How Many Animals Does Going Vegan Save Per Year? (365 vs 105, Explained)
Going vegan spares somewhere between 105 and 365 animals per year, depending on how you count. The famous "one animal a day" figure includes fish and shellfish; the stricter 105 figure counts only vertebrates using UN production data. Both are legitimate. In this post we show exactly where each number comes from, what else a vegan year saves, and how to track your own running total with our free Vegan Impact Counter.
Most pages that rank for this question pick one number and run with it. We would rather show you the math. That is kind of our whole thing.
In this article
- Where does "365 animals a year" come from?
- Why does one major study say only 105?
- Which number should you actually use?
- What else does a vegan year save?
- How do I track my own impact?
- FAQ
Where does "365 animals a year" come from?
The most quoted figure in the vegan world is that going vegan saves roughly one animal per day, which works out to about 30 a month and 365 a year. Organizations like The Humane League use this number, and it is the basis of most "animals saved" calculators online, including ours.
The math behind it is straightforward: take the number of animals killed for food each year, divide by the meat-eating population, and you get an average of roughly one animal per person per day. The key detail most pages leave out is that this count includes fish. Fish are small, they are eaten in enormous numbers, and they make up the majority of that daily average. If you only counted cows, a single person would "use up" one animal every few months, because cows are large. Count every individual animal, and one a day is a defensible average.
Why does one major study say only 105?
In 2021, Animal Charity Evaluators took a stricter approach. Using UN Food and Agriculture Organization production data, they estimated that one person eating plant-based spares about 105 vertebrates per year: on average 79 wild-caught fish, 14 farmed fish, and 12 farmed land animals (mostly chickens).
Why so much lower? Three reasons. First, it counts only vertebrates, so shrimp, prawns, and other shellfish (eaten in the billions) are excluded entirely. Second, it works from production data rather than advocacy averages, which smooths out regional differences in consumption. Third, it excludes most indirect deaths in the supply chain. It is a conservative floor, not a competing truth.
Which number should you actually use?
Here is the honest comparison:
| Estimate | Animals per year | What it counts | Best for |
|---|---|---|---|
| Advocacy average (Humane League and others) | ~365 (one per day) | All animals, including fish and shellfish | Understanding total lives affected |
| Animal Charity Evaluators (2021) | ~105 | Vertebrates only, from FAO production data | A conservative, research-grade floor |
Our take: use the range, not a single number. Somewhere between 105 and 365 animals per year are spared by one person going vegan, and the true figure depends mostly on whether you count invertebrates and indirect deaths. Either way, over a decade that is between roughly 1,000 and 3,650 individual animals. That is not a rounding error. That is a barn.
And to address the skeptic in the comments: no, the supermarket does not restock one fewer chicken the day you go vegan. Demand works in aggregate. Producers respond to falling demand by raising and killing fewer animals over time, which is why economists talk about lives spared rather than rescued. Fewer animals bred into the system is the entire point.
Every animal counts, whether it moos, clucks, or swims. Organic, cruelty-free, and 10% of every purchase goes to charities supporting animals, people, and the planet.
What else does a vegan year save?
Animals are the headline, but they are not the whole story. Based on the peer-reviewed averages our Vegan Impact Counter uses, one day of vegan eating also saves, on average:
- About 1,100 gallons of water, based on water footprint research from UNESCO-IHE. Animal agriculture is astonishingly thirsty; a single pound of beef takes roughly 1,800 gallons to produce. Over a year that is around 400,000 gallons saved.
- About 2.5 kg of CO2 equivalent, based on the landmark Oxford analysis by Poore and Nemecek (2018), the largest food-systems study ever conducted. That is roughly 900 kg per year, close to a metric ton of emissions.
- About 18 kg of grain, based on FAO feed-conversion data. Most of the world's grain is grown to feed livestock, not people. Skip the middle animal and the grain goes a lot further.
These are averages, and averages have error bars. Your personal numbers depend on what you ate before and what you eat now. But the direction is not in dispute in the scientific literature: plant-based diets use dramatically less water, land, and carbon per calorie than animal-based ones.
How do I track my own impact?
This is exactly why we built the Vegan Impact Counter. We got tired of "ethical" being a buzzword with no receipts, so we made a tool that shows them.
Enter the date you went vegan and it calculates your personal running totals: animals spared, water saved, CO2 avoided, and grain preserved, using the sourced averages above. It also tracks milestones (30 days, one year, and beyond) and generates a shareable impact card sized for Instagram posts and Stories, so your numbers can do a little quiet activism of their own.
New to all this? Start with our Beginner's Guide to Becoming Vegan, then come back and set your start date. Day one counts.
The years add up, and so do the animals. Cozy, ethical, built to outlast your next few hundred saved lives.
Frequently asked questions
Does going vegan actually save animals?
Yes, through reduced demand. One person going vegan does not empty a slaughterhouse tomorrow, but sustained lower demand means fewer animals are bred, raised, and killed over time. Research-based estimates put the effect at between 105 and 365 animals spared per person per year.
How many animals does a vegan save in a lifetime?
Using the range above, a person who goes vegan at 25 and lives to 80 spares somewhere between roughly 5,800 and 20,000 animals over their lifetime, most of them fish and chickens.
Do the "animals saved" numbers include fish?
Yes, and fish dominate them. In the Animal Charity Evaluators estimate, 93 of the 105 animals spared per year are wild-caught or farmed fish. Any calculator that excludes fish will show a dramatically smaller number.
How much water does going vegan save?
Around 1,100 gallons per day on average, based on UNESCO-IHE water footprint research, or roughly 400,000 gallons per year. Most of that water would have gone to growing feed crops for livestock.
How does the For Health For Ethics Vegan Impact Counter work?
You enter your vegan start date, and the counter multiplies your days vegan by peer-reviewed daily averages: about 1 animal, 1,100 gallons of water, 2.5 kg of CO2, and 18 kg of grain per day. It then shows milestones and generates a shareable impact card. It is free and lives at forhealthforethics.com/pages/vegan-impact-counter.
See your numbers
Enter your vegan start date and watch the animals, water, and CO2 add up. Then share the card and start a conversation.
Try the Vegan Impact Counter →Free, no signup, takes 10 seconds. Every day is a vote for a kinder world.