How long does a typical plastic kit take to build?

A simple 1:72 kit might take 5-10 hours. A standard 1:48 kit takes 15-30 hours. A detailed 1:32 aircraft with aftermarket can take 60-100+ hours. Competition builds at any scale can take 100+ hours due to the attention to detail required.

What takes the most time in a build?

Assembly is usually the single largest block — typically 50-60% of total time on a clean build — because every part has to be cleaned up, test-fitted and glued. Painting and finishing come next at roughly 20-30%, preparation (sanding, filling, seam work) around 10-15%, and weathering the remainder. Adding photo-etch or aftermarket parts can double the assembly time alone, and a complex multi-colour scheme can push painting toward parity with assembly.

How does scale affect build time?

Larger scales take longer because parts are bigger and there is more surface to paint and detail. However, they are often easier to handle. Smaller scales can be fiddly but have fewer parts. The sweet spot for build time is usually 1:48 or 1:72.

Does experience speed up builds significantly?

Yes. An experienced modeller typically works 30-50% faster than a beginner. However, experienced modellers often add more detail and spend more time on finishing, so their builds may not be shorter overall.

ModelCalcs

Build Time Estimator — Kit Build Duration

Estimate total build hours based on kit complexity, scale, and your detail level.

Parts Count

Total number of parts on the sprues

ScaleLarger scales weigh build time up (more surface to detail and paint). 1:48 is the baseline (×1.0). Choose Custom to enter your own effort multiplier.

Subject TypeDifferent subjects have different per-part complexity

Detail LevelHigher detail levels multiply assembly time significantly

Photo-Etch SetPE sets add fine detail but significantly increase build time

Paint SchemeMore complex paint schemes require masking and multiple sessions

How We Calculate This

Calculates build time by multiplying parts count by per-part time estimates, adjusted for subject type, scale, detail level and paint complexity.

Formula

Assembly = Parts × Base mins × Scale × Detail × PE factor
Prep = Assembly × prep ratio (default 0.25, adjustable in Advanced Options)
Painting = Assembly × paint ratio × scheme factor (paint ratio default 0.40, adjustable)
Weathering = Assembly × 0.2 for High/Competition detail, otherwise × 0.1
Total = Assembly + Prep + Painting + Weathering

The multipliers are effort weightings, not literal scale ratios — a larger scale has more surface to clean up, paint and detail, so it is weighted higher. These are bench heuristics for planning, not a physical formula; your own pace will vary.

Frequently Asked Questions

Related Calculators

Parts Count Estimator

Estimate total parts count for a kit based on scale, subject type and complexity.

Glue Amount Calculator

Calculate how much plastic cement or CA glue you need for your kit build.

Filler Calculator

Estimate putty or filler needed for seam lines, gaps and corrections.

Decal Calculator

Plan decal application with setting solution and softener quantities.

Rigging Calculator

Calculate rigging line lengths for biplanes, ships and other rigged models.

Last updated: February 2026

All calculations are estimates. Always verify quantities before purchasing materials.