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Free pet calculator widgets for your website

Running a pet blog, a vet clinic, a grooming salon, a rescue or a breeder site? Put any of our calculators on your own page so your readers get exact answers without leaving. It is free, it has no ads inside, and it works on phones.

How to add a calculator

Pick a calculator below and click Copy code.
Paste the code into your page. In WordPress, use a Custom HTML block. In Squarespace, Wix or Webflow, use an Embed or Code block.
Publish. The calculator adjusts its height automatically. If your site strips scripts, it still works at a fixed height.

The only thing we ask is that you keep the small credit line under the calculator. The math always runs in your reader's browser and nothing they type is sent anywhere. Want a calculator we do not have,? Tell us.

Dog Age Calculator

Your dog's age in human years, by size, with the newer DNA formula too. See it live.

<iframe src="https://pawmathcalc.com/embed/dog-age-calculator/" title="Dog Age Calculator" width="100%" height="645" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Dog Age Calculator by <a href="https://pawmathcalc.com/dog-age-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Puppy Weight Calculator

Estimate your puppy's adult weight from its age and current weight. See it live.

<iframe src="https://pawmathcalc.com/embed/puppy-weight-calculator/" title="Puppy Weight Calculator" width="100%" height="729" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Puppy Weight Calculator by <a href="https://pawmathcalc.com/puppy-weight-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Dog Food Calculator

Daily calories and cups of food for your dog's weight and life stage. See it live.

<iframe src="https://pawmathcalc.com/embed/dog-food-calculator/" title="Dog Food Calculator" width="100%" height="905" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Dog Food Calculator by <a href="https://pawmathcalc.com/dog-food-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Dog Water Intake Calculator

How much water your dog should drink a day, and when it is too much. See it live.

<iframe src="https://pawmathcalc.com/embed/dog-water-intake-calculator/" title="Dog Water Intake Calculator" width="100%" height="619" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Dog Water Intake Calculator by <a href="https://pawmathcalc.com/dog-water-intake-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Dog Pregnancy Calculator

Your dog's due date from the breeding date, with a week by week timeline. See it live.

<iframe src="https://pawmathcalc.com/embed/dog-pregnancy-calculator/" title="Dog Pregnancy Calculator" width="100%" height="745" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Dog Pregnancy Calculator by <a href="https://pawmathcalc.com/dog-pregnancy-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Dog Chocolate Toxicity Calculator

How dangerous is the chocolate your dog ate? Dose by weight and type. See it live.

<iframe src="https://pawmathcalc.com/embed/dog-chocolate-toxicity-calculator/" title="Dog Chocolate Toxicity Calculator" width="100%" height="950" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Dog Chocolate Toxicity Calculator by <a href="https://pawmathcalc.com/dog-chocolate-toxicity-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Can Dogs Eat It? Food Checker

Safe, careful or toxic: check 98 foods from grapes to peanut butter. See it live.

<iframe src="https://pawmathcalc.com/embed/can-dogs-eat/" title="Can Dogs Eat It? Food Checker" width="100%" height="963" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Can Dogs Eat It? Food Checker by <a href="https://pawmathcalc.com/can-dogs-eat/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Benadryl Dosage Calculator for Dogs

The usual Benadryl (diphenhydramine) dose by weight, in tablets or liquid. See it live.

<iframe src="https://pawmathcalc.com/embed/dog-benadryl-dosage-calculator/" title="Benadryl Dosage Calculator for Dogs" width="100%" height="738" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Benadryl Dosage Calculator for Dogs by <a href="https://pawmathcalc.com/dog-benadryl-dosage-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Cat Age Calculator

Your cat's age in human years and life stage, from the vet chart. See it live.

<iframe src="https://pawmathcalc.com/embed/cat-age-calculator/" title="Cat Age Calculator" width="100%" height="528" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Cat Age Calculator by <a href="https://pawmathcalc.com/cat-age-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Cat Food Calculator

Daily calories for your cat, split into cans of wet food and cups of dry. See it live.

<iframe src="https://pawmathcalc.com/embed/cat-food-calculator/" title="Cat Food Calculator" width="100%" height="830" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Cat Food Calculator by <a href="https://pawmathcalc.com/cat-food-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Pet Age Calculator

Rabbit, hamster, rat, ferret, bird or reptile age in human years, with lifespans. See it live.

<iframe src="https://pawmathcalc.com/embed/pet-age-calculator/" title="Pet Age Calculator" width="100%" height="612" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Pet Age Calculator by <a href="https://pawmathcalc.com/pet-age-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Pet Gestation Calculator

Due date for cats, rabbits, guinea pigs, hamsters, rats, goats, horses and more. See it live.

<iframe src="https://pawmathcalc.com/embed/pet-gestation-calculator/" title="Pet Gestation Calculator" width="100%" height="625" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Pet Gestation Calculator by <a href="https://pawmathcalc.com/pet-gestation-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Small Pet Cage Size Calculator

Minimum cage or pen size for guinea pigs, rabbits, hamsters, gerbils, ferrets and more. See it live.

<iframe src="https://pawmathcalc.com/embed/small-pet-cage-size-calculator/" title="Small Pet Cage Size Calculator" width="100%" height="794" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Small Pet Cage Size Calculator by <a href="https://pawmathcalc.com/small-pet-cage-size-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Rat Cage Calculator

How many rats fit in your cage, using the 2 cubic feet per rat rule. See it live.

<iframe src="https://pawmathcalc.com/embed/rat-cage-calculator/" title="Rat Cage Calculator" width="100%" height="651" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Rat Cage Calculator by <a href="https://pawmathcalc.com/rat-cage-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Reptile Tank Size Calculator

Minimum enclosure size for snakes, lizards, geckos, turtles and axolotls. See it live.

<iframe src="https://pawmathcalc.com/embed/reptile-tank-size-calculator/" title="Reptile Tank Size Calculator" width="100%" height="560" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Reptile Tank Size Calculator by <a href="https://pawmathcalc.com/reptile-tank-size-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Aquarium Calculator

Fish tank volume in gallons and liters, water weight, heater and filter size. See it live.

<iframe src="https://pawmathcalc.com/embed/aquarium-calculator/" title="Aquarium Calculator" width="100%" height="762" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Aquarium Calculator by <a href="https://pawmathcalc.com/aquarium-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Pond Volume Calculator

Pond gallons for any shape, liner size, pump flow and how many fish fit. See it live.

<iframe src="https://pawmathcalc.com/embed/pond-volume-calculator/" title="Pond Volume Calculator" width="100%" height="664" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Pond Volume Calculator by <a href="https://pawmathcalc.com/pond-volume-calculator/">PawMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://pawmathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>