Woodworking Calculator Dead On

The only calculator app with dovetail spacing, box joints, and wood movement. Fractions are native. No subscription.

Dead On is the woodworking calculator that thinks like a woodworker.

FRACTION CALCULATOR Mixed fractions are first-class. Type 5-3/4 + 2-1/8 and get an instant answer in fractions — chain math with parentheses, down to 1/32. No decimal conversion, ever.

VOICE INPUT Hands full of sawdust? Tap the mic and say "five and three quarters plus two and an eighth." Dead On writes 5-3/4 + 2-1/8.

SHOP MODE Step-by-step cut guidance in giant shop-floor type. It reads each step and listens for "next" — eyes on the blade, not the phone.

18 TOOLS BUILT FOR THE SHOP • Board feet with cost — know the bill before the register • Lumber yield with waste factor • Cut list optimizer and glue-up panels • Miter and compound angles with live diagrams • Dovetails, box joints, dados, mortise & tenon • Shelf sag, drawer slides, pilot holes, taper, epoxy pour, wood weight, wood EMC

JOINERY WITH LAYOUT MARKS The only woodworking app with built-in joinery math — and the diagrams are drawn from your numbers, with layout marks you can transfer straight to the board.

WOOD MOVEMENT Select from 30 wood species and calculate seasonal dimensional change from USDA data. Know exactly how much your tabletop will move, and how much gap to leave.

PROJECT ORGANIZATION Save calculations to projects. Your blanket chest keeps its board feet, dovetail spacing, and wood movement in one place — with seasonal movement reminders and iCloud sync.

BUILT FOR WOODWORKERS • Fraction-native input and display • Imperial and metric support • 30-species North American wood database • Apple Watch companion with a Digital Crown running total • No subscription — pay once, own it forever • No ads, no account required, and nothing sold to data brokers

Measure twice. Calculate once.