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My dog is peeing a lot. How do I measure her urine volume at home?

Updated On September 23rd, 2025

Pet's info: Dog | Boxer | Female | spayed | 2 years and 4 months old | 48 lbs

How can I estimate my female dog's urine volume? I know human urine flow is about 1 oz/second. Trying to determine if she might have polyuria.

2 Answers

Most Helpful Answer

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Answered By Stacey Anstaett, DVM

Veterinarian

Published on January 2nd, 2019

Unfortunately there is not way to know based on volume per second. There is just way too much variation in the size of dogs and the size of their urethras to have a ballpark to go off of. (Imagine a Great Dane versus a Chihuahua.... and even dogs of similar sizes--say a chihuahua and a Maltese--have varying anatomy that makes it impossible to measure that way). The best advice I would have for you is to catch the urine and measure it. after she's done. Use a pie plate or a foil cake pan, low to the ground, to try to minimize bothering her. It will be very difficult to catch the whole thing, but unfortunately thats really the only way to know what the volume of her urine is. Thanks for asking Petco Pet Education Center, formerly Petcoach!

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on

    If your dog has polyuria, she will also have polydipsia. So you can measure the amount she drinks in 24 hours: give her a large bowl of water full to the brim, then fill it up again after 24 hours and measure the amount you have to refill. Your dog should not drink more than 1300ml in 24 hrs. (44 fl oz). If she drinks significantly more (polydipsia) than that she is ls likely polyuric as well and needs to be seen by a veterinarian for an exam.

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