For Woodworkers Who Measure Twice

Workshop Calculations.
Instantly Accurate.

The essential calculator app for woodworkers who demand precision. Board feet, fractions, drill bits - everything you need, right in your pocket.

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Woodworker's Toolbox home screen showing all 11 tools
4.9 Rating
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Powerful Tools

Everything You Need,
Nothing You Don't

11 precision tools built for the way woodworkers actually work — now with full imperial and metric support throughout. Calculators, references, species data, and conversions: fast, accurate, and always ready.

Lumber Calculator

Calculate lumber volumes instantly. Perfect for estimating material costs and ordering the right amount.

  • Instant volume calculations
  • Imperial & metric support
  • Perfect for ordering lumber

Fraction Calculator

Work with fractions the way you think. Add, subtract, multiply - get results you can actually use.

  • All arithmetic operations
  • Automatic simplification
  • Decimal conversion

Drill Bit Finder

Find the right bit size instantly. Quick reference for pilot holes, clearance holes, and countersinks.

  • Comprehensive size guide
  • Quick search & filter
  • Workshop-optimized

Drill Index

The complete reference for all standard drill sizes. Fractional, wire gauge, and letter series in one searchable list.

  • 150+ sizes across all series
  • Filter by fractional, gauge, or letter
  • Decimal & mm conversions included

Pilot Hole & Screw Guide

Stop guessing drill sizes. Covers wood screws, construction screws, and trim fasteners with complete specifications.

  • Wood, construction & trim families
  • Pilot, clearance & countersink sizes
  • Softwood & hardwood settings

Unit Converter

Bridge metric and imperial without mental math. Ideal for CNC users working between software dimensions and bench measurements.

  • mm → nearest imperial fraction
  • Accepts decimal, fraction & mixed numbers
  • Quick-reference table of 20 common conversions

Janka Hardness Chart

Compare wood hardness ratings at a glance. Essential for choosing the right species for flooring, furniture, and high-wear surfaces.

  • Janka ratings for common species
  • lbf & N ratings included
  • Sorted from softest to hardest

Wood Movement Calculator

Predict how much a board will expand or contract as moisture content changes. Plan for seasonal movement before it ruins a project.

  • Species-specific movement coefficients
  • Flat, rift & quartersawn grain
  • Built-in species presets

Wood Species Database

A quick-reference library of 280 wood species with key properties. Look up workability, hardness, and movement characteristics in one place.

  • 280 species — hardwoods & softwoods
  • Filter by region — N. America, Europe, Africa, Asia
  • Links directly to movement calculator

Shrinkage Chart

Reference shrinkage values by species and grain orientation. Know how much a board will shrink from green to dry before you mill it.

  • Radial & tangential values
  • T/R ratio for stability comparison
  • Common North American species

Pocket Hole Guide

Dial in pocket-hole joinery every time. Get the right drill-guide depth, screw length, and clamp setting for your exact material and thickness.

  • Softwood, plywood, hardwood & MDF presets
  • Drill depth, screw length & jig setting
  • Works in inches or millimeters

See It In Action

Designed for the Workshop

Clean interfaces that work with dusty fingers. Big buttons, clear results, zero confusion.

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Made For You

Built for Real Woodworkers

Whether you're building heirloom furniture or your first birdhouse, we've got you covered.

Furniture Makers

Precision for custom pieces

Carpenters

Quick calcs on the job site

DIY Enthusiasts

Perfect for home projects

Students

Learn with accurate tools

What People Say

Loved by Woodworkers

"Love this App. It functions well and makes quick work of figuring out how much wood I need. Allows for easy calculations while I am working on a project."

M

Msdeedz

★★★★★ App Store Review

Get Started Today

Ready to Work Smarter?

The essential toolkit for woodworkers who demand accuracy. Buy once, use forever.

One-Time Purchase

$9.99

No subscriptions

No in-app purchases

Free updates included

Download on the App Store

Requires iOS 18.0 or later

Get the App - $9.99