IS
USSR·
Heavy Tank·HT breakThe IS-1 (IS-85) heavy tank was a thorough modernization of the KV-1. The tank featured the 85-mm D-5T gun. The IS-1 entered mass production in October 1943, but work was discontinued at the beginning of 1944, as the IS-2 (IS-122) tank entered mass production in December 1943. A total of 107 vehicles were manufactured.
Armor thicknessMeasured
Nominal plate thickness straight from the game client. Click any plate to highlight it on the 3D model and focus the camera on it.
Hull
All 15 plates
Turret 2 of 2
All 14 plates
Specifications
- DPM
- 1,902
- Damage
- 390
- Penetration
- 175 mm
- … at 500m
- 152 mm
- Reload time
- 12.30 s
- Rate of fire
- 4.88/min
- Aim time
- 3.40 s
- Dispersion
- 0.460 m
- … moving
- 0.210
- … tank traverse
- 0.210
- … turret traverse
- 0.160
- … after firing
- 4.0
- Damage vs. modules
- 165
- Caliber
- 122.0 mm
- Shell velocity
- 780 m/s
- Max range
- 720 m
- Ammo capacity
- 28
- Potential damage
- 10,920
- Shell cost
- 1,025 cr
- Top speed
- 34 km/h
- Reverse speed
- 14 km/h
- Power/weight
- 16.22 hp/t
- Tank traverse
- 42.0 °/s
- Turret traverse
- 28.0 °/s
- Effective top speed
- … hard
- 34.0 km/h
- … medium
- 34.0 km/h
- … soft
- 28.2 km/h
- Effective traverse
- … hard
- 42.0 °/s
- … medium
- 33.0 °/s
- … soft
- 20.1 °/s
- Gun elevation
- 25 °
- Gun depression
- 6 °
- Gun traverse range
- 360°
- Terrain resistance
- … hard
- 1.10
- … medium
- 1.40
- … soft
- 2.30
- Hull armor
- 120 / 90 / 60
- Turret armor
- 100 / 90 / 90
- Health
- 1,350
- Engine health
- 370
- … repaired
- 185
- Track health
- 190
- … repaired
- 145
- … repair time
- 6.86 s
- Ammo rack health
- 180
- … repaired
- 120
- Fuel tank health
- 175
- … repaired
- 70
- Total weight
- 46,230 kg
- Stationary camo
- 6.95 / 1.46%
- Moving camo
- 3.50 / 0.73%
- View range
- 350 m
- Fire chance
- 12%
- Tank cost
- 1,424,000 cr
360° traverse
CommanderRadio Operator
Gunner
Driver
Loader
Module research
Server performance
Aggregate stats from NA players over the last 30d
Aggregated from 1,628 tracked NA players · 14,404 battles. Coverage grows as more players are tracked.
Reach these combined damage (dealt + assist) values over a rolling window to earn marks of excellence.
Performance over time
Daily NA 30-day aggregates — how this tank trends as patches and meta shift
Population spread
How NA players actually perform in this tank (30-day window)
Top players
Highest performers in the IS on NA
Video reviews
Curated reviews, replays, and guides from veteran players
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Similar tanks
Closest matches by stat profile — pick the ones that fit your playstyle.
Balance changelog
What changed for this tank between game versions
- 2.0Sep 1, 2025
- Traverse speed3238
- Mobility on medium terrain——
- Mobility on soft terrain——
- Traverse speed3542
- EngineV-2ISV-2 (IS)
- Power600700
- EngineV-2-54ISV-2-54 (IS)
- Power700750
- Vehicle durability11301280
- View range330340
- Vehicle durability12301350
- GunIS-85 / 85 mm D-5Tremoved
- GunIS-85 / 100 mm D10TIS-85 / 100 mm D-10T (IS)
- GunIS-85 / 85 mm D5T-85BMIS-85 / 85 mm D-5T (IS)
- Reload time5.84.6
- Aiming time2.92.5
- Dispersion on turret traverse——
- Dispersion after firing——
- AP penetration144164
- GunIS-122 / 85 mm D-5Tremoved
- GunIS-122 / 85 mm D5T-85BMIS-122 / 85 mm D-5T (IS)
- Reload time5.84.6
- Aiming time2.92.5
- Dispersion on turret traverse——
- Dispersion after firing——
- AP penetration144164
- Ammo rack capacity5968
- GunIS-122 / 100 mm D10TIS-122 / 100 mm D-10T (IS)
- GunIS-122 / 122 mm D-2-5Tremoved
- GunIS-122 / 122 mm D-25TIS-122 / 122 mm D-25T (IS)