VetPDA Calcs contains 21 useful calculators for Veterinary Medicine students and professionals. All calculators have been rewritten to support different iPhone sizes (including the iPhone X).

Included Calculators:

• A-a Gradient - The Alveolar-arterial gradient (A-a gradient), is a measure of the difference between the alveolar concentration of oxygen and the arterial concentration of oxygen. It is used in diagnosing the source of hypoxemia
• Anesthesia Drug Calc - Calculates recommended dosage (based on weight) for many drugs commonly used in anesthesia.
• Anion Gap - used to differentiate the causes of metabolic acidosis
• Blood Gas Analysis - Analyze blood gas measurements to determine acidosis/alkalosis and metabolic vs. respiratory causes
• Bicarbonate Dosing - Recommended bicarbonate dosing to counteract acidosis
• Body Surface Area - Given a body weight, determine the surface area. Used to determine drug dosing
• Combining Fluids - There are a number of drugs in a clinical setting that come as a percent solution. Some examples include 50% dextrose, 25% mannitol, and 2% lidocaine. This calculator assists in manipulating these fluids to alternate percentages.
• CRI - Constant Rate of Infusion calculator. Given a weight, volume, rate of fluid flow and desired rate of drug infusion, determines how much of the drug to add to the running fluid.
• Dosing Calculator - Use this generic calculator to determine the calculated dose using the weight, dose, and concentration. NOTE: this calculator does NOT provide recommended dosing -- that's up to you :)
• Drip Rates - Assists in setting the appropriate fluid delivery rate when using a 'drip set'
• Echo Values - calculates normal cardiac dimensions in dogs < 70 kg
• Energy Requirements - Using data from 2006 NRC guide, determine energy requirements at various life stages and health statuses for dogs and cats
• Equine Fluids - Determine volume of various fluid types based on body weight
• Fluid Plan - Assists in the generation of a fluid plan to correct dehydration and ongoing fluid losses due to vomiting or diarrhea.
• Fractional Excretion of Sodium - Can be used to assist in the diagnosis of some causes of renal disease
• Maintenance Fluids - determines how much fluid an animal needs on a daily basis
• Osmolality - Measures the concentration of substances such as sodium, potassium, urea, and glucose in blood.
• Percentage Solutions - When you need to deliver a certain quantity of a drug that is suspended in solution you can use this calculator to determine how much volume of the solution you should give.
• Temperature Conversion - converts F - C and C - F
• Transfusion - Given a current and desired PCV, determine the necessary volume of donor blood product
• Weight Conversion - converts between kg / g / lbs / oz

Other Features:
• Information sheets for calculators describe how and why to use each calculator

What's New

Version 2.1

Bug fix - updated units display in Energy Requirements Calculator

Ratings and Reviews

4.9 out of 5

9 Ratings

9 Ratings



A math wiz I am not. Like many, I am baffled by CRI calculations and have found relatively little on the internet to help. Would you please provide a more ample explanation of the process , detail by detail (OK, “for dummies” would be a more appropriate term) and provide a choice to enter pounds that would automatically be transformed into kgs in the background as was done in other calculations.
Otherwise this application is EXCELLENT!!!!

Great app


Just used it for calculating potassium infusion rate in DKA cat.

The only minor modification I'd like to see us the ability to toggle on/off certain functions from the main view. For example I'd clean up that view by toggling off equine and a few other calculators so I would have to scroll around looking for the few that I regularly use.



This tool does your calculations for you! Fluid rates, drip rates, drug calculations, nutritional requirements, surface area conversions. All in one place! Helps me speed along through the day.


University of California, Davis
17.3 MB
Requires iOS 10.2 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
You must be at least 17 years old to download this app.
Frequent/Intense Medical/Treatment Information
© Regents of the University of California


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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