Dimensions (Half-Life 2 and Counter-Strike: Source)
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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: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 
3DS Max's generic units. The same rule applies for 
Blender (in all versions).
Note:Change the default Horizontal FOV in by typing 
engine or later, and
Sprinting With Flashlight (not in
Note:Falling into water ≥2 units deep negates all fall damage.
For others, see 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.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.
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 3DS Max's generic units. The same rule applies for Blender (in all versions).- Maps, architecture, and some prop models use a scale of 1 foot = 16 units.
- Skyboxes use 1 foot = 1 unit if sky_camera has a scale of 16 units.
- 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). For kilometers per hour, multiply initial value by (12069/176000), or multiply mph value by 1.6092.
Map Grid Units: Quick Reference
| Grid | Imperial | Metric | Notes |
|---|---|---|---|
| 1 | ¾″ | 1.905 cm | |
| 2 | 1½″ | ~4 cm | |
| 4 | 3″ | ~7.5 cm | |
| 8 | 6″ | ~15 cm | |
| 16 | 1′ | ~30 cm | |
| 28 | 1′ 9″ | ~55 cm | Player view height (crouched) |
| 32 | 2′ | ~60 cm | Player collision width & length |
| 36 | 2′ 4″ | ~70 cm | Player collision height (crouched) |
| 48 | 3′ | ~90 cm | "Normal" door width |
| ~52.49344 | ~3′ 3¼″ | 1 m | |
| 64 | 4′ | ~1.2 m | Player view height (standing), "normal" corridor width |
| 72 | 4′ 6″ | ~1.4 m | Player collision height (standing) |
| 108 | 6′ 9″ | ~2 m | "Normal" door height |
| 128 | 8′ | ~2.5 m | "Normal" corridor height |
| 160 | 10′ | ~3 m | |
| 256 | 16′ | ~5 m | |
| 512 | 32′ | ~9.75 m |
| Grid | Imperial | Metric |
|---|---|---|
| 1 | 1″ | 2.54 cm |
| 2 | 2″ | ~5 cm |
| 4 | 4″ | ~10 cm |
| 8 | 8″ | ~20 cm |
| 12 | 1′ | ~30 cm |
| 16 | 1′ 4″ | ~40 cm |
| 32 | 2′ 8″ | ~80 cm |
| ~39.37 | ~3′ 3¼″ | 1 m |
| 64 | 5′ 4″ | ~1.6 m |
| 128 | 10′ 8″ | ~3.25 m |
| 256 | 21′ 4″ | ~6.5 m |
| 512 | 42′ 8″ | ~13 m |
Skyboxes
| Unit | Hammer | Imperial | Metric | Other/Notes |
|---|---|---|---|---|
| 1 skybox grid unit | 1 | 1 ft | ~0.35 m | 16 units within the main map |
| 100 yards | 300 | 300 ft | ~92 m | |
| 100 meters | ~328.1 | ~328 1⁄12 ft | 1 hm | |
| 1 mile | 5,280 | 5,280 ft | ~1.6 km | 1,670 yd |
| 1 acre | 208 × 209 | 43,560 ft² (66 ft × 660 ft) | ~4,047 m² | 1⁄640 mi², ~0.405 ha, 4840 yd² |
| 1 hectare | ~328 × ~328 | ~2.471 acres | 10,000 m² (100 m × 100 m) | ~11,960 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
|
Overhead Obstacle Height
|
Minimum Path Size
|
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: 63.3 (~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 (not in 
)
- 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.
| Step | +Jump | +Jump-Crouch | |
|---|---|---|---|
| Crouching | 18 | 21 | 21 |
| Standing | 18 | 20 | 56 |
| Walking | 18 | 20 | 56 |
| Running | 18 | 20 | 56 |
| Sprinting | 18 | 20 | 56 |
| 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 |
| 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
Todo: 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)
|
|
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
Todo: Muscle Car