鉄筋電卓 − 重量・定尺・配筋・生コン

Moeki Kozawa · Utilities

Free

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Chart standing · US

Not currently charting in this storefront.

What changed · US

Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.

Sep 30, 2026
New version 1.2.2 → 1.2.3

Fixed the Save button on the add-item sheet overlapping the system navigation bar, and the SAMPLE watermark not appearing in the PDF preview on some devices.

Sep 20, 2026
New version 1.2.1 → 1.2.2
Sep 19, 2026
New version 1.2.0 → 1.2.1
Sep 2, 2026
New version 1.1.1 → 1.2.0
Aug 26, 2026
New version 1.0.4 → 1.1.1

Screenshots

About

[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.

What's new · 1.2.3

Fixed the Save button on the add-item sheet overlapping the system navigation bar, and the SAMPLE watermark not appearing in the PDF preview on some devices.

Details

DeveloperMoeki Kozawa
ReleasedJun 2026
UpdatedJul 2026
Version1.2.3
Size61.5 MB
RequiresiOS 15.0 or later
Age rating4+
LanguagesEnglish, Japanese
PriceFree
Categories UtilitiesProductivity
Bundle IDcom.kozawamoeki.rebarCalc