Dinosaur Length Comparison (Meters)
How long was Argentinosaurus? Compare 15 dinosaur body lengths in meters and feet, from Argentinosaurus 35 m down to Carcharodontosaurus 12 m. See all 15.
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| Name | Value | Context | Source |
|---|---|---|---|
| Argentinosaurus 35 m. Largest row here. Press once claimed 40. | 35 m (114.8 ft) | Titanosaur, Argentina, Late Cretaceous | Paul, G.S. Princeton Field Guide to Dinosaurs 2nd ed.: Argentinosaurus over 35 m, 65-75 tonnes |
| Supersaurus 33 m. Largest diplodocid row here. | 33 m (108.3 ft) | Diplodocid, USA, Late Jurassic | Paul, G.S. Princeton Field Guide to Dinosaurs: Supersaurus about 33 m |
| Patagotitan 31 m. First reported as 37 to 40. | 31 m (101.7 ft) | Titanosaur, Argentina, Early Cretaceous | Carballido et al. 2017 Proc. R. Soc. B (37 m initial); Paul 2019 revision to 31 m, 50-55 tonnes |
| Puertasaurus 30 m. Known from few bones, range noted. | 30 m (98.4 ft) | Titanosaur, Argentina, Late Cretaceous | Paul, G.S. Princeton Field Guide to Dinosaurs: Puertasaurus about 30 m |
| Sauroposeidon 27 m. Tallest stance here, not longest. | 27 m (88.6 ft) | Brachiosaurid, USA, Early Cretaceous | Paul, G.S. Princeton Field Guide to Dinosaurs: Sauroposeidon about 27 m |
| Diplodocus 26 m. Long tail, light build. | 26 m (85.3 ft) | Diplodocid, USA, Late Jurassic | Paul, G.S. Princeton Field Guide to Dinosaurs: Diplodocus about 26 m; Benson et al. mass 14.8 tonnes (USNM 10865) |
| Dreadnoughtus 26 m. Most complete giant skeleton. | 26 m (85.3 ft) | Titanosaur, Argentina, Late Cretaceous | Lacovara et al. 2014 Sci. Rep.: Dreadnoughtus about 26 m, 59.3 tonnes (MPM-PV 1156) |
| Futalognkosaurus 26 m. Near complete neck and back. | 26 m (85.3 ft) | Titanosaur, Argentina, Late Cretaceous | Calvo et al. description; Paul mass about 30 tonnes; length about 26 m |
| Giraffatitan 23 m. Berlin mount specimen. | 23 m (75.5 ft) | Brachiosaurid, Tanzania, Late Jurassic | Paul, G.S. Princeton Field Guide: Giraffatitan about 23 m; Benson et al. mass 34 tonnes (HMN SII) |
| Apatosaurus 23 m. Heavier than Diplodocus at same length. | 23 m (75.5 ft) | Diplodocid, USA, Late Jurassic | Paul, G.S. Princeton Field Guide to Dinosaurs: Apatosaurus about 23 m |
| Brachiosaurus 22 m. Shorter tail than diplodocids. | 22 m (72.2 ft) | Brachiosaurid, USA, Late Jurassic | Paul, G.S. Princeton Field Guide to Dinosaurs: Brachiosaurus about 22 m |
| Spinosaurus 14 m. Largest meat eater here. | 14 m (45.9 ft) | Spinosaurid, North Africa, Late Cretaceous | Ibrahim et al. 2014 Science and 2020 Nature: Spinosaurus 14-15 m |
| Giganotosaurus 13 m. Slightly over T. rex in length. | 13 m (42.7 ft) | Carcharodontosaurid, Argentina, Late Cretaceous | Coria and Salgado description; Paul estimate 12-13 m |
| Tyrannosaurus 12.3 m. Sue specimen, Chicago. | 12.3 m (40.4 ft) | Tyrannosaurid, USA, Late Cretaceous | Field Museum Sue (FMNH PR 2081): 12.3 m long |
| Carcharodontosaurus 12 m. African rival to T. rex size. | 12 m (39.4 ft) | Carcharodontosaurid, North Africa, Late Cretaceous | Sereno et al. description; Paul estimate about 12 m |
About this converter
Sauropods own the top of this table. Argentinosaurus leads at 35 m, Supersaurus follows at 33, Patagotitan at 31 and Puertasaurus at 30. Mid size sauropods cluster near 26: Sauroposeidon 27, Diplodocus 26, Dreadnoughtus 26 and Futalognkosaurus 26. Smaller sauropods close the plant eater rows with Giraffatitan 23, Apatosaurus 23 and Brachiosaurus 22. The largest meat eaters are far shorter: Spinosaurus 14, Giganotosaurus 13, Tyrannosaurus 12.3 and Carcharodontosaurus 12. One Argentinosaurus matches almost three Tyrannosaurus nose to tail.
How to use it
Pick two dinosaurs and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try 1 Argentinosaurus against a Tyrannosaurus to see the near three to one gap in meters or feet.
Lengths are total body estimates from published skeletal reconstructions, not single bone guesses. Patagotitan first made news at 37 to 40 m in 2014 press reports, then settled at 31 m in later volumetric work, so the table pins 31 and notes the older claim. Maraapunisaurus stays out because its size rests on one lost bone and estimates span 30 to 60 m. Amphicoelias stays out for the same reason.
FAQ
What is the largest dinosaur on this list?
Argentinosaurus at about 35 m and 65 to 75 tonnes, per Paul 2019 volumetric work. Patagotitan at 31 m is the most complete giant, so it is cited more often.
What is the largest meat eater here?
Spinosaurus at about 14 m, ahead of Giganotosaurus at 13 and Tyrannosaurus at 12.3. No meat eater here reaches half of Argentinosaurus.
Why do some sites say Patagotitan is 40 meters?
Early 2014 press reports said 37 to 40 m. Later study revised it to 31 m and 50 to 60 tonnes. The table pins 31 and notes the older claim.
Is Maraapunisaurus included?
No. Its size rests on one lost vertebra with estimates from 30 to 60 m. It stays out rather than guessed at.
Sources
- Paul, G.S. The Princeton Field Guide to Dinosaurs 2nd ed. (2016) and 2019 revision (Argentinosaurus 35 m, Supersaurus 33 m, sauropod lengths)
- Carballido et al. 2017 Proc. R. Soc. B: A new giant titanosaur (Patagotitan 37 m initial, mass 69 tonnes)
- Lacovara et al. 2014 Sci. Rep.: Dreadnoughtus schrani (26 m, 59.3 tonnes, MPM-PV 1156)
- Ibrahim et al. 2014 Science and 2020 Nature (Spinosaurus 14-15 m); Field Museum Sue specimen data (T. rex 12.3 m)
Last verified: 2026-10-02 · 15 entries
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