# 鉄筋電卓 − 重量・定尺・配筋・生コン

> 鉄筋電卓 − 重量・定尺・配筋・生コン (iPhone/iPad app by Moeki Kozawa.)

- Source: https://appshunter.io/ios/app/id6783316434 (this page in markdown: same URL + `.md`)
- Developer: [Moeki Kozawa](https://appshunter.io/developer/1770452138)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 63 MB
- Languages: American English, Japanese
- Released: 2026-06-25
- Data updated: 2026-09-04
- User reviews in markdown: https://appshunter.io/ios/app/id6783316434/reviews.md

## What is 鉄筋電卓 − 重量・定尺・配筋・生コン?

[Built for rebar, formwork and site crews]
Run the numbers on site. Enter the bar size and length for total weight, the span and pitch for bar count, and get stock-cut loss, concrete volume and mixer-truck count from your phone.

[What it calculates]
- Rebar weight: total weight from size (D10-D51), length and count (JIS nominal unit mass)
- Stock-cut & loss: required stock bars, offcut and loss rate
- Spacing to count: bar count and actual pitch from span, pitch and end clearance
- Concrete volume: volume and mixer-truck count from member size x qty and loss
- Lap / development length: required length from size and multiplier (editable quick table)
- Unit convert: tsubo, square meters, jo, shaku, kg, t

[Takeoff (Pro)]
Group line items by bar size, sum the total weight, and share as a PDF.

[Privacy & offline]
All data stays on your device. No servers, no logins, no ads, no required network.

[Pricing]
The basic calculators are free. The Pro upgrade (one-time, no subscription) unlocks the takeoff sheet, takeoff PDF export, unlimited saved history and the company-logo feature.

Note: results are an aid. Always confirm final ordering and construction against the drawings, standards and specifications.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Rebar Calc Pro | $4.99 | one-time |



## Version history (last 5 releases)

### 1.2.0 — 2026-09-02

Added purchase-order PDF export with recipient, site name, serial number, and issuer details.

### 1.1.1 — 2026-08-14

Minor improvements and adjustments.

### 1.1.0 — 2026-07-30

- Save and manage rebar takeoff lists per project (site name and author are printed on the PDF).
- Two A4 PDF report formats: cutting list and quantity takeoff table, with per-size subtotals and total weight.
- Add a shape note (bent, hoop, etc.) to each line item.
- Minor improvements.

### 1.0.4 — 2026-07-02

Minor improvements and stability fixes.

### 1.0.3 — 2026-06-30

・The "More apps" list now shows only related job-site tools.
・Related apps now open in an in-app App Store view.
・Minor improvements and stability fixes.

## Apps similar to 鉄筋電卓 − 重量・定尺・配筋・生コン

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| --- | --- | --- | --- |
| [Trash Lens](https://appshunter.io/ios/app/trash-lens/id1640726539) | — | Free | Utilities |
| [BulletsMind - Simple Outliner](https://appshunter.io/ios/app/bulletsmind-simple-outliner/id1629214528) | — | Free | Utilities |
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| [推しメーカー、貴方の推しをAIで再現！](https://appshunter.io/ios/app/ai/id6471916677) | — | Free | Utilities |
| [Concrete Calculator Estimator](https://appshunter.io/ios/app/concrete-calculator-estimator/id6468353781) | 5.0 (5) | Free | Utilities |

## More apps by Moeki Kozawa

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- [My Little Words: First Words](https://appshunter.io/ios/app/my-little-words-first-words/id6765714146)

All apps by Moeki Kozawa: https://appshunter.io/developer/1770452138

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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 2026-09-04.*