# EBFcalc — NBC/OBC EBF calculator

> NBC/OBC EBF calculator (iPhone/iPad app by Pawel Fiett.)

- Source: https://appshunter.io/ios/app/ebfcalc/id6749156606 (this page in markdown: same URL + `.md`)
- Developer: [Pawel Fiett](https://appshunter.io/developer/1825453361)
- Category: Business, Productivity
- Price: $1.99
- Age rating: 4+
- Requires: iOS 18.5 · 7 MB
- Languages: American English
- Released: 2025-07-29
- Data updated: 2026-05-07
- User reviews in markdown: https://appshunter.io/ios/app/ebfcalc/id6749156606/reviews.md

## What is EBFcalc?

This app helps calculate the maximum permitted percentage of unprotected openings for buildings based on the National Building Code of Canada (NBC) and Ontario Building Code (OBC) tables for Part 9 and 3 buildings.


## Version history (last 3 releases)

### 1.2 — 2026-04-04

v.1.2 changes:
• reviewed all OBC/NBC tables for new code versions.
• bug fixes.

### 1.1 — 2025-07-31

-fixed edge conditions for all tables to match the NBC/OBC intent
- minor fixes

### 1.0 — 2025-07-29

No release notes.

## More apps by Pawel Fiett

- [Arch TimeTrack](https://appshunter.io/ios/app/arch-timetrack/id6748364364)

All apps by Pawel Fiett: https://appshunter.io/developer/1825453361

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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 2026-05-07.*