Best Opioid Calculator Apps

214+ iOS apps curated and reviewed

4.5 avg rating
15 free apps
Updated July 2026

If you already know Opioid Calculator, this is the deeper bench. 214+ opioid calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Opioid Calculator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Opioid CalculatorOpioid Calculator$0.993.7★ (9)NoNoJul 2026
2Opioid Conversion CalculatorOpioid Conversion CalculatorFree3.6★ (14)NoYesJul 2026
3Opioids Dosage ConversionOpioids Dosage ConversionFree4.3★ (18)NoNoMay 2026
4MDCalc Medical CalculatorMDCalc Medical CalculatorFree4.9★ (51K)NoNoJul 2026
5Opioid ToolOpioid ToolFree3.6★ (8)NoNoMay 2026
6Calculate by QxMDCalculate by QxMDFree4.8★ (5.1K)YesNoJul 2026
7CliniCalc Medical CalculatorCliniCalc Medical CalculatorFree4.8★ (1.1K)NoYesJul 2026
8Calculator ∞Calculator ∞$5.994.7★ (6.2K)NoYesJul 2026

Top Picks for Opioid Calculator

Opioid Conversion Calculator#2

Opioid Conversion Calculator by Ayrial Beall

Your Conversion Companion
Strong Contender
🏥 Medical
3.6(14 ratings)
FreeIn-App Purchases
Opioid Conversion Calculator screenshot 1
Opioid Conversion Calculator screenshot 2
Opioid Conversion Calculator screenshot 3
Opioid Conversion Calculator screenshot 4
Opioid Conversion Calculator screenshot 5

This medical app simplifies complex opioid conversion tasks for healthcare professionals. It offers extensive drug coverage, a visual safety indicator for dosages, and breakthrough dosing calculations. Available in multiple languages, it ensures accurate and safe pain management.

More Opioid Calculator apps to explore

4
MDCalc Medical Calculator
MDCalc Medical Calculator
MDCalc Medical Calculator
Clinical Decision Support
Free

This app provides over 900 evidence-based medical calculators, risk scores, and clinical tools for healthcare professionals. It offers offline functionality, expert insights, and CME tracking to support patient care at the bedside. Tools are developed and validated by board-certified physicians.

900+ evidence-based calculatorsOffline functionalityExpert insights and commentary
🏥 Medical
(51K)
free
5
Opioid Tool
Opioid Tool
Opioid Tool
by aaron sobol
Free

This medical app provides tools for healthcare professionals rotating through specific rotations. It includes an opioid conversion calculator, a 30-day refill calculator, and a reference for opioid metabolites. A prescribing checklist is also available to aid in patient care.

Opioid conversion calculator30-day refill calculatorOpioid metabolite reference
🏥 Medical
(8)
free
6
Calculate by QxMD
Calculate by QxMD
Calculate by QxMD
Medical Calculator
Free

This clinical calculator and decision support tool offers over 200 medical calculators and tools for diagnosis, treatment, and prognosis. It adapts to your practice and provides detailed references, integrating with PubMed and Read by QxMD.

Over 200 medical calculatorsClinical decision support toolsCardiology, internal medicine, and more
🏥 Medical
(5.1K)
free with in-app purchases
7
CliniCalc Medical Calculator
CliniCalc Medical Calculator
CliniCalc Medical Calculator
Formulas, Scales & More
Free

This app provides medical professionals with a comprehensive collection of formulas, scores, and classifications. It offers quick access to essential medical calculations with detailed background information and high-quality images. Users can easily search, store favorites, and switch between US and SI units.

Hundreds of medical formulas, scores, and classificationsStore favorite and view recently used calculationsSearchable database with keywords
🏥 Medical
(1.1K)
free with in-app purchases
8
Calculator ∞
Calculator ∞
Calculator ∞
The Best Scientific Calculator
$5.99

This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.

Step-by-step solution hintsMath Photos SolverHandwriting Recognition
📚 Education
(6.2K)
free with in-app purchases
9
Calculator #
Calculator #
Calculator #
Scientific Calculator
Free

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Math Photos SolverHandwriting RecognitionAI Math Problem Solver
🔧 Utilities
(36K)
free with in-app purchases
10
ClevCalc - Calculator
ClevCalc - Calculator
ClevCalc - Calculator
All-In-One Calculator
Free

This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.

Scientific calculatorUnit converterCurrency converter
📊 Productivity
(12K)
free with in-app purchases
11
CDC Vaccine Schedules
CDC Vaccine Schedules
CDC Vaccine Schedules
by Centers for Disease Control and Prevention
Free

Provides healthcare professionals with quick access to CDC-recommended immunization schedules for all ages. Features include color-coded schedules, hyperlinked vaccine details, and catch-up schedules. Content is automatically updated when connected to ensure the latest information.

Infant, child, and adolescent schedulesAdult immunization recommendationsContraindications and precautions table
🏥 Medical
(93)
free
12
Calculator with History Tape
Calculator with History Tape
Calculator with History Tape
No Ads Calculator with Memory
Free

This app provides a straightforward calculator experience with a comprehensive history log of all your computations. Customize the keyboard, display, and history records to suit your needs. Easily add annotations and titles to past calculations for better organization.

History record functionDisplay input equationAdjustable keyboard size and font
📊 Productivity
(3.2K)
free with in-app purchases
13
Digits Tape Calculator
Digits Tape Calculator
Digits Tape Calculator
The calculator for humans
$1.99

This app offers a calculator with an editable, line-by-line tape history, combining spreadsheet-like functionality with calculator simplicity. Easily correct mistakes, add comments, and share or print your calculations.

Editable line-by-line tape historyCorrect and insert entriesAdd labels and comments
🔧 Utilities
(1.1K)
free with in-app purchases
14
Calculator‰
Calculator‰
Calculator‰
Default Calculator
Free

This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.

Large buttonsClear displayFast calculations
🔧 Utilities
(404K)
ad-supported
15
Orenda
Orenda
Orenda
Pool Calculator and Education
Free

This app helps you master pool chemistry by accurately calculating chemical dosages and balancing water based on the LSI. It offers a user-friendly experience for both novices and professionals, including a volume estimator and educational videos.

Chemical dosing calculatorLSI water balancingPool volume estimator
📊 Productivity
(452)
free
16
Kalkyl
Kalkyl
Kalkyl
Just a really good calculator
Free

A powerful and intuitive calculator designed for speed and ease of use. Features include collaboration, haptic feedback, and advanced input methods like keyboard trackpad mode. Offers basic graphing and localized number formatting for a seamless user experience.

Optimized for quick calculationsCollaborate on documentsIntuitive design with haptic feedback
🔧 Utilities
(714)
freemium
17
Calcularium
Calcularium
Calcularium
Reactive Advanced Calculator
Free

This app offers real-time calculations, allowing you to see results as you type. It goes beyond basic arithmetic with advanced functions, unit conversions, and customizable expressions, acting as a powerful helper for complex calculations.

Reactive CalculationsVoice Control (Siri)Script and Photo Input
📊 Productivity
(2.2K)
free with in-app purchases
18
Calculator Easy HD
Calculator Easy HD
Calculator Easy HD
Best One-step Calculator
$0.99

This app offers a user-friendly calculator experience with a focus on ease of use. It features a live voice input, an ergonomic layout with large keys, and a usage history for quick reference. Results can be easily copied or emailed.

Live voice calculatorErgonomic key layoutExtra large '+' key
🔧 Utilities
(1.2K)
free with in-app purchases
19
Calculator!
Calculator!
Calculator!
by 7th Gear
$0.99

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
🔧 Utilities
(4.2K)
free with in-app purchases
20
epocrates: Drug Info & Pill ID
epocrates: Drug Info & Pill ID
epocrates: Drug Info & Pill ID
Dosing, Interactions, & Labs
Free

This clinical reference app empowers healthcare professionals to make safer, faster decisions. It offers comprehensive drug information, interaction checks, pill identification, lab values, and dosing calculators. Access essential clinical tools offline to enhance patient care and workflow efficiency.

Comprehensive Drug ReferenceDrug Interaction CheckerPill Identifier
🏥 Medical
(7.1K)
free with in-app purchases

FAQ about Opioid Calculator

What are the best opioid calculator apps for iPhone?
Opioid Calculator tops our opioid calculator apps ranking as of July 2026, with a 3.7-star average from 9 App Store ratings, and it's priced at $0.99.
Yes — 15 of the top opioid calculator apps we rank are free to download, including Opioid Conversion Calculator and Opioids Dosage Conversion.
Opioid Calculator has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 214+ opioid calculator apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
The Opioid Calculator is a tool designed to calculate the total oral Morphine Equivalent Daily Dose (oMEDD), particularly when patients are using combinations of opioids. It aims to provide consistency and accessibility for clinical practice, education, and research.
The Opioid Calculator is produced by the Faculty of Pain Medicine of the Australian and New Zealand College of Anaesthetists (FPM ANZCA). FPM ANZCA is the peak body responsible for education, training, and standards in specialist pain medicine in Australia and New Zealand.