Hammer unit

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We only got two speeds: fast and faster!
The Engineer measuring projectiles' HU/s

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.

Ratios to Foot

  • Maps, architecture and prop models: 1 foot = 16 HU. This means 1 unit is approximately equal to 1.905 centimeters.

This ratio is used to judge the speed of projectiles and players.

List of projectiles
Projectile Weapon Speed (HU/s) Arcs Sticks Reflectable Can be destroyed by
Mad Milk
Jar
Leaderboard class scout.png Mad Milk
1019.9
Pictogram tick.png Yes Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Mutated Milk
Jar
Leaderboard class scout.png Mutated Milk
Flying Guillotine
Cleaver
Leaderboard class scout.png Flying Guillotine
3000
Pictogram tick.png Yes Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Sandman Baseball.png
Baseball
Leaderboard class scout.png Sandman
3000
Pictogram tick.png Yes Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Festive ornament red.png
Bauble
Leaderboard class scout.png Wrap Assassin
Rocket.png
Rocket
Leaderboard class soldier.png Rocket Launcher
Black Box
Rocket Jumper
Original
Beggar's Bazooka
1100
Pictogram cross.png No Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Leaderboard class soldier.png Direct Hit
1980
Leaderboard class soldier.png Liberty Launcher
1540
RED Cow Mangler 5000 Beam.png
Large energy beam
Leaderboard class soldier.png Cow Mangler 5000
1100
  • Short Circuit
Air Strike Projectile.png
Rocket
Leaderboard class soldier.png Air Strike
  • Short Circuit
RED Righteous Bison Beam.png
Small energy beam
Leaderboard class soldier.png Righteous Bison
1200
Pictogram cross.png No Pictogram cross.png No Pictogram cross.png No
Dragon's Fury fireball.png
Fireball
Leaderboard class pyro.png Dragon's Fury
3000
Pictogram cross.png No Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Flare proj red.png
Flare
Leaderboard class pyro.png Flare Gun
Scorch Shot
2000
Pictogram tick.png Yes Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Detonator proj red.png
Flare
Leaderboard class pyro.png Detonator
Flare proj red.png
Flare
Leaderboard class pyro.png Manmelter
3000
RED Gas Passer.png
Gas Can
Leaderboard class pyro.png Gas Passer
2009.2
Pictogram tick.png Yes Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Grenade proj red.png
Grenade
Leaderboard class demoman.png Grenade Launcher
1216.6
Pictogram tick.png Yes Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Leaderboard class demoman.png Loch-n-Load
1513.3
Loose Cannon proj red.png
Cannonball
Leaderboard class demoman.png Loose Cannon
1453.9
RED Iron Bomber Projectile.png
Grenade
Leaderboard class demoman.png Iron Bomber
1216.6
Sticky proj red.png
Stickybomb
Leaderboard class demoman.png Stickybomb Launcher
925.38 2409.2
Pictogram tick.png Yes Pictogram neutral.png To world Pictogram tick.png Yes In air:
  • Short Circuit

On surface:

  • Bullets
  • Melee weapons
  • Syringes
  • Scottish Resistance
  • Quickiebomb Launcher
  • Short Circuit
  • Detonator
  • Scorch Shot
Scores proj red.png
Stickybomb
Leaderboard class demoman.png Scottish Resistance
Sticky Jumper bomb RED.png
Stickybomb
Leaderboard class demoman.png Sticky Jumper
RED Quickiebomb Launcher Projectile.png
Stickybomb
Leaderboard class demoman.png Quickiebomb Launcher
930.88 2409.2
Sentry Rocket.png
Rocket
Leaderboard class engineer.png Sentry Gun (Level 3)
1100
Pictogram cross.png No Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
RED Pomson 6000 Beam.png
Small energy beam
Leaderboard class engineer.png Pomson 6000
1200
Pictogram cross.png No Pictogram cross.png No Pictogram cross.png No
Rescue Ranger Projectile RED.png
Repair claw
Leaderboard class engineer.png Rescue Ranger
2400
Pictogram tick.png Yes Pictogram tick.png Yes Pictogram tick.png Yes
  • Short Circuit
RED Syringe Gun Ammo.png
Syringe
Leaderboard class medic.png Syringe Gun
Blutsauger
Overdose
1000
Pictogram tick.png Yes Pictogram neutral.png To world Pictogram cross.png No
Leaderboard class medic.png Crusader's Crossbow
2400
Pictogram tick.png Yes Pictogram tick.png Yes Pictogram tick.png Yes
  • Short Circuit
Arrow proj.png
Arrow
Leaderboard class sniper.png Huntsman
Fortified Compound
1812.1 2600
Pictogram tick.png Yes Pictogram tick.png Yes Pictogram tick.png Yes
  • Short Circuit
Jarate
Jar
Leaderboard class sniper.png Jarate
1017.9
Pictogram tick.png Yes Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
Self-Aware Beauty Mark
Jar
Leaderboard class sniper.png Self-Aware Beauty Mark
Grappling Hook Projectile.png
Grappling Hook
TF2 crosshair orange.png Grappling Hook
1500
Pictogram cross.png No Pictogram tick.png Yes Pictogram cross.png No
Item icon Unknown.png
Halloween Spells
TF2 crosshair orange.png Halloween Spells
422.17 1019.8
Pictogram neutral.png Sometimes Pictogram cross.png No Pictogram cross.png No
Monoculus proj.png
Rocket
Monoculus angry.png MONOCULUS
330 1100
Pictogram cross.png No Pictogram cross.png No Pictogram tick.png Yes
  • Short Circuit
  • 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

Leaderboard class soldier.png Soldier

Project Excelsior
Project Excelsior
Parachute 19.47 miles.

Leaderboard class demoman.png Demoman

Operation High Dive
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.