Ratio Calc!

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

-Car search now works by manufacturer name as well -Fixed some manufacturer logo display issues -Improved the database update process -Some updated manufacturer logos -Fixed an issue with Zen Racing no longer showing

Developer

David Mills

Main Category

Sports

Version

7.5.1

Version Release

2025-11-11

Initial Release

2011-05-12

Size

46 MB

Age Rating

4+

Price

USD 2.99

Languages

EN, DE, IT, ES

Bundle ID

uk.co.ashdownapps.ratiocalcnoads

Version Rating

★ 4.52 (25)

First Seen

2026-05-28

Metadata updated 2026-06-16

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