Dimensions

The numbers below used default configurations.

 Note: These were only tested in Half-Life 2 single player and Counter-Strike: Source. While other games will use this as a base, they are not guaranteed to match the values given here.

 Tip: For Team Fortress 2 dimensions, see Team Fortress 2 Mapper's Reference.

 Tip: For Day of Defeat: Source dimensions, see Day of Defeat: Source Mapper's Reference.

 Tip: For Alien Swarm dimensions, see Alien Swarm Mapper's Reference.

 Tip: For Counter-Strike: Global Offensive dimensions, see CS:GO Mapper's Reference.

 Tip: For SteamVR Home dimensions, see Environment Tutorial: Hammer and Basic Lighting.

 Tip: For Left 4 Dead series dimensions, see Dimensions in L4D2.

Source Engine Scale Calculations

The Source engine "game unit" corresponds to the Grid Unit in Hammer and XSI editors. The Scale used for Source game maps and models is based on the Imperial foot, so Metric measurements do not translate easily.

 Tip: Some handy online measurement conversion calculators include distance and speed. There is also another useful tool, which integrates into Hammer, for converting all three types of game units into metric or imperial units on-the-fly while working on objects.

 Note: Hammer units are equal to 3DSMax's generic units. The same rule applies for Blender (in all versions).

1. Maps, architecture, and some prop models use a scale of 1 foot = 16 units. This means that 1 unit = 0.01905 meters.
2. Skyboxes (which are 1/16th scale of ordinary maps) use 1 foot = 1 unit. This means that 1 unit = 0.3048 meters.
3. Human character models and certain other models for Source currently use 1 foot = 12 units.

Texturemaps are applied to models and brushwork in the Source engine and are therefore scaled relative to game units.

• At the default texturemap scale (0.25), 1 texture pixel = 0.25 x 0.25 units (or 4x4 texels = 1 grid unit). E.g., an (undistorted) 512 x 512 texture covers 128 x 128 game units.
• At the default lightmap scale (16), 1 lightmap pixel = 16 x 16 units.

Speed is usually given in map-units per second. To convert this to miles per hour, multiply by (15∕352). To convert it to kilometers per hour, multiply by (12069/176000)—which is just 15⁄352 multiplied by 1.6092, the conversion factor from miles to kilometers.

Map Grid Units: Quick Reference

Measurements not marked with a ~ are exact.

Architectural Scale (maps, architecture, certain models)

Grid	Imperial	Metric	Notes
1 u	¾ in	1.905 cm
2 u	1½ in	3.81 cm
4 u	3 in	7.62 cm
8 u	6 in	15.24 cm
16 u	1 ft	30.48 cm
28 u	1 ft 9 in	53.34 cm	Player view height (crouched)
32 u	2 ft	60.96 cm	Player collision width & length
36 u	2 ft 4 in	68.58 cm	Player collision height (crouched)
48 u	3 ft	91.44 cm	"Normal" door width
~52.49 u	~3 ft 3¼ in	1 m
64 u	4 ft	~1.219 m	Player view height (standing), "normal" corridor width
72 u	4 ft 6 in	~1.372 m	Player collision height (standing)
108 u	6 ft 9 in	2.057 m	"Normal" door height
128 u	8 ft	~2.438 m	"Normal" corridor height
~157.5 u	~9 ft 10 in	3 m
160 u	10 ft	3.048 m
256 u	16 ft	~4.877 m
~262.5 u	~16 ft 5 in	5 m
512 u	32 ft	~9.754 m
~524.9 u	~32 ft 10 in	10 m

Entity Scale (most characters, certain models, in-game)

Grid	Imperial	Metric
1 u	1 in	2.54 cm
2 u	2 in	5.08 cm
4 u	4 in	10.16 cm
8 u	8 in	20.32 cm
12 u	1 ft	30.48 cm
16 u	1 ft 4 in	40.64 cm
32 u	2 ft 8 in	81.28 cm
~39.37 u	~3 ft 3¼	1 m
64 u	5 ft 4 in	1.6256 m
~118.1 u	~9 ft 10 in	3 m
128 u	10 ft 8 in	3.2512 m
~196.9 u	~16 ft 5 in	5 m
256 u	21 ft 4 in	6.5024 m
~393.7 u	~32 ft 9 in	10 m
512 u	42 ft 8 in	13.0048 m

Skyboxes

Unit	Hammer	Imperial	Metric	Other/Notes
1 skybox grid unit	1 u	1 ft	0.341 m	Or 16 u within the main map
100 yards	300 u	300 ft	91.44 m
100 meters	~328.1 u	~328 1⁄12 ft	1 hm
¼ mile	1,320 u	1,320 ft	0.402 km	417½ yd, 402.3 m
1 mile	5,280 u	5,280 ft	1.609 km	1,670 yd; please don't make a skybox this big
1 acre	43,560 u² (208 u × 209 u)	43,560 ft² (66 ft × 660 ft)	~4,047 m²	1⁄640 mi², ~0.405 ha, 4840 yd²
1 hectare	~107,640 u² (~328 u × ~328 u)	~2.471 acres	10,000 m² (100 m × 100 m)	~11,960 yd²
2 acres	87,120 u²	87,120 ft²	~8,094 m²	1⁄320 mi², ~0.809 ha, 9,680 yd²
2 hectares	~215,280 u² (~464 u × ~464 u)	~4.942 acres (~464 ft × ~464 ft)	20,000 m²	~23,920 yd²

Player Collision Hull

These are the numerical values related to dimensions while mapping. They include the minimum space required for player passage. See also Player Hull.

Ground Obstacle Height

This is the maximum height, in units, an object can be while still allowing the player to walk over it.

• Crouched: 18
• Standing: 18

Overhead Obstacle Height

This is the minimum distance, in units, that can be between the ground and an object while still allowing the player to pass underneath.

• Crouched: 37 ( 48)
• Standing: 73 ( 63)

Minimum Path Size

This is the minimum size, in units, that can be between two objects while still allowing the player to pass between them.

• Width: 33 (Between collision surfaces oriented along the x or y axis.)
• Width: 46 (Walls rotated 45 degrees to grid.)
• Width: 65 (On-axis width between walls skewed to 45 degrees relative to grid.)
• Height: 37

Gradient

This is the maximum slope angle, in degrees from the horizontal, that the player can scale. Anything steeper than this is un-climbable.

• Gradient: 45.573°

Reach

• Automatic pick up item (ammo/weapon): 25 from center, i.e., 9 units beyond the Player Collision Hull.
• Max Distance to +use switch/door-handle/etc.: 82 units.

Player Viewpoint

Field of View

 Note: Change the default Horizontal FOV in by typing fov_desired xx in versions running on the engine or later, and fov xx in versions pre-Orange Box, where xx is the number in degrees.

• Player default = 75°
• View Model = 54° (viewmodel_fov)
• Suit Zoom = 25°
• Crossbow = 20°
• HL2 Jeep = 90° (r_jeepFOV)

Eye Level

This is the height above the floor on which the player is standing.

• Crouch: 28 units (+ Jump = 49 units)
• Stand/Walk/Run/Sprint: 64 units (+ Jump = 85 units)
• Jump: adds 21 units.

Player Movement Data

These are the numerical values for the various settings related to movement in Half-Life 2.

Speed

• Crouching: 63.3̅ (~2.7 mph, ~4.3 kph)
• Walking: 150 (~6.4 mph, ~10.3 kph)
• Running: 190 (~8.1 mph, ~13 kph)
• Sprinting : 320 (~13.6 mph, ~21.9 kph)
• Surface Swim Speed: 152 (~6.5 mph, ~10.4 kph)
• Surface Swim Fast Speed: 256 (~11.3 mph, ~17.6 kph)
• Surface Swim Slow Speed: 120 (~5.1 mph, ~8.2 kph)
• Aux power flashlight: 43 seconds

Sprinting

• Speed: 320 units per second (~13.6 mph, ~21.9 kph)
• Max Distance: 2560 (160 ft, ~48.8 m)
• Max Duration: 8 seconds
• Recovery time: 8 seconds

Sprinting With Flashlight

• Max Distance: 1920 (120 ft, ~36.6 m)
• Max Duration with flashlight: 6 seconds

Jumping

Vertical (To High Point)

This is the maximum height, in units, an object can be while still allowing the player to jump on top of it.

Half-Life 2

	Step	+Jump	+Jump-Crouch
Crouching	18	21	21
Standing	18	20	56
Walking	18	20	56
Running	18	20	56
Sprinting	18	20	56

Counter-Strike: Source

	Step	+Jump	+Jump+C	+C+Jump-C
Crouching	18	56	—	—
Standing	18	52	61	65
Walking	18	52	61	65
Running	18	52	61	65
Sprinting	18	52	61	65

Garry's Mod

	Step	+Jump	+Jump-Crouch
Crouching	18	21	21
Standing	18	30	68
Walking	18	30	68
Running	18	30	68
Sprinting	18	30	68

Horizontal (To Equal Height)

This is the maximum distance, in units, that can be between two objects of the same height, while still allowing the player to jump from one object to the other.

• Stationary: 84
• Stationary crouched: 40
• Crouched: 99 now 62

To do: what?

• Walking: N/A (will not jump while walking}
• Running: 176
• Running crouch-jump: 225
• Sprinting crouch-jump: 272

High Point to Low Point

This is the distance while falling to a lower point.

• Taking no damage: Drop 185 : Span 415.
• Taking 98 damage: Drop 692 : Span 540.

Jumping Using the Gravity Gun

Firing a single shot straight down at a prop_physics model (props_debris/metal_panel01a.mdl) = 350 units

Jumping, pulling, then firing, then pulling, and firing again = 400+ units

Falling Damage

This is the damage taken when falling straight down.

• Terminal velocity: 3500 (~149mph, ~240 kph)

Domain Minimum Domain Maximum Health Lost 000 240 0 241 249 2 250 257 4 258 265 6 266 274 9 275 282 11 283 292 13 293 301 15 302 309 18 310 318 20 319 327 22 328 337 24 338 347 27 348 357 29 358 366 31 367 376 34 377 387 36 388 396 38 397 408 40 409 417 43 418 428 45 429 439 47 440 450 49

Domain Minimum Domain Maximum Health Lost 451 461 52 462 472 54 473 483 56 484 495 59 496 507 61 519 529 65 530 542 68 543 554 70 555 567 72 568 579 75 580 592 77 593 604 79 605 617 81 618 630 84 631 643 86 644 656 88 657 670 90 671 683 93 684 697 95 698 711 97 712 725 99 726 <32768 100

 Note: Falling into water ≥2 units deep negates all fall damage.

Swimming Underwater

• Speed: 152 (~6.5 mph, ~10.4 kph)
• Sinking Speed (no keys): 48 (~2.0 mph, ~3.3 mph)
• Max Distance (no damage): 2523 (~158 ft, ~48 m)
• Max Distance (still alive): 3848 (~241 ft, ~73 m)
• Max Depth & return to surface (no damage): 1325 (~82.8 ft, ~25 m)
• Max Depth & return to surface (10 hp remaining): 2000 (125 ft, ~38 m)

Swimming Underwater With Flashlight

• Max Distance (no damage): 2170 (~136 ft, ~41 m)
• Max Distance (still alive): 3535 (~221 ft, ~67 m)
• Max Depth & return to surface (no damage): 1190 (~74 ft, ~23 m)
• Max Depth & return to surface (still alive): 1850 (~116 ft, ~35 m)

Vehicles

Buggy

• Buggy speed normal: 821.3 (~35 mph, ~56 kph)
• Buggy reverse: 469.3 (~20 mph, ~32 kph)
• Buggy speed turbo: 1173.3 (~50 mph, ~80 kph)
• Climb angles: ramp = 3900 l × 1670 h, 564 l × 504 h
• Climb angle from stopped: 63 deg
• Climb angle no turbo: 66 deg
• Climb angle turbo: 50° long, 42° short
• Jump distance normal: 216
• Jump distance turbo: 860
• Overhead obstacle height: 90
• Minimum path width: 118
• Stall depth: 40, sputters at 37

Airboat

• Airboat forward: 797.9 (~34 mph, ~55 kph)
• Airboat reverse: 797.9 (~34 mph, ~55 kph)
• Climb angle no full throttle momentum: 55
• Jump distance same height: 856
• Overhead obstacle height: 86
• Minimum path width: 86

Muscle Car

To do:  Muscle Car

See Also

• AI Metrics
• NPC Hull
• Exploits