HTBI Building Tools
Free interactive tools to help you manage parts lists, solve building challenges, plan dimensions, explore connections, create mosaics, find instructions, reduce building costs and design more accurately.
Parts List Manager
Create, import, edit and compare parts lists, estimate prices, find cheaper alternatives and export updated lists for your builds.
Parts Connection Library
Discover creative ways to connect building parts. Search by part number, name or multiple parts and explore visual connection techniques for your builds.
Build for Less
Explore cheaper part alternatives for existing sets and discover ways to reduce the estimated cost of a build.
Building Instructions
Search for building sets and quickly find their instructions in one simple and easy-to-use tool.
Photo Mosaic
Turn a photo into a brick mosaic, customize the result and generate a complete parts list and building guide.
Recolor Build
Explore different color palettes for existing builds and generate a parts guide for recreating them in a new color scheme.
Size Calculator
Convert studs, plates and bricks into real-world dimensions. Estimate model dimensions or work backwards from a target size.
Visual Diagonal & Angle Explorer
Explore diagonal placements on a stud-based grid, find supported connection points and understand the angles between different positions.
Circle & Arc Calculator
Plan circular and curved builds, explore circles and arcs and find practical dimensions for supported building techniques.
SNOT & Offset Calculator
Calculate offsets and compare dimensions in different building directions to find clean, physically compatible alignments.