whale150,000 kg
adult; females larger than males; Antarctic subspecies up to 330,000 lb (149,685 kg), North Atlantic/North Pacific over 100,000 lb (45,359 kg)
- a semi-truck at maximum gross weight36,300 kg
tractor-semitrailer combination at the federal maximum gross vehicle weight on Interstate highways (23 CFR 658.17)
- an African elephant4,500 kg
adult male 4,500–6,100 kg; adult female 2,000–3,500 kg
- an average new car1,980 kg
model year 2024 US fleet average curb weight
- You
Open full comparison → to add more objects on one scale.
Put it in perspective
- About 4.1× a blue whale
- About 8.1× an African elephant
- About 18× an average new car
Why weights differ
80,000 lb (36,287.39 kg) is the federal ceiling for a tractor-semitrailer on the Interstate System; the lower bridge-formula limit can control for particular axle spacings, and states may set lower limits for other roads.
Sources
[1] Office of the Federal Register / National Archives and Records Administration (eCFR)
23 CFR § 658.17 WeightGovernment agency
“( b ) The maximum gross vehicle weight shall be 80,000 pounds except where lower gross vehicle weight is dictated by the bridge formula.”
Value as published: 80,000 pounds · accessed 2026-11-11.
Last updated 2026-11-11.Report a correction (please include a source link).
Related objects
- a 40 ft shipping container32.5 t (35.8 US tons)
- a 20 ft shipping container30.5 t (33.6 US tons)
- a Space Shuttle orbiter68.6 t (75.7 US tons)
- a school bus14.97 t (16.5 US tons)
- the International Space Station420 t (463 US tons)
- an average new car4,350 lb (1,980 kg)
Frequently asked questions
How much does a semi-truck at maximum gross weight weigh?
a Semi-Truck at Maximum Gross Weight weighs exactly 40 US tons (36,290 kg) — tractor-semitrailer combination at the federal maximum gross vehicle weight on Interstate highways (23 CFR 658.17).
How much is a semi-truck at maximum gross weight in pounds and ounces?
80,000 lb, which is 1,280,000 oz. In metric terms: 36,290 kg.
Is a semi-truck at maximum gross weight heavier than a blue whale?
No. a Semi-Truck at Maximum Gross Weight weighs exactly 40 US tons (36,290 kg), while a blue whale is about 150 t (165 US tons) — roughly 1/4.12.
Why do sources give different weights?
80,000 lb (36,287.39 kg) is the federal ceiling for a tractor-semitrailer on the Interstate System; the lower bridge-formula limit can control for particular axle spacings, and states may set lower limits for other roads.
Where does this number come from?
Every source is listed at the bottom of this page with publisher, link, access date and a verbatim quote. Numbers are only published when a qualifying source can be verified.