Construction Calculator: Tools

Feet Inches, Stairs & Framing

Free · Designed for iPad. Not verified for macOS.

Master construction & carpentry math in seconds. Calculate feet-inch fractions, stair stringers, rafter cuts & concrete takeoffs offline. Download ProBuilder now! Construction Calculator Pro is the ultimate professional construction, carpentry, and civil engineering calculator—built specifically for general contractors, framers, finish carpenters, masonry builders, and estimators. Engineered to replace bulky handheld jobsite calculators, Construction Calculator Pro puts tactile, sunlight-readable precision right in your pocket. It works 100% offline with zero account requirements, zero cloud dependencies, and zero monthly subscriptions. ► FRACTIONAL DIMENSIONAL MATH • Add, subtract, multiply, and divide feet, inches, fractions (down to 1/64"), yards, meters, centimeters, and millimeters. • Instant unit conversions across imperial and metric dimensions with a single tap. • Visual 0–15 fraction picker for lightning-fast entry without decimal typing errors. • Continuous paperless history tape with labeled annotations. ► STAIR STRINGER & RAFTER LAYOUT (WITH CODE CHECKS) • Stair Layout: Calculate total rise, run, number of risers/treads, stringer throat cuts, and incline angle. • Built-in IRC / IBC code validation instantly flags non-compliant riser heights or tread depths. • Rafter Cuts: Calculate common rafters, hips, valleys, jacks, ridge deductions, and birdsmouth seat/plumb cuts with real-time 2D CAD diagrams. ► RUNNING TAPE & BALUSTER SPACING • Mark framing studs, joists, and baluster center-to-center layouts in a single continuous pass. • Built-in 4-inch sphere safety check ensures railings meet building code standards. ► CUT LIST & BOARD OPTIMIZER • First-Fit Decreasing (FFD) 1D bin packing optimizer minimizes scrap and lumber costs. • Automatically factors in saw blade kerf thickness so your physical cuts match your calculations. ► CIVIL & STRUCTURAL TAKEOFFS • Concrete Estimator: Slabs, footings, round columns, and curbs with custom waste factors. • Drywall & Sheathing: Sheet counts, joint compound, and screw estimates. • Brick & Block Masonry: Modular brick and CMU block counts with mortar volume. • Concrete Mix Proportions: Cement, sand, aggregate, and water weights for nominal mixes. • Rebar BBS (Bar Bending Schedule): Total length, weight, and cutting lists. • RCC Structural Elements: Beams, columns, and slabs. • Earthwork & Excavation: Trench, pit, and swimming pool volume estimations. ► INTERNATIONAL BUILDING CODES (195+ COUNTRIES) • Select your jurisdiction to automatically apply local stair rise/tread rules, baluster maximums, and safety guard regulations. ► PRIVACY & TRANSPARENCY • 100% Offline: Calculates entirely on your device. • Zero Data Collection: No tracking, no user accounts, nothing sent to external servers. • Fair Pricing: Free with non-intrusive banner ads that never block your keypad. Optional one-time $9.99 purchase removes all ads forever—no subscriptions. Support & Privacy Policy: https://chronos-labs.tech

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The developer, Inkal Vadodariya, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Inkal Vadodariya
Size
28.3 MB
Category
Utilities
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPad
    Requires iPadOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
Copyright
© 2026 Chronos Labs
  • Developer Website
  • Privacy Policy

    • More by Inkal Vadodariya

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