# CutOnce - Builder's Calculator — Stairs, Rafters & Fractions

> Jobsite calculator for contractors with feet-inch-fraction math and PDF plan generation. (iPhone/iPad app by Verik Labs LLC.)

- Source: https://appshunter.io/ios/app/cutonce-builders-calculator/id6761668958 (this page in markdown: same URL + `.md`)
- Developer: [Verik Labs LLC](https://appshunter.io/developer/1890748691)
- Category: Utilities, Productivity
- Price: Free with in-app purchases (on sale, was $19.99)
- Rating: 5.00/5 from 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 13 MB
- Languages: American English
- Released: 2026-04-08
- Data updated: 2026-08-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cutonce-builders-calculator/id6761668958/reviews.md

## What is CutOnce?

Stair and rafter PDF plans, generated offline, on your phone. Feet-inch-fraction math, roofing materials, concrete blocks and brick, crown moulding angles, footings, board feet, deck and concrete estimates, with optional material cost on every estimate: every jobsite calculation in one toolbox. Built for contractors, carpenters, and builders who need accurate answers in the units they actually use.

STAIR CALCULATOR
• Enter total rise and get a complete stair layout
• Live, zoomable diagrams: elevation, stringer, detail, and balusters
• Unit rise, unit run, number of treads and risers
• Stringer dimensions and layout
• Export a detailed PDF with cut dimensions for the shop

RAFTER CALCULATOR
• Common rafters from span or run
• Ridge height, birdsmouth, and tail cuts
• HAP, overhang, and slope calculations
• PDF export with all the cut angles you need

HIP & VALLEY RAFTERS
• Hip and valley rafter lengths and angles
• Backing angles and cheek cuts
• King common and jack rafter spacing
• Full PDF export for the crew

OFFLINE PDF PLANS
• Shop-ready stair plans with every cut dimension
• Rafter plans with lengths, angles, and layout marks
• Print from the truck or share straight to the crew
• No signal, no cell service, no account required

FEET-INCH-FRACTION MATH
• Enter measurements naturally: 3' 5-3/16" + 2' 10-1/2"
• Add, subtract, multiply, and divide all in fractions
• Choose your precision: 1/2" through 1/64"
• Results displayed in feet-inches-fractions or inches-fractions

RIGHT ANGLE CALCULATOR
• Solve any right triangle from two known sides
• Enter in feet-inches-fractions, get results the same way
• Find the diagonal, rise, or run instantly
• Perfect for squaring walls, checking layouts, and cutting braces

ROOFING MATERIALS
• Shingle bundles and squares from roof area or measured surface
• Sheathing sheets, underlayment rolls, and ridge cap coverage
• Drip edge as lapped sticks with your own lap allowance
• Live roof diagram in Area mode and a shop-ready PDF takeoff

CONCRETE BLOCKS & BRICK (MASONRY)
• Block and brick counts with a fractional course layout
• Mortar yield by product and a CMU width selector (4"–12")
• Optional grout, rebar, bond-beam steel, and wall weight
• Tape and PDF with rebar spacing and openings accounted for

CROWN MOULDING / COMPOUND MITER
• Saw miter and bevel angles for crown on a compound-miter saw
• Nested (in-position) cutting mode for tight spots
• Pop-out angle diagram and a PDF you can take to the saw

CONCRETE FOOTINGS
• Pad and strip footing volume with bag or ready-mix takeoff
• Reinforcement assumptions surfaced (cover inset and lap)

COST ESTIMATING
• A Total Cost calculator to price out a whole job
• Optional price rows on Concrete Bags, Paint, Drywall, Deck, Board Feet, Masonry, Rake Wall, and Roofing
• Material cost prints right on the tape and the PDF

BUILT FOR THE JOBSITE
• Every calculator one tap away in the CutOnce Toolbox
• Free 7-day trial of every advanced calculator. Basic calculator always free.
• One-time purchase to unlock. No subscriptions. No ads.
• Free updates included
• Works on iPad and iPhone
• English and Spanish language included

Whether you're framing walls, cutting stringers, laying out rafters, ordering roofing and block, or squaring foundations, CutOnce gives you accurate answers in the units you actually use.

## Key features

- Stair and rafter PDF plan generation
- Offline jobsite calculations
- Feet-inch-fraction math
- Right angle triangle solver
- Board feet and concrete estimates
- Live, zoomable diagrams

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| CutOnce Full Access | $19.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/cutonce-builders-calculator/id6761668958/reviews.md

### 5/5 — Made me feel like a pro

*2026-04-08*

I built a deck in my backyard and CutOnce figured out how much lumber I needed, calculated my stair rise and run, and even told me how many concrete bags for the footings. I didn’t search for formulas or hope I got the math right. Everything just worked in the units I was buying at the store.

## Frequently asked questions about CutOnce

### Does CutOnce have ads?

No, CutOnce is ad-free. The app explicitly states it contains no advertisements, allowing for an uninterrupted user experience.

### What is the pricing for CutOnce?

CutOnce offers a free basic calculator and a free 7-day trial for advanced features. A one-time purchase unlocks all advanced calculators permanently, with no subscriptions required.

### What devices does CutOnce support?

CutOnce is available for both iPhone and iPad, ensuring compatibility across Apple's mobile device ecosystem.

### How often is CutOnce updated?

The latest version, 1.7.0, was released on June 18, 2026, indicating regular updates. The app also guarantees free updates are included with the purchase.

### Can I use CutOnce without an internet connection?

Yes, CutOnce is designed for offline use. All calculations and PDF plan generation can be performed without a signal or cell service.

### What languages does CutOnce support?

CutOnce is available in both English and Spanish, catering to a broader range of users.

### What is the age rating for CutOnce?

CutOnce has an age rating of 4+, making it suitable for a wide audience, including younger users involved in educational or hobbyist building projects.

### How accurate are the calculations in CutOnce?

The app is built for contractors and builders who need accurate answers in the units they actually use, emphasizing precision in its feet-inch-fraction math and various jobsite calculations.

## Version history (last 5 releases)

### 1.12.0 — 2026-08-11

• Five memory registers. Store and recall up to five separate values with the new M1 through M5 keys, so you can hold a few running totals at once instead of just one.
• New trig calculator. A dedicated Trig mode handles sin, cos, and tan plus their inverses, with degree or degrees-minutes-seconds entry, and your work prints to the tape and PDF like every other calculator.
• Rake wall PDF. Export a rake wall as a dimensioned elevation with a full, paginated stud schedule you can hand to the crew or the yard.
• Clearer rake wall angles. Cards, tape, and PDF now spell out which angle is the pitch off square and which is the bevel from the stud's edge, and any value that had to be rounded is marked so you know when to trust the exact number.
• More accurate rafters. Ridge height now includes height above plate, ridge boards are sized from the real plumb-cut depth, board layout edges are corrected, and the lumber PDF now shows the length, spacing, and rafter-count assumptions behind the list.
• Cleaner keypad labels. Separator keys now read ft-in and a/b across every calculator, matching the main keypad.
• Your work is saved. If your phone closes the app to free up memory, CutOnce now brings back your inputs and results right where you left them.

### 1.11.0 — 2026-07-21

• Cleaner calculator layouts. Inputs in the Concrete, Masonry, Drywall, Paint, and Board Feet calculators are now grouped into clear, labeled sections, so it's easier to see what to enter and what the app gives back.
• Know which cards to tap. Every value card now shows a pencil when it's an input you can edit and an = when it's calculated for you, with a quick tip the first time you see them.
• A keypad you can feel. The number keypad now gives a light tap of feedback as you type. Turn it off anytime in Settings.
• One consistent Clear key. The Clear key now works the same on every calculator: AC to start over, or C to clear just your current entry.
• Better on tablets. Calculator layouts now sit centered on iPad and larger tablets instead of stretching edge to edge.
• Safer stair plans. When a staircase is too tall to build as a single flight under code, CutOnce now flags it and shows how to split it into flights with an intermediate landing, instead of printing a plan you can't build.
• Diagram and PDF fixes. Cleaned up overlapping labels on hip roof jack headers and on flush-mount deck stair callouts.

### 1.10.0 — 2026-07-15

• Stairs now check the building code as you work. A new compliance panel grades riser height, tread depth, stringer throat, and total rise against IRC R311.7 limits, with headroom, riser variance, and comfort guidance alongside. The same summary prints on your stair PDF.
• Your code, your values. The new Code Values section in Settings lets you review and override every code limit the app uses, in fractions, decimals, or metric, with a clear badge on anything you've changed and a one-tap reset per value.
• Pick your riser count. Tap any compliant riser option in the results, or flip the new Comfort / Riser-limited toggle to solve with the fewest code-legal risers.
• Flush (deck) mount done right. Stair plans now label which mount they assume, draw flush stringers with the correct layout and edge lengths, size the lumber purchase length from the actual cut, and spell out bearing and connector hardware.
• Sharper stair numbers everywhere. Every printed dimension now rounds exactly once, at your fraction setting, so the screen, tape, and PDF always agree; metric code checks compare exact values; and the stairwell opening accounts for floor assembly thickness and nosing.
• Keep the screen on while you calculate. A new setting, on by default, holds the display awake on any calculator screen so your phone won't dim mid-measurement while your hands are full. Turn it off anytime in Settings; battery saver and Low Power Mode still take over as usual.
• Cleaner hip roof PDFs. Jack labels and the roof width dimension no longer overlap on exported plans.

### 1.9.0 — 2026-07-07

• Four new calculators. Roofing Materials (shingles, bundles, squares, sheathing, underlayment, and drip edge), Concrete Blocks & Brick masonry (block and brick counts, mortar, course layout, and rebar/grout), Crown Moulding compound-miter (saw miter and bevel angles, with a nested in-position cutting mode), and Concrete Footings.
• Total Cost estimating, everywhere. A new Total Cost calculator plus optional price rows you can add to Concrete Bags, Paint, Drywall, Deck, Board Feet, Masonry, Rake Wall, and Roofing — your material cost prints right on the tape and PDF.
• Live diagrams on every calculator. Rafters, Arc, Deck, Rake Wall, Right Angle, and the new calculators now draw your work as you type, with cleaner, more legible labels across the board.
• Sharper output. Tape and PDF strings wrap instead of clipping at the page edge, help tips scroll when they're long, and the new calculators surface any missing inputs before you cut.
• New drywall sheet size. The Drywall calculator now includes the 4 x 9 ft US standard sheet, alongside 4 x 8, 4 x 10, 4 x 12, and 4 x 14.
• Clearer live diagrams everywhere. Labels no longer overlap, the figure fills the full width of the card, and each calculator now shows a branded illustration before you start typing. On phones the diagrams are right-sized so nothing clips.
• Roofing upgrades. Pitch now sits at the top of both Dimensions and Area modes, and on iPad you can pop the roof-plan diagram out into a larger sheet.
• Reordered Toolbox. Calculators are grouped high-value-first, so the tools you reach for most are up top.
• Sharper roof PDFs. Hip and Valley plans keep every angle label clear of the drawing, and the View PDF button appears only when your plan is ready to export.

### 1.7.0 — 2026-06-18

• More live diagrams. The Area/Volume calculator and the Right Angle solver now draw your shape as you type: rectangle, circle, cylinder, and right triangle, with the calculated area or volume shown right inside the figure. On iPad they fill the space beside the keypad.
• Decluttered Calculator keypad. The look-alike separators now read "ft-in" and "a/b", one smart Clear key shows AC or C as needed, and the memory keys tuck behind an "fx" toggle so the everyday pad stays clean.
• Faster start. A new "What are you building?" step drops you straight into Stairs or Rafters with a worked example instead of a blank screen.
• Tap the values you know. On the Right Angle solver, tap any two cards to enter what you know and CutOnce solves the rest.
• Cleaner results, fewer interruptions. Empty rafter cards stay hidden until they have a number.

## Related topics

[truss calculator](https://appshunter.io/ios/topics/truss-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-11.*