Construction Calculator - Dado

Dado is a construction calculator that works in feet, inches and fractions, the way your tape measure does.

Type 7' 5 3/8" and add, subtract, multiply or divide. Dado keeps the fraction, carries inches into feet, and shows the exact value behind a rounded result when you tap it.

A FEET AND INCHES CALCULATOR
• Feet, inches and fractions down to 1/64, with one-tap fractions above the keys
• Square and cubic units for square footage and volume
• Every result in feet-inches, decimal feet, inches, yards, meters, centimeters and millimeters
• A running tape of every line, with memory and trig functions
• Large keys you can hit with gloves on

21 SOLVERS
Enter what you know. The answer updates as you type, next to a labeled drawing of the layout.
• Layout: right triangle, square-up by the diagonal, studs on center, rake wall
• Roof: common rafter, hip and valley, jack rafters, roofing squares and bundles
• Stairs and rails: risers, treads, stringer and stairwell opening, balusters, fence
• Cuts and shapes: miter and compound miter, arc, polygon
• Materials: area and volume, drywall, masonry, concrete by the yard or by the bag, board feet, cost, weight

MADE FOR THE JOB SITE
• Works offline: every calculation runs on your phone
• Your own defaults for spacing, stock sizes, sheet sizes and bag sizes
• Saw or protractor angles, imperial or metric first
• English and Spanish
• iPhone Duo: drawing, results and inputs side by side on the inner display

SAVE AND SHARE
Label a result to keep it, send it as text, or share a one-page PDF with the drawing.

NO ACCOUNT
Dado has no sign-up. Your calculations stay on your device.

DADO PRO
The calculator, unit conversion, the tape and three solvers (right triangle, square-up, area and volume) are included. Pro unlocks:
• Every other solver
• Saved results and PDF sharing
• Blueprint, Daylight and Night themes. Daylight is the easiest to read in full sun

Pro is available as a monthly or yearly auto-renewing subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel it in your App Store account settings.

Terms of Use: https://www.nativelabs.lt/dado/terms
Privacy Policy: https://www.nativelabs.lt/dado/privacy-policy

IMPORTANT
Dado is a calculation aid, not engineering advice. Results depend on the values you enter. Verify measurements before you cut, and check stairs, guards and structural work against the building code where you build.