Chalk: Construction Calculator

Type feet, inches and fractions the way you say them. Chalk's keypad takes 5 ft 3 1/2 in on one line, with one-tap fraction keys for 1/2, 1/4, 1/8 and 1/16, and answers in feet, inches and fractions. No decimal-feet guesswork and no converting in your head.

Add, subtract, multiply and divide measurements on the tape calculator, then let Chalk do the job math. Every result rounds to the fraction precision you pick, down to 1/64 of an inch.

THE TOOLBOX
• Stairs: risers, treads, stringer length, angle and a code check
• Rafters and Roof: common and hip or valley lengths from span and pitch
• Concrete: slabs, footings and post holes, with bag counts
• Framing and Studs: stud counts and plate lineal for any wall
• Drywall: sheets, screws, compound and tape
• Tiling: tiles, adhesive and grout, waste included
• Brick and Block: US, UK and AU sizes, plus mortar
• Decking: board rows, lineal length and fasteners
• Board Feet: lumber volume and cost
• Equal Spacing and Balusters: even layouts that meet code
• Aggregates: gravel, sand, soil and asphalt by volume and weight
• Running Measurements: layout tables from a start point and interval
• Chalk Pad: a full-size dimensional calculator with memory and rise, run, pitch, diagonal, hip, jack and stair keys
• Free tools: tape calculator, triangle solver, square footage and volume, pitch and slope, square check and a unit converter

METRIC WHEN YOU NEED IT
Working from a metric plan? Switch to millimeters and meters in Settings. Every result shows both systems, and one entry can even mix units.

ASK THE ADVISOR
Chalk's AI Advisor talks the job through: quantities, materials, layout and sequencing. Attach a saved project and it works with your exact numbers. The Advisor needs a connection. Every calculator works offline.

BUILT FOR THE JOB SITE
• Works fully offline, with no account and no ads
• A clear diagram on every calculator
• Saved projects keep every number with the job it belongs to
• Light, Dark or System appearance
• Big results you can read in the sun

MADE FOR
Carpenters, framers, contractors, builders, concrete crews, remodelers and serious DIYers.

Chalk Pro unlocks every trade calculator, the Chalk Pad, the AI Advisor and saved projects. Weekly and yearly subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Results are estimates, so always check quantities before ordering.

Privacy Policy: https://chalkcalc.com/privacy
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Terms and Conditions: https://chalkcalc.com/terms
Support: support@chalkcalc.com