Free Scale Modelling Calculators
Free calculators for scale modellers, railway enthusiasts, RC builders, wargamers and diorama artists. Fast, accurate, no signup required.
Scale Conversion
Convert real-world measurements to any model scale and back. Compare scales, calculate speed, weight, area and volume at scale.
10 calculators â
Paint & Finishing
Mix paints accurately, calculate thinning ratios, airbrush settings, spray coverage and weathering quantities for perfect model finishes.
10 calculators â
Plastic Kits
Plan your plastic kit builds with calculators for glue, filler, decals, rigging, photo-etch and build time estimation.
8 calculators â
Railway Modelling
Essential calculators for model railway layouts â track, curves, gradients, platforms, bridges, signals and baseboards.
10 calculators â
RC Models
Radio-controlled model calculators for batteries, motors, ESCs, gearing, servos, wing loading, propellers and flight time.
8 calculators â
Diorama
Plan dioramas with calculators for base sizing, terrain, vegetation, water effects, lighting, figure placement and materials.
8 calculators â
Miniatures & Wargaming
Wargaming calculators for army points, paint pots, basing, movement trays, dice odds, range rulers and army costs.
8 calculators â
Scratch Building
Calculators for scratch builders â sheet thickness, rod and tube sizing, templates, structural strength, rivets and panel lines.
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Tools & Equipment
Find the right tools â drill bit sizes, blade selection, magnification power, lighting setups, cutting mats and compressor settings.
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Model Maths
Planning and budgeting calculators â material costs, build time, collection value, display cases, shipping and competition scoring.
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ModelCalcs â Free Scale Modelling Calculators
ModelCalcs provides 86+ free calculators built specifically for scale modellers, railway enthusiasts, RC builders, wargamers and diorama artists. Convert measurements across all common scales from 1:6 to 1:700, mix paints to precise ratios, plan track layouts, size batteries and motors, and estimate material quantities â all without signup.
Whether you are building a 1:72 aircraft kit, laying OO gauge track, scratch-building a structure from styrene sheet, or painting a Warhammer army, our calculators handle the maths so you can focus on the hobby. Every tool gives instant results with clear breakdowns you can copy and share.
Browse all 86+ calculators or search above to find exactly what you need.