Best Gear Ratio Calculator Apps

Top speed calculation per gearInput tire dimensionsInput transmission gear ratios

Calculate your vehicle's top speed for each gear using transmission ratios, differential gear ratio, and rev limit. Optimize your car's gear ratio for track performance or drag racing, choosing between kmh and mph units.

All the calculators you need

Gear ratio calculationSuspension geometry analysisCorner weight balancing

This app offers a suite of specialized calculators for RC car enthusiasts. It helps with gear ratios, suspension geometry, corner weights, oil viscosity, fuel usage, and top speed estimations. It also stores data for multiple cars and includes helpful guides.

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Bicycle Gear Ratio App

by Niriko Cestnik

Gear ratio calculationGear inches and metersSpeed calculation (mph/km/h)

Calculate and compare bicycle gear ratios to find the optimal gearing for your ride. Input chainring and cog sizes, and see detailed metrics like gear inches, speed, and more. Customize your setup or choose from presets for easy comparison.

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Gear Ratio Calculator Lite

by ABT Co., Ltd.

Gear ratio calculation for road and MTBSimulation of gear combinationsSpeed-cadence graph generation

Calculate and visualize gear ratios for road bikes and MTBs. Simulate optimal gear combinations with various chainwheels, sprockets, and tires. Helps in selecting replacement parts by displaying speed-cadence graphs and gear ratio charts.

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Gear Simulation & Calculation

Calculate Gears Fast and Easy

$3.99

This tool calculates gear ratios, torque, and speed for gear train systems. It allows users to simulate how these systems work on the fly, aiding in the design of custom gear systems before physical creation. Ideal for DIY enthusiasts and engineers.

Calculate gear ratioCalculate torque and speedSimulate gear train operation

Basic & Scientific Calculator

Basic and scientific calculator modesOver 30 scientific operationsCustomizable appearance (iPad)

This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.

by SpiralArm Consulting Limited

Calculate Outside DiameterCalculate Centre DistanceCalculate Ratio

Calculate essential dimensions for spur gears and pinions using diametral pitch or module. This tool provides outside diameter, center distance, and ratio for specific gear types.

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Bike Gear Ratio Analyzer

by ANDREW WILLIAM NEWSOM

Gear ratio calculationSpeed at any cadenceClimbing limit analysis

Instantly analyze your bicycle's drivetrain performance. Calculate gear ratios, speed at any cadence, and climbing limits based on your bike's components and power output. Ideal for cyclists planning rides or optimizing their setup.

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HeartWatch: Heart Rate Monitor

Health Check & Pulse Tracker

$8.99

This app provides a comprehensive overview of your Apple Watch health data, offering detailed analysis of heart rate, activity, and workouts. It features intelligent trend analysis, personalized goals, and the ability to log notes and measurements for a complete wellness picture. Export your data for medical practitioners.

Heart rate metric analysisActivity and workout trackingIntelligent trend analysis

💪 Health & Fitness

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BikeCalc - Gear Calculator

Gear calculator for cyclists

Gear ratio calculationSpeed at cadence calculationCustom cassette building

Optimize your bicycle's gearing with this comprehensive calculator. Analyze gear ratios, calculate speed at cadence, and manage custom configurations. Features include component browsing, sharing options, and helpful articles.

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Scientific Calculator Plus 991

Designed for math calculator

Natural display inputGraphing moduleFormula library

This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.

📚 Education

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Moto Gear Ratio Calculator RPM

Sprocket Speed Shift Analyzer

This app offers a versatile calculator experience with both standard and scientific modes. Customize its appearance, use it in any orientation, and access additional tools like a notes tab and calculation history. It's designed for students and professionals needing accurate calculations.

Standard and scientific calculator modesCustomizable look (iPad only)Portrait and landscape orientation

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Calculate Final Drive Ratio (FDR)Calculate Rollout with tire diameterFilter cars by manufacturer and model

Ratio Calc!

Gearing for your R/C car

$2.99

This app helps radio control car racers calculate their final drive ratio and rollout. Easily select your car, input gear sizes, and get instant results. It also offers charts and saves favorite cars for quick access.

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Planetary Gear Calculator

Design Planetary Gears System

$3.99

Calculate gear teeth and speed for planetary gear systems. Quickly simulate how these systems work on the fly, ideal for DIYers designing their own systems before 3D printing. Understand the formulas and components of epicyclic gear systems.

Calculate gear teethCalculate gear speedSimulate planetary gear systems

Calculate essential mountain bike gearing metrics like gear ratios, gear inches, and gain ratios. This tool helps cyclists understand and optimize their bike's performance.

Calculate gear ratiosCalculate gear inchesCalculate gain ratios

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Rollout Calculator - RC DD car

Set up with three good tables!

Rollout distance calculationThree display tablesPinion and spur gear selection

This utility app calculates the travel distance of an RC direct drive car per motor rotation. It simplifies setup by displaying results in three easy-to-read tables, allowing users to select gear teeth and tire diameter.