Construction Calculator: Pro²

Pro construction calculator for deck, roof, stairs and concrete. Fast, accurate layouts with metric & imperial units, smart defaults and offline support. For the jobsite.

Build faster, measure smarter. Pro² is a complete construction calculator for decking, roofing, concrete, stairs, framing and precise on-site measurements. It’s made for builders, carpenters, contractors and serious DIY who need accurate answers in seconds.

DECKING & FLOORING • Area, board runs, spacing and waste allowance
• Material takeoff for boards and joists

ROOFING (METAL & TILE) • Coverage and sheet/tile counts
• Overhangs, pitch, angle and rafter length helpers

STAIRS & STRINGERS • Rise/run, slope %, angle (°) and stringer length
• Clear breakdowns and step-by-step visuals

BALUSTERS, RAILING & EVEN SPACING • Perfect marks from 0 to full length
• Spacing tables for clean, consistent layouts

CONCRETE, ASPHALT, GRAVEL & SOIL • Volume estimators for slabs, pads, footings and fills
• Smart rounding for real-world quantities

SLOPE, PITCH & ANGLES • Fast framing helpers for cuts and layout
• Metric and imperial support in every tool

UNIT CONVERTER • Length, area, volume, density and weight
• Built for mixed-unit jobs (mm, ft, inches)

QUICK CALCULATOR • Running history with one-tap copy/share

MADE FOR THE JOBSITE • Fraction support and practical defaults
• Works fully offline—no signal required
• Clean visuals that stay readable outdoors

WHY PROS USE PRO² • One app instead of juggling multiple separate tools
• Accurate results, simple inputs and clear diagrams
• New tools and improvements arrive regularly based on user feedback

Pro² is built for professional construction, carpentry, decking, roofing and framing work—yet intuitive enough for DIY home projects. Upgrade to unlock additional tools and advanced features when you’re ready to grow your toolkit.

SUBSCRIPTION TERMS • Carpenter Pro is an optional auto-renewing subscription with Weekly and Annual plans. • A 3-day free trial is available on the Annual plan. • Payment is charged to your Apple ID and subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. • You can manage or cancel your subscription in your App Store account settings. • Lifetime is a one-time purchase and does not auto-renew. • The localized price is shown in-app before you confirm.

Terms of Use (Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shapkin.dev/apps/carpenter/privacy.html