# Stair and Angle Calculator

> Stair and Angle Calculator (iPhone/iPad app by Paul Simmonds.)

- Source: https://appshunter.io/ios/app/stair-and-angle-calculator/id1073382196 (this page in markdown: same URL + `.md`)
- Developer: [Paul Simmonds](https://appshunter.io/developer/1068604965)
- Category: Utilities, Education
- Price: $0.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2016-01-14
- Data updated: 2026-07-18
- User reviews in markdown: https://appshunter.io/ios/app/stair-and-angle-calculator/id1073382196/reviews.md

## What is Stair and Angle Calculator?

Stair and Angle Calculator gives tradespeople and DIYers six precise calculators in one clean, fast app. No clutter,
  no subscriptions — just the numbers you need on site.

  STAIRS
  Enter total height, total run, and maximum step height. The app works out the number of steps, exact riser height, and
   going, accounting for optional top and bottom landings.

  ROOF
  Calculate rafter length, ridge height, and roof area. Work by pitch angle or by rise — enter your total span and the
  app does the rest. Add roof depth to get surface area for materials.

  TRIANGLE
  Solve any right-angle triangle. Enter two of the three sides (A, B, or hypotenuse C) and get the missing side, both
  angles, and area instantly.

  AREA
  Switch between rectangle and circle modes. Enter length and width for area, or add height to get volume — useful for
  concrete, soil, or fill calculations. Circle mode gives area and circumference from a radius.

  CIRCLE
  Go deeper with circle geometry. Enter a radius and optional arc angle to calculate arc length, chord length, and
  sector area — useful for curved walls, arches, and landscaping.

  ROOM
  Plan paint, tiles, and flooring for any room. Enter length, width, and height, then specify the number of doors and
  windows (or a total opening area) to get net wall area automatically deducted.

  UNITS
  All calculators support mm, cm, m, and ft. Switch units at any time using the ruler button — inputs convert instantly.

  Simple, reliable, and built for real work.


## Version history (last 5 releases)

### 2 — 2026-05-18

- New Calculators Added

### 1.5 — 2017-02-14

New colour scheme
- sorted out some of the auto layout problems.

### 1.4 — 2016-06-24

Fixed a few issues with auto layout

### 1.3 — 2016-05-31

New colour scheme! 

Added in area calculator

Also we have changed to auto-layout (there may be layout issues whilst we are testing on all devices so keep letting us know if you have any problems!)

### 1.2 — 2016-01-22

New colour scheme! 

Added in area calculator

Also we have changed to auto-layout (there may be layout issues whilst we are testing on all devices so keep letting us know if you have any problems!)

## More apps by Paul Simmonds

- [Beat The Bleep!](https://appshunter.io/ios/app/beat-the-bleep/id1076098928)
- [Meal Bill Calc](https://appshunter.io/ios/app/meal-bill-calc/id1089017251)
- [Simple Height Calculator](https://appshunter.io/ios/app/simple-height-calculator/id1126111847)
- [BodyMetricsBuddy](https://appshunter.io/ios/app/bodymetricsbuddy/id6767919608)

All apps by Paul Simmonds: https://appshunter.io/developer/1068604965

## Related topics

[stair and angle calculator](https://appshunter.io/ios/topics/stair-and-angle-calculator)

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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 2026-07-18.*