# Gear Ratio Speed Calc

> Multi-Stage Drive Train Tool

Canonical page: [https://chrome-stats.com/d/id6761039376](https://chrome-stats.com/d/id6761039376)

## Overview

- **ID:** `id6761039376`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Shanghai Sheyuan Network Technology Co., Ltd.
- **Category:** Utilities
- **Version:** 1.0.2
- **Last updated:** 2026-06-28
- **First published:** 2026-03-25
- **Size:** 995 KB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/gear-ratio-speed-calc/id6761039376)
- **Privacy policy:** [https://calcspec.com/app-privacy.html](https://calcspec.com/app-privacy.html)

## Description

18T driving 54T into a 2:1 second stage at 1,750 RPM - final output? Overall ratio, output RPM, torque mult for single, dual, triple stage. $1.99 one-time, no login.

Designing a gear train and need to know the final output RPM and torque multiplier for single, dual, or triple stage setups? Enter driver and driven teeth counts, set your input RPM, and get instant results. Includes 8 common gear presets for fast selection on the shop floor.

FEATURES:
- Single, dual, and triple stage gear ratio calculations
- Calculate overall gear ratio, output RPM, and torque multiplier
- 8 common gear presets for quick selection
- Custom driver and driven teeth input for any gear combination
- Supports any input RPM value
- Clean, dark-themed interface for shop and field use

FORMULAS:
- Gear Ratio = Driven Teeth / Driver Teeth
- Output RPM = Input RPM / Overall Gear Ratio
- Torque Multiplier = Overall Gear Ratio
- Multi-stage: Overall Ratio = Stage 1 x Stage 2 x Stage 3

PRESETS INCLUDED:
12/48 (4:1), 15/45 (3:1), 18/36 (2:1), 20/40 (2:1), 16/64 (4:1), 24/72 (3:1), 20/60 (3:1), 14/56 (4:1)

Perfect for designing gear trains, verifying speed reductions, and calculating torque multiplication in mechanical power transmission systems.

## Rankings

- #2,275,824 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6761039376)