--- title: "Opioids Dosage Conversion - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Opioids by Chris Marcellino MD and Norris Vivatrat MD is an opioid analgesic dosage conversion calculator for use by trained medical professionals. The application supports conversion to and from opio" --- # Opioids Dosage Conversion — United States ![Opioids Dosage Conversion App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/60/d2/3d/60d23d95-6a37-dd61-96ad-cb5165ef77bb/AppIcon-0-0-1x_U007emarketing-0-10-0-85-220.png/434x0w.png) **Developer:** [Chris Marcellino MD](https://apptail.io/developer/chris-marcellino-md-Sryb) **Category:** Medical **Rating:** 4.3/5 (18 ratings) **Price:** Free **Bundle ID:** com.professorebm.Opioids **Store:** Apple App Store **Country:** United States **Version:** 3.0.3 (released 2025-10-09) **Original Release:** 2010-07-30 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id382383903) **AppTail Page:** [https://apptail.io/app/opioids-dosage-conversion-cZce/united-states](https://apptail.io/app/opioids-dosage-conversion-cZce/united-states) ## Opioids Dosage Conversion Description Opioids by Chris Marcellino MD and Norris Vivatrat MD is an opioid analgesic dosage conversion calculator for use by trained medical professionals. The application supports conversion to and from opioids commonly prescribed and used in U.S. hospitals orally, parenterally, or transdermally, including morphine, codeine, hydromorphone, hydrocodone, fentanyl, methadone, oxycodone and oxymorphone. The application is intended to help and instruct in the process of conversion of opioid regimens. • Native support for iPhone, iPad and iPod touch • Multiple route support • Multiple drug support • Incomplete cross tolerance option • Breakthrough dosing calculator • Provides instructional details about each calculation • Saves last calculation on exit • Supports landscape and portrait modes • Reference guide By Professor EBM, the Internal Medicine Residency Teaching Resource for Evidence-Based Medicine: a resource of the Santa Clara Valley Medical Center. While effort has been made to ensure that calculations are accurate and that conversion factors are in accordance with current accepted medical practices, use of this application is entirely at your own risk. This application should only be used by trained medical professionals and all results should be double checked by hand. Use of the app requires acceptance of the terms of use that are included with the application. Please send support requests and feedback using the link in the About tab of the app, though as a free academic tool we only have limited resources to address new feature requests. Opioid equipotency data is taken from CAPC conversion values except where noted (see the reference tab in the app.) CAPC values are as published in the Center to Advance Palliative Care Prescribing Opioids: A Reference Guide curriculum, which are adapted from McPherson ML. Demystifying Opioid Conversion Calculations: A Guide for Effective Dosing, 2nd ed. American Society of Health-System Pharmacists, Bethesda, Maryland, 2018. EPEC values are as published in EPEC-O Participants Handbook, 2005. Chris Marcellino, MD — Mayo Clinic Norris Vivatrat, MD — UCSD Medical Center Special thanks to Dr. Tom Mouser (EveryStep, Des Moines, IA) and Dr. David Rand (UVM Medical Center). ## Opioids Dosage Conversion Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/5d/c0/96/5dc09653-5f9a-2d44-2d9a-431e511be4c7/mzl.fgigexxp.png/640x960.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/6e/9b/09/6e9b0966-23f1-877f-b8c6-79eefb12109f/mzl.roeftltu.png/640x960.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/ce/a5/a4/cea5a409-51fa-60a6-37ea-9bf65d397ee9/mzl.szaajwfw.png/640x960.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/74/d9/31/74d931ef-cc50-0e6d-7607-55972cdd518b/mzl.jlrfwfxi.png/640x960.png) ## Opioids Dosage Conversion Rating Breakdown in United States - 5 stars: 12 (67%) - 4 stars: 3 (17%) - 3 stars: 1 (6%) - 2 stars: 0 (0%) - 1 stars: 2 (11%) ## Opioids Dosage Conversion Reviews in United States ### ***** "EBM converter" I use this app daily in my practice and regularly give it to learners. Great app! -- MD Tacoma, 2025-09-02 ### ***** "Needs IV option for fentanyl" Otherwise excellent app! Recommended throughout anesthesia and palliative departments -- Nick RM, MD, 2023-07-14 ### *---- "Needs better interface" Very cumbersome, and needs better user interface. Needs update. -- Ventilator74, 2022-07-26 ### *---- "Incomplete" Does not include Tapentadol or many other opioids. Only dosing options are q6h, q8h and w24h. -- SLO83, 2018-11-01 ### ***** "You are the best tool I found after looking for so long... Thank you !!!" Thanks!!!!!! -- MD pain, 2015-04-03 ### ***** "Great tool" Use it all the time. It is quick and efficient! -- ChrisBritt83, 2014-12-06 ### ****- "Pretty good opioid calculator" When I upgraded my iPhone to iOS 8, I lost the ability to use my original opioid calculator app, the opioid. This is a fairly suitable replacement, and it works well with good stability on my iPhone 5S running iOS 8. The only suggestion I would have is that it is cumbersome to enter in numerical quantities for milligrams received using "rollers" instead of a keypad. -- shrimppesto, 2014-10-26 ### ***** "Great app!!" I use it everyday working in pain management! The only improvements you could make is add Nucynta and a two a day dose for Fentanyl Patch!! -- VBryant, 2014-10-12 ### ***** "Allows conversion for patients on multiple meds" Allows for the entry of multiple opioids that can merge into a single conversion recommendation. Well annotated. Other apps I have used required the use of scratch paper to write down intermediate results. Not this one! Thanks for making conversions for my patients faster and safer. -- wizkyd, 2014-06-04 ### ***** "Helps my practice" Makes it quicker to switch patients meds, less PDR USEAGE -- jim tigges, 2014-01-02 [View all Opioids Dosage Conversion reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Opioids Dosage Conversion Discovered Keywords - eopioid - opioids - opioid tool - opioids dosage conversion ## Apps Similar to Opioids Dosage Conversion - [Contraception Point-of-Care](https://apptail.io/app/contraception-point-of-care-Cwl/united-states) - [ASCCP Management Guidelines](https://apptail.io/app/asccp-management-guidelines-sqH/united-states) - [New Innovations](https://apptail.io/app/new-innovations-OsH/united-states) - [MedHub](https://apptail.io/app/medhub-SuH/united-states) - [AHA ACLS](https://apptail.io/app/aha-acls-TuH/united-states) - [AAFP](https://apptail.io/app/aafp-dfR/united-states) - [ASRA Coags](https://apptail.io/app/asra-coags-UdT/united-states) - [MKSAP 19](https://apptail.io/app/mksap-19-jlUb/united-states) - [MyABFM](https://apptail.io/app/myabfm-ZmVt/united-states) - [ACP MKSAP](https://apptail.io/app/acp-mksap-cTZu/united-states) ## Opioids Dosage Conversion Available In - [United States](https://apptail.io/app/opioids-dosage-conversion-cZce/united-states) - [Mexico](https://apptail.io/app/opioids-dosage-conversion-cZce/mexico) - [Japan](https://apptail.io/app/opioids-dosage-conversion-cZce/japan) - [Australia](https://apptail.io/app/opioids-dosage-conversion-cZce/australia) - [Belgium](https://apptail.io/app/opioids-dosage-conversion-cZce/belgium) - [Switzerland](https://apptail.io/app/opioids-dosage-conversion-cZce/switzerland) - [France](https://apptail.io/app/opioids-dosage-conversion-cZce/france) - [United Kingdom](https://apptail.io/app/opioids-dosage-conversion-cZce/united-kingdom) - [Indonesia](https://apptail.io/app/opioids-dosage-conversion-cZce/indonesia) - [Russia](https://apptail.io/app/opioids-dosage-conversion-cZce/russia) - [Chile](https://apptail.io/app/opioids-dosage-conversion-cZce/chile) - [Thailand](https://apptail.io/app/opioids-dosage-conversion-cZce/thailand) - [Italy](https://apptail.io/app/opioids-dosage-conversion-cZce/italy) - [Germany](https://apptail.io/app/opioids-dosage-conversion-cZce/germany) - [Colombia](https://apptail.io/app/opioids-dosage-conversion-cZce/colombia) - [Luxembourg](https://apptail.io/app/opioids-dosage-conversion-cZce/luxembourg) - [Brazil](https://apptail.io/app/opioids-dosage-conversion-cZce/brazil) - [Netherlands](https://apptail.io/app/opioids-dosage-conversion-cZce/netherlands) - [Canada](https://apptail.io/app/opioids-dosage-conversion-cZce/canada) - [Spain](https://apptail.io/app/opioids-dosage-conversion-cZce/spain) - [Romania](https://apptail.io/app/opioids-dosage-conversion-cZce/romania) - [Saudi Arabia](https://apptail.io/app/opioids-dosage-conversion-cZce/saudi-arabia) - [Singapore](https://apptail.io/app/opioids-dosage-conversion-cZce/singapore) - [Türkiye](https://apptail.io/app/opioids-dosage-conversion-cZce/turkey) - [Ukraine](https://apptail.io/app/opioids-dosage-conversion-cZce/ukraine) - [Argentina](https://apptail.io/app/opioids-dosage-conversion-cZce/argentina) - [Vietnam](https://apptail.io/app/opioids-dosage-conversion-cZce/vietnam) - [Azerbaijan](https://apptail.io/app/opioids-dosage-conversion-cZce/azerbaijan) - [Bahrain](https://apptail.io/app/opioids-dosage-conversion-cZce/bahrain) - [Belarus](https://apptail.io/app/opioids-dosage-conversion-cZce/belarus) - [China](https://apptail.io/app/opioids-dosage-conversion-cZce/china) - [Algeria](https://apptail.io/app/opioids-dosage-conversion-cZce/algeria) - [Estonia](https://apptail.io/app/opioids-dosage-conversion-cZce/estonia) - [Egypt](https://apptail.io/app/opioids-dosage-conversion-cZce/egypt) - [Hungary](https://apptail.io/app/opioids-dosage-conversion-cZce/hungary) - [Ireland](https://apptail.io/app/opioids-dosage-conversion-cZce/ireland) - [India](https://apptail.io/app/opioids-dosage-conversion-cZce/india) - [Lebanon](https://apptail.io/app/opioids-dosage-conversion-cZce/lebanon) - [Sri Lanka](https://apptail.io/app/opioids-dosage-conversion-cZce/sri-lanka) - [Madagascar](https://apptail.io/app/opioids-dosage-conversion-cZce/madagascar) - [Nepal](https://apptail.io/app/opioids-dosage-conversion-cZce/nepal) - [New Zealand](https://apptail.io/app/opioids-dosage-conversion-cZce/new-zealand) - [Peru](https://apptail.io/app/opioids-dosage-conversion-cZce/peru) - [Pakistan](https://apptail.io/app/opioids-dosage-conversion-cZce/pakistan) - [Poland](https://apptail.io/app/opioids-dosage-conversion-cZce/poland) - [Portugal](https://apptail.io/app/opioids-dosage-conversion-cZce/portugal) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*