StructCalc - Construction Calc
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About this app
StructCalc is a professional construction calculator built by a carpenter. It handles rafter calculations, stair design, baluster spacing, right-angle verification, and on-site dimensional math — all in one free app.
Calculator Tools
Rafter & Roof Framing
Calculate common rafters, hip rafters, and roof angles instantly. Enter pitch, run, or rise, and get rafter lengths, plumb cuts, seat cuts, and material quantities. No more pencil-and-paper trig on the jobsite.
Stair Design
Design safe, well-designed stairs from a single input — total rise. StructCalc calculates tread count, riser height, stringer length, and headroom automatically.
Baluster Spacing
Calculate equal baluster spacing for railings, fences, and decks. Adjust spacing and post positions until the layout looks right.
Square Check (Pythagorean Theorem)
Verify right angles for foundations, walls, and framing layouts. Enter any two sides of a triangle and get the third instantly — with a real-time diagram that updates as you type.
Dimensional Calculator
A full feet-inch-fraction calculator for experienced builders. Add, subtract, multiply, and divide in imperial or metric without converting to decimals. Trigonometry mode handles sine, cosine, and tangent for any angle.
Measurement Series
Run cumulative measurements for long layouts — foundation footings, wall plates, deck joists. No need to keep a running total in your head.
Project Management
Group your calculations into real projects with material estimates, notes, and status tracking. Create material profiles with unit prices and reuse them across jobs. Quick-export material lists for procurement.
Features
- Works in Metric (mm, cm, m) and Imperial (feet, inches, fractions)
- Dark mode and light mode — follows system setting or manual override
- Free to use with optional premium upgrade for unlimited project storage
- Real-time visual diagrams for stairs, rafters, and right triangles
- Calculation history with searchable logs
- Material catalog with user-defined profiles and suppliers
Who Is StructCalc For?
- Carpenters and framers
- General contractors and builders
- Roofers and siding installers
- Deck and fence builders
- DIY homeowners and hobbyists
- Architects and designers
Why Choose StructCalc?
- Fast. Instant results. No manual math.
- Accurate. Built for real jobsite tolerances.
- Free. Professional features without a subscription.
- Offline. Works anywhere — no internet connection required.
- Clean. Modern interface that doesn't get in your way.
---
Built by a carpenter. For every builder.
Download StructCalc free today.
Calculator Tools
Rafter & Roof Framing
Calculate common rafters, hip rafters, and roof angles instantly. Enter pitch, run, or rise, and get rafter lengths, plumb cuts, seat cuts, and material quantities. No more pencil-and-paper trig on the jobsite.
Stair Design
Design safe, well-designed stairs from a single input — total rise. StructCalc calculates tread count, riser height, stringer length, and headroom automatically.
Baluster Spacing
Calculate equal baluster spacing for railings, fences, and decks. Adjust spacing and post positions until the layout looks right.
Square Check (Pythagorean Theorem)
Verify right angles for foundations, walls, and framing layouts. Enter any two sides of a triangle and get the third instantly — with a real-time diagram that updates as you type.
Dimensional Calculator
A full feet-inch-fraction calculator for experienced builders. Add, subtract, multiply, and divide in imperial or metric without converting to decimals. Trigonometry mode handles sine, cosine, and tangent for any angle.
Measurement Series
Run cumulative measurements for long layouts — foundation footings, wall plates, deck joists. No need to keep a running total in your head.
Project Management
Group your calculations into real projects with material estimates, notes, and status tracking. Create material profiles with unit prices and reuse them across jobs. Quick-export material lists for procurement.
Features
- Works in Metric (mm, cm, m) and Imperial (feet, inches, fractions)
- Dark mode and light mode — follows system setting or manual override
- Free to use with optional premium upgrade for unlimited project storage
- Real-time visual diagrams for stairs, rafters, and right triangles
- Calculation history with searchable logs
- Material catalog with user-defined profiles and suppliers
Who Is StructCalc For?
- Carpenters and framers
- General contractors and builders
- Roofers and siding installers
- Deck and fence builders
- DIY homeowners and hobbyists
- Architects and designers
Why Choose StructCalc?
- Fast. Instant results. No manual math.
- Accurate. Built for real jobsite tolerances.
- Free. Professional features without a subscription.
- Offline. Works anywhere — no internet connection required.
- Clean. Modern interface that doesn't get in your way.
---
Built by a carpenter. For every builder.
Download StructCalc free today.
Professional construction calculator for rafters, stairs, & more. Free to use.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- No data shared with third partiesLearn more about how developers declare sharing
- This app may collect these data typesPersonal info, Financial info, and Device or other IDs
- Data is encrypted in transit
- Data can’t be deleted
What’s new
Release:
- Various bugfixes and improvements
- Removed Projects feature
- Added history feature
- Added more calculators
- Various bugfixes and improvements
- Removed Projects feature
- Added history feature
- Added more calculators
App support
About the developer
Henrik Halvorsen
henhalvor.dev@gmail.com
Midtunlia 31C
5224 Nesttun
Norway