# KerfSmart Carpentry Calculator — Fractions & Cut List Optimizer

> Carpentry calculator for measurements in feet, inches, and fractions with cut list optimization. (iPhone/iPad app by Dylan McCaffrey.)

- Source: https://appshunter.io/ios/app/kerfsmart-carpentry-calculator/id6817965236 (this page in markdown: same URL + `.md`)
- Developer: [Dylan McCaffrey](https://appshunter.io/developer/6817965238)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-10-10
- Data updated: 2026-10-26
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/kerfsmart-carpentry-calculator/id6817965236/reviews.md

## What is KerfSmart Carpentry Calculator?

KerfSmart is a carpentry calculator built the way you measure: in feet, inches and fractions. Add up a run of trim, lay out a sheet of plywood, or figure where to clamp your straightedge, all without converting to decimals.

TAPE-MEASURE CALCULATOR
• Type 5' 3 1/2" + 2' 7 3/8" and get 7' 10 7/8". No decimal math.
• Add, subtract, multiply and divide lengths. Length × length gives square feet; three lengths give board feet or cubic feet.
• Results round to the precision you choose, from 1/2" down to 1/64", with a + or − marker when the true value is a hair over or under.
• Tap any result for conversions: decimal inches and feet, millimeters, meters, square feet, 4×8 sheets, board feet and cubic yards.
• Ans and a 50-entry history let you keep working from your last answer.
• Full metric mode.

CUT LISTS WITH THE KERF BUILT IN
• Length: enter your parts and stock length. KerfSmart packs them onto the fewest boards, subtracts a saw kerf for every cut, and draws each board to scale with mark positions and the offcut.
• Lumber: enter length, width and quantity. KerfSmart picks which boards to buy with the least waste, using only the widths and lengths you can get or haul home. It can also suggest a rough-sawn blank to mill.
• Plywood: lays out your parts on the fewest sheets using straight-through cuts you can make with a circular, track or table saw. Each sheet is drawn to scale with numbered cut lines and step-by-step instructions like "Rip a 23 1/4" strip off the 96" × 48" panel." Lock grain direction when it matters.
• Print the plan or share it as a PDF to take to the shop or the lumberyard.

CIRCULAR SAW GUIDE
Enter the distance to your cut line and KerfSmart tells you exactly where to clamp your straightedge, accounting for your saw's base plate offset and which side of the line is waste. Measure your saw once and never cut a piece short again.

CARPENTRY TOOLS
• Board feet and lumber cost, with hardwood thickness shortcuts
• Even spacing for balusters, pickets and shelves, by count or by maximum gap
• Stairs: risers, treads, total run, stringer length and angle, with riser and tread checks
• Rafters and roof pitch: rafter and tail length, rise, run, plumb cut angle, pitch to degrees
• Stud layout marks at 12", 16", 19.2" and 24" on center
• Diagonal and square check, with how far out of square you are
• Frame miter angles for any number of sides
• Arc radius from width and rise

MADE FOR THE SHOP
• Set your blade kerf, saw offsets, default stock length, stair limits and fraction precision once.
• Every length field accepts whatever you type: 3/32, 2.4mm, 1 1/2", 8'.
• Clean light blue design with full dark mode, on iPhone and iPad.
• No account, no ads, no tracking. Works offline, and saved projects sync through your own private iCloud.

Whether you are building furniture, framing a wall or trimming out a room, KerfSmart does the math so you can measure once and cut once.

KERFSMART PRO
The calculator, Length cut lists, Saw Guide and every carpentry tool are free. Lumber and Plywood cut lists and saved projects are part of KerfSmart Pro, a one-time $9.99 purchase. No subscription.

KerfSmart's results are estimates for planning. Always check measurements on your material before cutting, follow your tools' safety instructions, and check local building codes for stairs, rafters and other structural work.

## Key features

- Fractional measurement calculations
- Cut list optimization with kerf subtraction
- Plywood and lumber layout
- Circular saw guide for precise cuts
- Metric and imperial modes
- 50-entry calculation history
- Offline functionality

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| KerfSmart Pro | $9.99 | one-time |


## Is KerfSmart Carpentry Calculator safe?

Not enough ratings yet to assess KerfSmart Carpentry Calculator.

## Is KerfSmart Carpentry Calculator legit?

KerfSmart Carpentry Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for KerfSmart Carpentry Calculator is 65 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/kerfsmart-carpentry-calculator/id6817965236/reviews.md

### 5/5 — Absolutely Fantastic

*2026-10-16*

There is nothing better than this app for all your measuring needs. This one app serves all my needs and more. Keep up the great work!

**Developer response:** Thank you so much for the feedback! We are glad to hear about this experience.

## Frequently asked questions about KerfSmart Carpentry Calculator

### Does KerfSmart have ads?

No, KerfSmart is ad-free. The app explicitly states 'no ads, no tracking' and works offline, ensuring an uninterrupted user experience.

### What platforms is KerfSmart available on?

KerfSmart is available on iPhone and iPad, supporting both devices with a clean design and full dark mode.

### How does KerfSmart handle fractions?

KerfSmart allows direct input of fractions like 3/32 or 1 1/2" and performs calculations without converting to decimals. Results can be rounded to a precision of 1/64" with an optional + or − marker.

### Can KerfSmart optimize cut lists?

Yes, KerfSmart optimizes cut lists by packing parts onto the fewest boards, subtracting saw kerf for each cut, and indicating mark positions and offcuts. It also helps select lumber based on least waste and available dimensions.

### Is KerfSmart suitable for beginners?

While designed for professionals, KerfSmart's ability to work directly with fractional measurements and its clear layout make it accessible for beginners who want to avoid decimal conversions in their projects.

### How often is KerfSmart updated?

The latest version is 1.0.3, last updated on October 18, 2026. While this indicates a recent update, the frequency of future updates is not specified.

### What is the age rating for KerfSmart?

KerfSmart has an age rating of 4+, making it suitable for a wide range of users, including younger individuals learning about measurements and construction.

### Does KerfSmart work offline?

Yes, KerfSmart is designed to work offline. Saved projects can also sync privately through iCloud, ensuring accessibility even without an internet connection.

## Version history (last 4 releases)

### 1.0.3 — 2026-10-18

New: KerfSmart Pro, a one-time $9.99 unlock for Lumber and Plywood cut lists and saved projects. No subscription. Plus small fixes throughout.
Updated name

### 1.0.2 — 2026-10-13

-fixed website links in privacy policy, safety and disclaimer, terms of use
-kerf defaults to 0 for saw guide
-labels cleaned up
-pressing operators in a row keeps only the last one

### 1.0.1 — 2026-10-12

-icloud sync support. Saved projects: name your cut lists and open them instantly on any of your devices with iCloud sync.
-Projects sync through your own iCloud account to every iPhone and iPad signed in to the same Apple Account. A copy is also kept on the device, so they work offline. When the same project is edited in two places, the newest edit wins, and deleting a project removes it everywhere.
- added ipad support
- Introducing KerfSmart Pro, a one-time purchase that unlocks Plywood and Lumber cut lists, PDF printing and saved projects. No subscription. If you downloaded KerfSmart before this update, Pro is already unlocked for you. Thank you for being an early user!

### 1.0 — 2026-10-10

No release notes.

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## More apps by Dylan McCaffrey

- [CabbyCut: Cabinet Cut List](https://appshunter.io/ios/app/cabbycut-cabinet-cut-list/id6818005568)
- [Collector's Ledger: Inventory](https://appshunter.io/ios/app/collectors-ledger-inventory/id6818628823)
- [Digital Armory: Gun Inventory](https://appshunter.io/ios/app/digital-armory-gun-inventory/id6821200361)

All apps by Dylan McCaffrey: https://appshunter.io/developer/6817965238

## Related topics

[carpentry math](https://appshunter.io/ios/topics/carpentry-math)

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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 2026-10-26.*