Best Rpm Calculator Apps

Measure RPM with mobile cameraMeasure RPM with strobe light simulationAdjust RPM with seek bar or buttons

Measure rotational speed using your phone's camera or a simulated strobe light. Simply mark the rotating object and adjust the settings until it appears stationary to get an accurate RPM reading. The app also functions as a torchlight.

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Lathe RPM Calculator

by Slava Barouline

Material selectionDesignation selectionTool type selection

Calculate lathe RPM based on material, designation, and tool type. Supports a wide range of materials and allows for unit changes. Simply input your work diameter to get the RPM value.

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Strobe tachometer (RPM meter)

+ Laser Tachometer + Magnetic

Strobe tachometer functionLaser tachometer modeMagnetic tachometer mode

Measure rotational speeds of objects using your phone's flashlight, laser, or magnetic sensor. Detect precise RPMs with adjustable flicker frequencies and a wide measurement range. Ideal for analyzing fan speeds, engine RPMs, and more.

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Pulley system setupCalculate belt velocityDetermine pulley torques

Belt & Pulley Calculator

Setup two pulley system

$0.99

Calculate key parameters for a two-pulley system. Input pulley sizes, speed, power, and distance to determine belt velocity, tension, torques, wrap angle, and driven pulley RPM. Supports both imperial and metric units.

Perform a variety of calculations related to vehicle drivelines and engines. This tool helps users get the most out of genuine Spicer parts with specialized calculators for RPM, fuel savings, and more.

Driveline Angle CalculatorDriveshaft RPM CalculatorFuel Savings Calculator

💼 Business

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RPM Meter for Turntable

No fuss Tachometer

Measures Min RPMMeasures Max RPMMeasures Avr RPM

Easily measure the actual RPM of your turntable with this straightforward tachometer. It provides detailed readings including minimum, maximum, and average RPM, along with percentage discrepancy and wow and flutter measurements.

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by Natural Style Co. Ltd.

Giri -The RPM Checker-

Rotational speed measurementNoise removal for accuracySpeed conversion panel

This tool measures the rotational speed of motors, ideal for hobbyists working with drivable model cars. It features noise removal, speed conversion, and a memo panel for recording measurements. Customizable skins add a personal touch to the user experience.

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CNC Machinist Calculator Ultra

All-in-One Machining Tool

Cutting speed and feed recommendationsTap drill size calculationsTrue position calculations

This app provides machinists and engineers with a comprehensive suite of tools for CNC operations. It offers a wide range of calculations for turning, milling, drilling, and more, designed to enhance precision and boost productivity.

Strobe light effect, RPM meter

Strobe light effect simulationRotational speed measurement (RPM/Hz)Slow-motion video recording

This app uses slow-motion video to create a strobe light effect, allowing you to measure rotational speeds. It records video with detailed information like frame rate and exposure, and offers customizable text overlays.

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Speedometer with large display

Speedometer»

Displays speed in mph, km/h, knotsLarge, clear indicatorsRetina display support

This application displays your current speed in miles per hour, kilometers per hour, or knots. It features a large, clear display with Retina support for optimal visibility. Accuracy is enhanced by adjusting indicator transparency.

🗺️ Navigation

(46K)

ad-supported

Panecal Scientific Calculator

For engineers and students

Formula editing with cursor and swipeReuse past formulasVariable memory for calculations

This app functions as a scientific calculator, enabling users to input and edit complex formulas with ease. It supports formula history, variable memory, and various number system conversions for accurate calculations.

Financial/Sci RPN calculator

(1.9K)

ad-supported

Motor Power Calculator

RPN financial calculatorRPN scientific calculatorProgramming functions

This app offers a powerful RPN calculator with financial and scientific functions, mimicking popular industry-standard models. It includes programming capabilities and expandable flavors for diverse calculation needs.

💰 Finance

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Strobe Light Tachometer

by Motionics, LLC

Adjustable strobe speed (1-130Hz / 60-7800RPM)Quick adjustment buttons (x2, ÷2)Fine-tuning buttons for precise speed

Transform your iPhone into a powerful strobe light and tachometer. Precisely control flashing speeds from 1Hz to 130Hz to measure the RPM of rotating objects by making them appear stationary. Ideal for precise speed measurements in dark environments.

📊 Productivity

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True Note - Record Player Test

Turntable speed checker

Turntable speed testingStrobe disc calibrationAdjustable speed check

Check your record player's speed accuracy using your phone's LED light and a printable strobe disc. Ensure your turntable is playing at the correct RPM for optimal audio quality. Useful for calibration and pre-purchase checks.

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Moto Gear Ratio Calculator RPM

Sprocket Speed Shift Analyzer

$1.99

eCPM, CTR, RPM Calculator

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Estimated Earning Calculator

$1.99