Woodworking Calculators

Air-Dry Lumber Time Calculator

Estimate how long green lumber needs to air dry to reach a usable moisture content. Based on species, board thickness, and drying location.

Deck Board Count Calculator

Calculate how many deck boards you need for a given area with your chosen board width and gap spacing. Includes waste factor and linear footage total.

Dowel Joint Size Calculator

Find the right dowel diameter, length, and hole depth for any wood joint based on stock thickness. Includes spacing recommendations and glue clearance.

Stair Riser and Tread Calculator

Calculate stair step count, riser height, and tread depth from total rise and run. Checks against IRC building code limits for safe, comfortable stairs.

Wood Janka Hardness Comparison Calculator

Compare Janka hardness of common woods for flooring, furniture, and tools. Find dent resistance scores from balsa to ipe and rank picks for your project.

Shelf Bracket Spacing Calculator

Calculate correct bracket spacing from shelf material, thickness, depth, and load. Prevent shelf sagging with the right bracket placement.

Box Joint (Finger Joint) Spacing Calculator

Calculate the number of pins and spaces for a box joint given board width and desired pin size. Get exact spacing for a perfect fit.

Cabinet Door Size Calculator

Calculate the correct cabinet door width and height for face-frame and frameless cabinets with full overlay, partial overlay, or inset door styles.

Wood Finish Coats and Coverage Calculator

Calculate how many coats of finish you need, how much product to buy, and total dry time for polyurethane, lacquer, oil, wax, and other wood finishes.

Wood Screw Pilot Hole Size Calculator

Find the correct pilot hole drill bit size for any wood screw gauge and wood hardness to prevent splitting and ensure a strong joint.

Dado Width and Depth Calculator

Calculate dado joint dimensions for shelves, drawer sides, and cabinets. Find optimal dado width, depth, and router bit setup for a perfect shelf fit.

Pocket Hole Spacing Calculator

Calculate pocket hole spacing, screw count, and screw length for any joint. Find the right setup for face frames, cabinet carcasses, and furniture.

Shelf Load Capacity Calculator

Calculate the maximum safe load for a shelf based on material, width, and span between supports. Get recommended weight limits with safety margin.

Wood Glue Coverage Calculator

Estimate how much wood glue you need for any number of joints. Select glue type and joint dimensions to get ounces, ml, and bottle count.

Wood Stain Quantity Calculator

Calculate how many quarts or gallons of wood stain you need for any project. Select wood species and number of coats for an accurate estimate.

Board Foot Calculator

Calculate board feet of lumber from thickness, width, and length. Price your wood purchases accurately for any woodworking project.

Dovetail Angle Calculator

Calculate the correct dovetail angle for your wood species. Get the ideal slope ratio for hand-cut dovetail joints in hardwood and softwood.

Dovetail Spacing Calculator

Calculate even dovetail tail and pin spacing for any board width and number of tails. Get consistent, beautiful hand-cut dovetail joints.

Mortise and Tenon Joint Calculator

Calculate correct mortise and tenon dimensions for strong woodworking joints. Get tenon thickness, width, and length from your stock dimensions.

Router Bit Speed Calculator

Calculate the correct RPM for your router bit diameter. Running router bits too fast is dangerous — find the safe speed for every bit size.

Wood Finish Coverage Calculator

Calculate how much wood finish, stain, varnish, or oil you need for any project. Avoid running out mid-coat or buying too much.

Wood Lathe Speed Calculator

Calculate optimal lathe RPM for your workpiece diameter. Get safe and efficient lathe speeds for turning wood bowls, spindles, and blanks.

Wood Movement Calculator

Calculate how much wood will expand or contract seasonally. Essential for furniture makers, flooring installers, and cabinetmakers.