# Concrete Calculator: Bags — Slabs, Footings & Columns

> Slabs, Footings & Columns (iPhone/iPad app by Blas Prieto.)

- Source: https://appshunter.io/ios/app/concrete-calculator/id6759359069 (this page in markdown: same URL + `.md`)
- Developer: [Blas Prieto](https://appshunter.io/developer/1878084920)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 25 MB
- Languages: American English
- Released: 2026-02-20
- Data updated: 2026-03-17
- User reviews in markdown: https://appshunter.io/ios/app/concrete-calculator/id6759359069/reviews.md

## What is Concrete Calculator?

Know exactly how many bags of concrete to buy - for slabs, footings, columns, and stairs.

Takes your project dimensions and gives cubic yards (or meters), bags needed, and includes a 10% waste factor.

KEY FEATURES:

* 4 Shape Types - Slab, footing, column, and stairs
* Bag Calculator - 40, 60, or 80 lb (or 20, 25, 40 kg metric)
* Built-in Waste Factor - Automatic 10% waste
* Imperial & Metric - Feet/inches and meters/centimeters
* Cubic Yards & Meters - Volume in your preferred unit

Free to download. No sign-up. No paywall. Works offline.

By Blas Apps - simple calculators that do one thing perfectly.


## Version history (last 5 releases)

### 1.0.7 — 2026-03-16

Improved App Store listing.

### 1.0.6 — 2026-03-05

Fixed interstitial ad loading. Improved stability and performance.

### 1.0.5 — 2026-03-03

Fixed a crash that could occur on app launch. Improved stability and performance.

### 1.0.4 — 2026-03-03

Fixed a crash that could occur on app launch. Improved stability.

### 1.0.3 — 2026-03-03

Bug fixes and performance improvements.

## More apps by Blas Prieto

- [Compound Calc: Savings](https://appshunter.io/ios/app/compound-calc/id6759321374)
- [Auto Loan Calc: Car Payment](https://appshunter.io/ios/app/auto-loan-calc/id6759358751)
- [Ovulation Calc & Fertile Days](https://appshunter.io/ios/app/ovulation-calc-and-fertile-days/id6759358803)
- [Mulch Calculator & Estimator](https://appshunter.io/ios/app/mulch-calculator-and-estimator/id6759358826)
- [BTU Calculator: AC & HVAC](https://appshunter.io/ios/app/btu-calculator/id6759358896)
- [Freelance Rate Calculator](https://appshunter.io/ios/app/freelance-rate-calculator/id6759358903)

All apps by Blas Prieto: https://appshunter.io/developer/1878084920

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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 2026-03-17.*