---
title: "Ratio Calc! - Bewertungen, Einnahmen und Downloads in Sonderverwaltungsregion Hongkong | Apple App Store"
description: "Ratio Calc is a quick and easy tool for radio control car racers to use trackside. Knowing your final drive ratio (FDR) is very useful for comparison with other racers to determine if your car is gear"
---

# Ratio Calc! — Sonderverwaltungsregion Hongkong
> Gearing for your R/C car

![Ratio Calc! App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/2f/b7/2f/2fb72f28-5a82-4da8-d215-6db820f71157/AppIcon-0-1x_U007epad-0-1-0-sRGB-85-220-0.png/434x0w.png)

**Developer:** [David Mills](https://apptail.io/de/developer/david-mills-NWMb)
**Category:** Sports
**Rating:** 4.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** uk.co.ashdownapps.ratiocalcnoads
**Store:** Apple App Store
**Country:** Sonderverwaltungsregion Hongkong
**Version:** 7.5.1 (released 2025-11-11)
**Original Release:** 2011-05-12
**Languages:** English, German, Italian, Spanish

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/hk/app/app/id436311293)
**AppTail Page:** [https://apptail.io/de/app/ratio-calc-sob/hong-kong](https://apptail.io/de/app/ratio-calc-sob/hong-kong)

## Ratio Calc! Description
Ratio Calc is a quick and easy tool for radio control car racers to use trackside. Knowing your final drive ratio (FDR) is very useful for comparison with other racers to determine if your car is geared correctly.

It lets you quickly select your car by filtering on manufacturer and model. Select your pinion and spur size and the FDR is displayed. Tyre diameter can also be entered to calculate your rollout. 

Ratio and roll out charts are also available which plot pinion and spur gear combinations to create very handy reference tables. 

- Save your favourite cars for quick access

- Select measurement units (imperial/metric)

- Select your preferred gear pitch, alternative ratios in other pitches will be shown

- Over 2000 cars/variants in the database which is updated regularly

## Ratio Calc! Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/99/7a/19/997a19c2-c02e-2dae-d0e5-18c762d5c3b5/English__U005ben_U005d__U007c_iPad_-_13_U0022_Display_-_1.png/2752x2064.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/a8/cc/75/a8cc7508-fda0-df2d-cb24-f50e64bca2a1/English__U005ben_U005d__U007c_iPad_-_13_U0022_Display_-_2.png/2752x2064.png)

## Ratio Calc! Rating Breakdown in Sonderverwaltungsregion Hongkong
- 5 stars: 0 (0%)
- 4 stars: 1 (100%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)



## Ratio Calc! Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Bezahlt | Sonderverwaltungsregion Hongkong | Sports | #4 |
| Top Bezahlt | Malaysia | Sports | #28 |
| Top Bezahlt | Thailand | Sports | #32 |
| Top Bezahlt | Kolumbien | Sports | #36 |
| Top Bezahlt | Singapur | Sports | #44 |
| Top Bezahlt | Italien | Sports | #48 |
| Top Bezahlt | Indonesien | Sports | #51 |
| Top Bezahlt | Ecuador | Sports | #55 |
| Top Bezahlt | Taiwan | Sports | #57 |
| Top Bezahlt | Südkorea | Sports | #60 |
| Top Bezahlt | Philippinen | Sports | #62 |
| Top Bezahlt | Österreich | Sports | #65 |
| Top Bezahlt | Portugal | Sports | #68 |
| Top Bezahlt | Chile | Sports | #68 |
| Top Bezahlt | Niederlande | Sports | #72 |
| Top Bezahlt | Südafrika | Sports | #73 |
| Top Bezahlt | Vietnam | Sports | #76 |
| Top Bezahlt | Rumänien | Sports | #76 |
| Top Bezahlt | Kuwait | Sports | #77 |
| Top Bezahlt | Türkei | Sports | #79 |
| Top Bezahlt | Griechenland | Sports | #80 |
| Top Bezahlt | Schweiz | Sports | #81 |
| Top Bezahlt | Ungarn | Sports | #82 |
| Top Bezahlt | Vereinigte Arabische Emirate | Sports | #85 |
| Top Bezahlt | Dänemark | Sports | #90 |
| Top Bezahlt | Saudi-Arabien | Sports | #95 |
| Top Bezahlt | Brasilien | Sports | #98 |
| Top Bezahlt | Spanien | Sports | #99 |
| Top Bezahlt | Norwegen | Sports | #103 |
| Top Bezahlt | Australien | Sports | #105 |
| Top Bezahlt | Peru | Sports | #105 |
| Top Bezahlt | Dominikanische Republik | Sports | #106 |
| Top Bezahlt | Russland | Sports | #108 |
| Top Bezahlt | Deutschland | Sports | #109 |
| Top Bezahlt | Belgien | Sports | #112 |
| Top Bezahlt | Japan | Sports | #112 |
| Top Bezahlt | Vereinigtes Königreich | Sports | #115 |
| Top Bezahlt | China | Sports | #115 |
| Top Bezahlt | Finnland | Sports | #115 |
| Top Bezahlt | Frankreich | Sports | #116 |
| Top Bezahlt | Neuseeland | Sports | #116 |
| Top Bezahlt | Tschechien | Sports | #129 |
| Top Bezahlt | Schweden | Sports | #137 |
| Top Bezahlt | Mexiko | Sports | #143 |
| Top Bezahlt | Kanada | Sports | #168 |
| Top Bezahlt | Polen | Sports | #181 |
| Top Bezahlt | Ukraine | Sports | #205 |
| Top Bezahlt | Israel | Sports | #241 |
| Top Bezahlt | Sonderverwaltungsregion Hongkong | Overall | #249 |
| Top Bezahlt | Vereinigte Staaten | Sports | #288 |
| Top Bezahlt | Argentinien | Sports | #291 |
| Top Bezahlt | Indien | Sports | #407 |
| Top Bezahlt | Irland | Sports | #445 |

## Ratio Calc! Discovered Keywords
- ratio calc


## Ratio Calc! Available In
- [Vereinigte Staaten](https://apptail.io/de/app/ratio-calc-sob/united-states)
- [Vereinigtes Königreich](https://apptail.io/de/app/ratio-calc-sob/united-kingdom)
- [Deutschland](https://apptail.io/de/app/ratio-calc-sob/germany)
- [Italien](https://apptail.io/de/app/ratio-calc-sob/italy)
- [Australien](https://apptail.io/de/app/ratio-calc-sob/australia)
- [Schweiz](https://apptail.io/de/app/ratio-calc-sob/switzerland)
- [Österreich](https://apptail.io/de/app/ratio-calc-sob/austria)
- [Südafrika](https://apptail.io/de/app/ratio-calc-sob/south-africa)
- [Kanada](https://apptail.io/de/app/ratio-calc-sob/canada)
- [Spanien](https://apptail.io/de/app/ratio-calc-sob/spain)
- [Thailand](https://apptail.io/de/app/ratio-calc-sob/thailand)
- [Frankreich](https://apptail.io/de/app/ratio-calc-sob/france)
- [Taiwan](https://apptail.io/de/app/ratio-calc-sob/taiwan)
- [Griechenland](https://apptail.io/de/app/ratio-calc-sob/greece)
- [Niederlande](https://apptail.io/de/app/ratio-calc-sob/netherlands)
- [China](https://apptail.io/de/app/ratio-calc-sob/china)
- [Schweden](https://apptail.io/de/app/ratio-calc-sob/sweden)
- [Singapur](https://apptail.io/de/app/ratio-calc-sob/singapore)
- [Malaysia](https://apptail.io/de/app/ratio-calc-sob/malaysia)
- [Belgien](https://apptail.io/de/app/ratio-calc-sob/belgium)
- [Kolumbien](https://apptail.io/de/app/ratio-calc-sob/colombia)
- [Ungarn](https://apptail.io/de/app/ratio-calc-sob/hungary)
- [Sonderverwaltungsregion Hongkong](https://apptail.io/de/app/ratio-calc-sob/hong-kong)
- [Philippinen](https://apptail.io/de/app/ratio-calc-sob/philippines)
- [Dänemark](https://apptail.io/de/app/ratio-calc-sob/denmark)
- [Norwegen](https://apptail.io/de/app/ratio-calc-sob/norway)
- [Südkorea](https://apptail.io/de/app/ratio-calc-sob/south-korea)
- [Rumänien](https://apptail.io/de/app/ratio-calc-sob/romania)
- [Madagaskar](https://apptail.io/de/app/ratio-calc-sob/madagascar)
- [Vereinigte Arabische Emirate](https://apptail.io/de/app/ratio-calc-sob/united-arab-emirates)
- [Malta](https://apptail.io/de/app/ratio-calc-sob/malta)
- [Mexiko](https://apptail.io/de/app/ratio-calc-sob/mexico)
- [Nigeria](https://apptail.io/de/app/ratio-calc-sob/nigeria)
- [Nepal](https://apptail.io/de/app/ratio-calc-sob/nepal)
- [Neuseeland](https://apptail.io/de/app/ratio-calc-sob/new-zealand)
- [Peru](https://apptail.io/de/app/ratio-calc-sob/peru)
- [Pakistan](https://apptail.io/de/app/ratio-calc-sob/pakistan)
- [Polen](https://apptail.io/de/app/ratio-calc-sob/poland)
- [Portugal](https://apptail.io/de/app/ratio-calc-sob/portugal)
- [Russland](https://apptail.io/de/app/ratio-calc-sob/russia)
- [Saudi-Arabien](https://apptail.io/de/app/ratio-calc-sob/saudi-arabia)
- [Slowakei](https://apptail.io/de/app/ratio-calc-sob/slovakia)
- [Tunesien](https://apptail.io/de/app/ratio-calc-sob/tunisia)
- [Türkei](https://apptail.io/de/app/ratio-calc-sob/turkey)
- [Ukraine](https://apptail.io/de/app/ratio-calc-sob/ukraine)
- [Usbekistan](https://apptail.io/de/app/ratio-calc-sob/uzbekistan)
- [Vietnam](https://apptail.io/de/app/ratio-calc-sob/vietnam)
- [Nordmazedonien](https://apptail.io/de/app/ratio-calc-sob/north-macedonia)
- [Armenien](https://apptail.io/de/app/ratio-calc-sob/armenia)
- [Argentinien](https://apptail.io/de/app/ratio-calc-sob/argentina)
- [Aserbaidschan](https://apptail.io/de/app/ratio-calc-sob/azerbaijan)
- [Bulgarien](https://apptail.io/de/app/ratio-calc-sob/bulgaria)
- [Brunei Darussalam](https://apptail.io/de/app/ratio-calc-sob/brunei)
- [Brasilien](https://apptail.io/de/app/ratio-calc-sob/brazil)
- [Belarus](https://apptail.io/de/app/ratio-calc-sob/belarus)
- [Chile](https://apptail.io/de/app/ratio-calc-sob/chile)
- [Zypern](https://apptail.io/de/app/ratio-calc-sob/cyprus)
- [Tschechien](https://apptail.io/de/app/ratio-calc-sob/czechia)
- [Dominikanische Republik](https://apptail.io/de/app/ratio-calc-sob/dominican-republic)
- [Algerien](https://apptail.io/de/app/ratio-calc-sob/algeria)
- [Ecuador](https://apptail.io/de/app/ratio-calc-sob/ecuador)
- [Ägypten](https://apptail.io/de/app/ratio-calc-sob/egypt)
- [Finnland](https://apptail.io/de/app/ratio-calc-sob/finland)
- [Indonesien](https://apptail.io/de/app/ratio-calc-sob/indonesia)
- [Irland](https://apptail.io/de/app/ratio-calc-sob/ireland)
- [Israel](https://apptail.io/de/app/ratio-calc-sob/israel)
- [Indien](https://apptail.io/de/app/ratio-calc-sob/india)
- [Island](https://apptail.io/de/app/ratio-calc-sob/iceland)
- [Japan](https://apptail.io/de/app/ratio-calc-sob/japan)
- [Kuwait](https://apptail.io/de/app/ratio-calc-sob/kuwait)
- [Kasachstan](https://apptail.io/de/app/ratio-calc-sob/kazakhstan)
- [Libanon](https://apptail.io/de/app/ratio-calc-sob/lebanon)
- [Litauen](https://apptail.io/de/app/ratio-calc-sob/lithuania)
- [Luxemburg](https://apptail.io/de/app/ratio-calc-sob/luxembourg)
- [Lettland](https://apptail.io/de/app/ratio-calc-sob/latvia)

---

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