Hammer unit
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“ | We only got two speeds: fast and faster!
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— The Engineer measuring projectiles' HU/s
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Hammer unit, often abbreviated as HU, is the unit of length measurement used by Valve's Source Engine games.
The scale used for Source game is based on the Imperial Foot, so Metric measurements do not translate easily. 16 units is equal to 1 foot, which means 1 unit is approximately equal to 1.905 centimeters.
Ratios to Foot
- Maps, architecture and prop models: 1 foot = 16 HU. This ratio is used to judge the speed of projectiles and players.
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Projectile | Weapon | Speed (Hu/s) | Arcs | Sticks | Reflectable | Can be destroyed by | |||
![]() Jar |
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Mad Milk |
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![]() Jar |
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Mutated Milk | |||||||
![]() Cleaver |
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Flying Guillotine |
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![]() Baseball |
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Sandman |
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![]() Bauble |
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Wrap Assassin | |||||||
![]() Rocket |
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Rocket Launcher Black Box Rocket Jumper Original Beggar's Bazooka |
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Direct Hit |
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Liberty Launcher |
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![]() Large energy beam |
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Cow Mangler 5000 |
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![]() Rocket |
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Air Strike |
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![]() Small energy beam |
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Righteous Bison |
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![]() Fireball |
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Dragon's Fury |
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![]() Flare |
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Flare Gun Scorch Shot |
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![]() Flare |
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Detonator | |||||||
![]() Flare |
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Manmelter |
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![]() Gas Can |
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Gas Passer |
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![]() Grenade |
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Grenade Launcher |
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Loch-n-Load |
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![]() Cannonball |
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Loose Cannon |
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![]() Grenade |
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Iron Bomber |
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![]() Stickybomb |
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Stickybomb Launcher |
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In air:
On surface:
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![]() Stickybomb |
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Scottish Resistance | |||||||
![]() Stickybomb |
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Sticky Jumper | |||||||
![]() Stickybomb |
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Quickiebomb Launcher |
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![]() Rocket |
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Sentry Gun (Level 3) |
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![]() Small energy beam |
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Pomson 6000 |
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![]() Repair claw |
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Rescue Ranger |
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![]() Syringe |
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Syringe Gun Blutsauger Overdose |
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Crusader's Crossbow |
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![]() Arrow |
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Huntsman Fortified Compound |
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![]() Jar |
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Jarate |
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![]() Jar |
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Self-Aware Beauty Mark | |||||||
![]() Grappling Hook |
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Grappling Hook |
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![]() Magic Spells |
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Magic Spells |
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![]() Rocket |
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MONOCULUS |
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- Skyboxes (which are 1/16th scale of ordinary maps) use 1 foot = 1 HU.
- Human Character models and certain other models for Source Engine currently use 1 foot = 12 HU.
Related achievements
Soldier
Project Excelsior Parachute 19.47 miles. |
Demoman
Operation High Dive Parachute 19.47 miles. |
Related Contracts
A number of Mercenary Park Contracts, such as "Long range arrow kill" for the Sniper and "Long range heal with the Crusader's Crossbow" for the Medic are reliant upon Hammer Units for calculation.
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