1:64 Scale Guide: Real Sizes, Dimensions and Conversions
The reference every 1/64 build should start from
Scale is a ratio, not a size. Convert one measurement and the rest gets easier.
FREE DOWNLOAD
The printable A4 reference sheet
Everything in the guide as a two-page A4 PDF, generated from the same tables, with a printable scale bar you can cut out and hold against a model.
IN SHORT
- Divide the real measurement by 64 to get the model measurement.
- A mid-size car at true 1:64 is 64 to 73 mm long.
- Every number comes from one reference car you can check against.
70.6 mm
Reference car length at 1:64
27.3 mm
Adult figure height at 1:64
33 x 38 mm
Garage door at 1:64
2.0 mm
Kerb height at 1:64
THE RULE
What 1:64 actually means
One millimetre of diecast stands in for 64 millimetres of real steel.
Model dimension = real dimension divided by 64. A 4,519 mm car becomes 70.6 mm, a 1,750 mm person 27.3 mm, a 125 mm kerb 2 mm.
That kerb is where builds go wrong: scale accuracy means every object is shrunk by the same factor, and a kerb reading 4 mm tells the eye the car is a toy.
THE REFERENCE CAR
How big is a 1:64 car?
A sports car or sedan at true 1:64 measures 64 to 73 mm long.
Every figure here comes from one car, the 2020 Porsche 911 Carrera S, so you can check any other measurement against it.
Other body styles: a 4,050 mm hatchback is 63.3 mm, a 4,570 mm sedan 71.4 mm, a 5,900 mm pickup 92.2 mm.
The reference car, from real dimensions to model dimensions
| Real car (911 Carrera S) | Real size | At 1:64 |
|---|---|---|
| Length | 4,519 mm | 70.6 mm (2.78 in) |
| Width (body, no mirrors) | 1,852 mm | 28.9 mm (1.14 in) |
| Height | 1,300 mm | 20.3 mm (0.80 in) |
SCALE BY SCALE
The same car at every scale
The same reference car at every scale you are likely to meet.
The 1:87 row is worth reading twice: model railway scenery is close enough to 1:64 that trees and figures read correctly next to a diecast car, at a fraction of the price.
The reference car at every common scale
| Scale | Length | Width | Height | Typical use |
|---|---|---|---|---|
| 1:12 | 376.6 mm | 154.3 mm | 108.3 mm | Large collector models, motorways |
| 1:18 | 251.1 mm | 102.9 mm | 72.2 mm | Display-grade diecast, garage collections |
| 1:24 | 188.3 mm | 77.2 mm | 54.2 mm | Detailed diecast and plastic kits |
| 1:32 | 141.2 mm | 57.9 mm | 40.6 mm | Slot cars, mid-size diecast |
| 1:43 | 105.1 mm | 43.1 mm | 30.2 mm | European collector standard |
| 1:64 | 70.6 mm | 28.9 mm | 20.3 mm | Hot Wheels, Matchbox, Mini GT, dioramas |
| 1:87 | 51.9 mm | 21.3 mm | 14.9 mm | HO model railway scenery |
SCENERY SIZES
Everyday objects at 1:64
The dimensions you will measure most often, converted.
Two are worth memorising: a garage door is 33 by 38 mm and a garage bay floor 42 by 86 mm. Those define the footprint of most workshop dioramas.
Figures sold as "1:64" measure 30 to 40 mm, because sculpted figures use heroic proportions. Let the architecture set the scale.
Everyday objects and their size at 1:64
| Object | Real size | At 1:64 |
|---|---|---|
| Adult human figure | 1,750 mm | 27.3 mm |
| Interior door | 2,030 mm | 31.7 mm |
| Residential garage door | 2,130 × 2,440 mm | 33.3 × 38.1 mm |
| Single garage bay | 2,700 × 5,500 mm | 42.2 × 85.9 mm |
| Parking space | 2,500 × 5,000 mm | 39.1 × 78.1 mm |
| Single traffic lane | 3,600 mm | 56.3 mm |
| Standard traffic sign | 600 × 600 mm | 9.4 × 9.4 mm |
| Kerb height | 125 mm | 2.0 mm |
| Street lamp | 8,000 mm | 125.0 mm |
| Workbench | 1,800 × 700 × 900 mm | 28.1 × 10.9 × 14.1 mm |
| Wheelie bin | 1,100 × 1,000 × 1,400 mm | 17.2 × 15.6 × 21.9 mm |
| Two-post lift base | 2,400 mm | 37.5 mm |
A CAVEAT
Why brands are not always true to scale
The scale on the box is what it was sold as, not what it is.
Mini GT, Tarmac Works, Inno64 and Kaido House build close to true 1:64. Hot Wheels and Matchbox do not: their castings are sized for the blister card and the track.
- Build around Mini GT or Tarmac Works cars for a consistent scene.
- Measure a Hot Wheels car in your hand rather than trusting the box.
- Never mix a true-scale car with a not-true-scale car in one shot.
THE MATHS
Converting between two scales
It is a conversion of scale factors, not of lengths.
Target dimension = known dimension × (known N ÷ target N). To take a 4,519 mm car to 1:43, multiply by 1.4884: 4,519 × 1.4884 = 6,726 mm, which is exactly 4,519 ÷ 43 = 105.1 mm.
For a 3D model the same maths becomes a slicer percentage: how to resize an STL file for 1:64.
How much to multiply a 1:64 model to change its scale
| From | To | Multiply the model by |
|---|---|---|
| 1:64 | 1:43 | 1.4884 (148.84%) |
| 1:64 | 1:32 | 2.0000 (200%) |
| 1:64 | 1:24 | 2.6667 (266.67%) |
| 1:64 | 1:18 | 3.5556 (355.56%) |
| 1:64 | 1:87 | 0.7385 (73.85%) |
SHORTCUTS
Tools that do the maths for you
Doing this in your head is how a garage ends up with a 40 mm door.
Keep one car on the bench while you build. If a door looks too tall next to it, it is too tall.
- The ToolHuts Model Scale Converter gives dimensions, slicer percentage and a printable scale bar.
- The Resources & Database category collects model databases and reference tools.
- A digital caliper, and a printable scale bar for checking props.
What does 1:64 scale mean?
One unit on the model equals 64 of the same unit on the real object. A 4,519 mm real car becomes 70.6 mm at 1:64.
How long is a 1:64 scale car in real life?
A mid-size sedan of 4,570 mm becomes 71.4 mm at 1:64, roughly 2.8 inches. Ordinary cars at true 1:64 fall between 64 and 73 mm long.
How do I convert a model from 1:64 to 1:43?
Multiply by 1.4884, which is 64 divided by 43. A 70.6 mm car at 1:64 becomes 105.1 mm at 1:43.
Are Hot Wheels exactly 1:64?
No. Their castings are sized for the blister card. Mini GT and Inno64 sit much closer to true 1:64.
Keep Building
The directory collects 36 vetted resources for 1/64 scale dioramas, from scratch-build blogs and STL repositories to forums, stores, and model databases.
How to Build a 1:64 Scale Diorama
The full beginner method: planning, base, textures, scale check, paint, light, and photography.
1/64 Garage Diorama: Ideas, Kits & Build
Garage dimensions, four DIY construction methods, and where to buy ready-made kits.
How to Resize an STL Model for 1:64
The exact slicer percentage, worked examples, and the checks that prevent squashed prints.
NEXT STEP
Find the part you are missing
Every guide links to the category that covers where the parts come from. Browse the full directory when you would rather see everything in one place.