--- title: "Intra-Op Fluid Calculator - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Are you an Anesthesia provider? Do you want a quick, reliable way to calculate intraoperative fluid requirements without fumbling through mental math or outdated charts? This app does just that! Usin" --- # Intra-Op Fluid Calculator — United States > Maintenance crystalloid calc ![Intra App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/37/ae/db/37aedb13-bac7-6d8d-9461-3f93f9dcd4b3/app_icon_fluidcalculator-0-0-1x_U007ephone-0-1-85-220.png/434x0w.png) **Developer:** [Kaia Cares](https://apptail.io/developer/kaia-cares-zgJfR) **Category:** Medical **Rating:** 5.0/5 (3 ratings) **Price:** $3.99 **Bundle ID:** Tyler.fluidcalculator **Store:** Apple App Store **Country:** United States **Version:** 1.0.3 (released 2026-01-08) **Original Release:** 2025-09-16 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6748544694) **AppTail Page:** [https://apptail.io/app/intra-op-fluid-calculator-FhNw/united-states](https://apptail.io/app/intra-op-fluid-calculator-FhNw/united-states) ## Intra Description Are you an Anesthesia provider? Do you want a quick, reliable way to calculate intraoperative fluid requirements without fumbling through mental math or outdated charts? This app does just that! Using published references and case studies, we’ve built a tool that calculates weight-based maintenance fluids, preoperative NPO deficits, and allows you to adjust for intraoperative fluid losses by case complexity. Simply enter your patient’s ideal body weight, NPO time, surgery length, and desired mL/kg/hr maintenance rate — the app will generate an hour-by-hour table and chart of recommended fluid administration. This calculator was created in consultation with practicing Anesthesiologists to reflect recommended best practices and commonly used formulas. The calculations follow well-known guidelines such as the “4-2-1 rule” for maintenance and Furman et al.’s approach for NPO deficit replacement, expanded for adult patients. We continuously review published literature and local practices and will provide updates when changes are made. The purpose of this app is to serve as a general-use fluid management reference for licensed Anesthesia providers (Anesthesiologists, CRNAs, CAAs, etc.) to support intraoperative planning. It is not intended to replace formal training, institutional policies, or professional judgment. References are provided for transparency and to give users confidence in the underlying formulas. DISCLAIMER: This app is not a substitute for your clinical judgment, institutional protocols, or published guidelines. Always confirm calculations against your hospital, state, or specialty society recommendations and apply your clinical expertise to each unique patient scenario ## Intra Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/bf/8b/2e/bf8b2e41-0ef7-a0fc-0958-e5833a1af162/Simulator_Screenshot_-_iPhone_16_Plus_-_2025-09-12_at_20.08.07.png/1290x2796.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/48/61/93/486193db-5e6c-6a7d-3445-7437ace0b9bd/Simulator_Screenshot_-_iPhone_16_Plus_-_2025-09-12_at_20.08.16.png/1290x2796.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/0f/a3/1c/0fa31c2b-0d73-aeee-93f5-462c01bcb256/Simulator_Screenshot_-_iPhone_16_Plus_-_2025-09-12_at_20.08.36.png/1290x2796.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/1c/13/5b/1c135bcd-bceb-5006-bd3e-06f86adeaa2b/Simulator_Screenshot_-_iPhone_16_Plus_-_2025-09-12_at_20.09.14.png/1290x2796.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/f6/8b/42/f68b429c-430e-0bc6-f52d-670277a5108d/Simulator_Screenshot_-_iPhone_16_Plus_-_2025-09-12_at_20.09.25.png/1290x2796.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/32/6e/9b/326e9b6a-1a92-3f40-9c60-8e41dad0c55d/Simulator_Screenshot_-_iPhone_16_Plus_-_2025-09-12_at_20.09.35.png/1290x2796.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/68/5e/af/685eaf6b-7d89-8cef-a752-e512ddfda987/Simulator_Screenshot_-_iPhone_16_Plus_-_2025-09-12_at_20.09.44.png/1290x2796.png) ## Intra Rating Breakdown in United States - 5 stars: 3 (100%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 0 (0%) ## Intra Reviews in United States ### ***** "Easy to use :)" The intra-op fluid calculator app is incredibly straightforward and user-friendly. The interface is clean which makes calculations quick before or during a case. Perfect for anesthesia providers looking for a simple, reliable tool in the OR. -- its-great, 2025-09-19 ### ***** "Amazing app!" Excellent app and very simple to use. I use it every time I work a long surgical case and found it does a great job keeping a patient euvolemic. -- RIPP1986, 2025-09-19 ### ***** "Awesome" I found it easy to use and aesthetically pleasing! Would recommend to my colleagues. -- AuBeck96, 2025-09-18 [View all Intra reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Apps Similar to Intra - [Pedi Crisis 2.0](https://apptail.io/app/pedi-crisis-20-xnp/united-states) - [QGenda](https://apptail.io/app/qgenda-rqH/united-states) - [MedHub](https://apptail.io/app/medhub-SuH/united-states) - [AHA ACLS](https://apptail.io/app/aha-acls-TuH/united-states) - [ASRA Coags](https://apptail.io/app/asra-coags-UdT/united-states) - [NYSORA Nerve Blocks](https://apptail.io/app/nysora-nerve-blocks-VdT/united-states) - [myTIPreport](https://apptail.io/app/mytipreport-ZdT/united-states) - [UNC Health](https://apptail.io/app/unc-health-qjY/united-states) - [C8 Health](https://apptail.io/app/c8-health-tHZb/united-states) - [Emergency Manual](https://apptail.io/app/emergency-manual-rCSu/united-states) ## Intra Available In - [United States](https://apptail.io/app/intra-op-fluid-calculator-FhNw/united-states) - [Greece](https://apptail.io/app/intra-op-fluid-calculator-FhNw/greece) - [Italy](https://apptail.io/app/intra-op-fluid-calculator-FhNw/italy) - [Denmark](https://apptail.io/app/intra-op-fluid-calculator-FhNw/denmark) - [Saudi Arabia](https://apptail.io/app/intra-op-fluid-calculator-FhNw/saudi-arabia) - [Thailand](https://apptail.io/app/intra-op-fluid-calculator-FhNw/thailand) - [Japan](https://apptail.io/app/intra-op-fluid-calculator-FhNw/japan) --- ## 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. 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