Tank Gun Caliber Comparison (Official MM)
Compare 14 tank main gun calibers: Panzer II 20, Sherman 75, Tiger 88, Pershing 90, Centurion 105, Abrams 120, T-72 125. Official bore diameters in mm listed.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Panzer II Ausf F 20 mm. Smallest row here. | 20 mm | German WWII light tank, KwK 30 | Panzermuseum Munster: Panzer II 20mm KwK 30 |
| Panzer III Ausf J 50 mm. Late standard. | 50 mm | German WWII medium tank, KwK 39 | Tank Museum Bovington: Panzer III 50mm KwK 39 |
| M4 Sherman 75 mm. 76 mm variant noted. | 75 mm | US WWII medium tank, M3 gun | US Army collection: M4 Sherman 75mm M3 |
| Panther Ausf G 75 mm. L/70 high velocity. | 75 mm | German WWII medium tank, KwK 42 | Tank Museum Bovington: Panther 75mm KwK 42 |
| T-34 Model 1942 76.2 mm. T-34/85 noted. | 76.2 mm | Soviet WWII medium tank, F-34 | Kubinka Museum: T-34 76.2mm F-34 |
| Tiger I Ausf E 88 mm. L/56 barrel. | 88 mm | German WWII heavy tank, KwK 36 | Tank Museum Bovington: Tiger I 88mm KwK 36 |
| Tiger II 88 mm. L/71 barrel. Ties Tiger I. | 88 mm | German WWII heavy tank, KwK 43 | Tank Museum Bovington: Tiger II 88mm KwK 43 |
| M26 Pershing 90 mm. | 90 mm | US late WWII heavy tank, M3 gun | US Army collection: M26 Pershing 90mm M3 |
| Centurion Mk 5 105 mm. Early 83.8 noted. | 105 mm | British Cold War tank, L7 gun | Tank Museum Bovington: Centurion 105mm L7 |
| Leopard 2A6 120 mm. L/55 smoothbore. | 120 mm | German modern tank, Rh-120 gun | Rheinmetall: Leopard 2 Rh-120 120mm |
| M1A1 Abrams 120 mm. US Rh-120 version. | 120 mm | US modern tank, M256 gun | US Army PEO: M1A1 Abrams 120mm M256 |
| Challenger 2 120 mm. Rifled, not smoothbore. | 120 mm | British modern tank, L30A1 gun | Tank Museum Bovington: Challenger 2 120mm L30A1 |
| T-72B 125 mm. Priciest row here. | 125 mm | Soviet Cold War tank, 2A46 gun | Kubinka Museum: T-72 125mm 2A46 |
About this converter
Tank gun caliber reads bore diameter in millimeters, and this table runs WWII to modern. Panzer II opens at 20. Panzer III reads 50 against early 37 mm models. M4 Sherman and Panther read 75 each with very different rounds and barrels. T-34 reads 76.2. Tiger I and Tiger II read 88 each with L/56 and L/71 barrels. M26 Pershing reads 90. Centurion Mk 5 reads 105 after early 83.8 mm guns. Leopard 2A6, M1A1 Abrams and Challenger 2 read 120 each with smoothbore Rh-120 and M256 beside rifled L30A1. T-72B tops the table at 125 with its autoloader. One T-72B bore equals more than six Panzer II bores. Caliber alone never decides penetration, since barrel length, round and fire control matter as much.
How to use it
Pick two tanks and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try 1 T-72B against Panzer IIs to see how many light barrels one modern smoothbore matches.
Rows pin museum and maker specs with gun designations in context. Early variant guns like Panzer III 37 mm and Centurion 83.8 mm stay noted per row rather than listed twice. M4 76 mm and T-34/85 variants stay noted beside their base rows. Challenger 3 moves to smoothbore while Challenger 2 keeps rifled, and the row pins the L30A1.
FAQ
What does caliber mean here?
Bore diameter in millimeters. This table runs 20 mm on Panzer II to 125 mm on T-72B, with gun designations in context.
What is the biggest caliber here?
125 mm with the 2A46 autoloader gun. Leopard 2A6, Abrams and Challenger 2 follow at 120 mm each.
How do the Tigers differ?
Same 88 mm caliber with different barrels: L/56 on Tiger I and L/71 on Tiger II. Caliber alone never decides penetration.
What is the smallest here?
20 mm with the KwK 30. Panzer III follows at 50 mm and Sherman plus Panther at 75 mm each.
Sources
- Tank Museum Bovington vehicle data sheets (Panzer III, Panther, Tiger I, Tiger II, Centurion, Challenger 2)
- Kubinka Tank Museum records (T-34, IS series cross checks, T-72)
- US Army Armor and Cavalry Collection records (Sherman, Pershing)
- Panzermuseum Munster records (Panzer II)
- Rheinmetall Rh-120 product page, US Army PEO Abrams fact sheet
Last verified: 2026-10-01 · 13 entries
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