About ModelCalcs
ModelCalcs provides 109+ free calculators across 12 categories, built specifically for scale modellers, railway enthusiasts, RC builders, wargamers and diorama artists. Every tool is fast, accurate, and requires no signup or account.
Whether you need to convert a real-world measurement to 1:72 scale, calculate the correct paint thinning ratio for your airbrush, plan a model railway gradient, size an RC battery, or estimate the cost of your next wargaming army, ModelCalcs has a purpose-built calculator for the job.
Browse by Category
- ð Scale Conversion: 11 calculators
- ðĻ Paint & Finishing: 16 calculators
- ðĐïļ Plastic Kits: 11 calculators
- ð Railway Modelling: 12 calculators
- ðïļ RC Models: 10 calculators
- ð Diorama: 10 calculators
- âïļ Miniatures & Wargaming: 12 calculators
- ðĻ Scratch Building: 8 calculators
- ð ïļ Tools & Equipment: 8 calculators
- ð Model Maths: 9 calculators
- ðŠķ Rigging & Detail: 1 calculators
- ð Track & Scenery: 1 calculators
- ð Reference: 4 guides
Our Commitment
- 1.Always free â no signup, no paywall, no limits.
- 2.Accurate formulas â based on established scale modelling principles and correct mathematics.
- 3.Works everywhere â phone, tablet, desktop. No app to install.
- 4.No tracking â we use minimal analytics. Your data stays on your device.