Bad Owl Tool: Woodworking

Bad Owl Tool

About this app

Meet your new woodshop wingman.

Bad Owl Tool is the definitive digital woodworking toolkit for the modern craftsman. Whether you’re a hobbyist or running a cabinet shop, it replaces scrap paper math and clunky apps with a single, pro-grade utility set built for carpentry, cabinetry, and fine woodworking.

Stop ruining expensive lumber with bad mental math. Enjoy zero distractions—just a comprehensive, no-BS digital toolkit that makes your workflow easier, faster, and more accurate.

🧰 THE ULTIMATE WOODWORKER'S TOOLKIT

🦉 BIRDBRAIN AI FOREMAN: Meet your AI woodshop assistant. Get uncompromising advice, generate project blueprints, track orders, and search the Bad Owl shop directly from the bench.

💧 EMC & MOISTURE TRACKER: Calculate Equilibrium Moisture Content using 14-day local weather forecasts or historical annual averages. Track individual boards, log readings, and view moisture trends to ensure your lumber is perfectly acclimated.

🪵 WOOD MOVEMENT CALCULATOR: Predict seasonal expansion and shrinkage based on USDA Wood Handbook formulas. Input your wood species, grain orientation, and dimensions to generate a "Shop Action Plan" that details the exact expansion gap or groove depth your project needs.

📐 TRIANGLE & ANGLE CALCULATOR: Take the guesswork out of shop geometry. Toggle Side-Angle-Side and Angle-Side-Angle modes to calculate missing angles, and verify layouts with automatic right-angle markers.

🍩 SEGMENTED TURNING: Plan flawless bowls and intricate geometric patterns. Calculate cut angles, segment lengths, and ring diameters. Configure custom alternating ratios and stock allowances.

🖼️ ARTISTIC RATIOS: Perfect your furniture proportions. Calculate the Golden Ratio, Rule of Thirds, and custom dimensions. Visualize Dynamic Symmetry, Fibonacci, Root Rectangles, and the Pareto Principle.

📏 BOARD FOOT CALCULATOR: Calculate board feet, estimate lumber costs, explore wood species properties, and determine project weights.

💧 EPOXY CALCULATOR: Calculate the exact epoxy resin needed for river tables or fills to avoid running out mid-pour.

⚗️ APOTHECARY: Explore a curated library of traditional woodshop recipes. Learn to mix shellac, hide glue, and natural stains with safety guides.

🎯 PRECISION LEVELS: Turn your phone into an accurate level featuring bullseye/linear modes, surface calibration, and custom zero baselines.

📏 FRACTIONS & CONVERTER: A full-featured fraction calculator that also instantly converts a decimal to an exact, tape-measure-ready fraction.

🧴 GLUE FINDER: Compare PVA, hide, and CA adhesives by open time and water resistance.

🪚 BANDSAW RADIUS: Calculate minimum cutting radius or enter a target curve to find the perfect blade. Filter by width, TPI, kerf, and material.

🪛 TAP & DRILL GUIDE: Find exact drill bit sizes for any tap or screw. Get pilot hole recommendations, clearance sizing, and reverse bit lookups.

🖌️ FINISH ESTIMATOR: Calculate coverage area based on your specific finish to avoid running out mid-coat.

⚖️ SHOP MATH CONVERTER: Quickly convert length, area, volume, and weight. Features multi-input fields and fractional inch readouts.

🦉 BUILT BY WOODWORKERS
We know what it’s like to hunt for a drill chart or guess finish coverage. The Bad Owl Tool app was built by our family-run woodworking supply business to be a trustworthy digital companion at your bench. Customize your app settings to fit your workflow: toggle dark mode, or choose imperial or metric systems.

🔓 UNRESTRICTED ACCESS
We built this as an open, unrestricted digital resource—no paywalls, hidden fees, or subscriptions. The app is fully supported by our online shop. Every time you purchase woodworking supplies from us, you help keep these tools accessible for everyone.

Download the Bad Owl Tool app today and put the sharpest tool in the shop right in your pocket.

Ratings and reviews

I like concept and very handy tools, especially the level and measurement converters. It’s definitely worth having on your phone if you work with wood and if you want to compare some prices. The AI Owl is something that I need to play more.

just downloaded this for the shop and its exactly what i needed. the board foot calc is crazy helpful because u actually pick the wood species right in the app. it does the math to give u the total weight of the lumber so u know what your dealing with before u even start building. straight to the point and no bs.

Developer disclosure: I built Bad Owl Tool. I’m a woodworker who got tired of stopping mid-project to hunt down formulas, charts, and calculators — so I built the tool I wanted on my own bench. It’s designed around real shop workflows: lumber math, drill sizes, angles, epoxy, finishes, bandsaw limits, turning, layouts, and more. It’s free, and I’m always adding improvements. Feedback and tool ideas are welcome — if there’s something you’d like to see added, I’d love to hear it!