--- title: "Rough Collie Life Expectancy & Age | Dog Years" description: "How long do Rough Collies live? No breed-specific UK median is published on this page. Convert your Rough Collie's age to human years with our free calculator." image: "https://dogyears.info/result-image.png?b=Rough%20Collie&a=5&y=36" url: "https://dogyears.info/rough-collie-dog-years" --- [Guides](https://dogyears.info/guides) → Rough Collie # Rough Collie Life Expectancy and Age Calculator Large Breed Senior From 5 Lifespan 10–12 yrs A graceful, long-coated Scottish herding breed made world-famous by "Lassie" — here's how a Rough Collie's age converts to human years. This page includes an interactive dog years calculator: https://dogyears.info/rough-collie-dog-years. ## How long do Rough Collies live? This site does not publish a breed-specific UK median lifespan for the Rough Collie. Individual dogs vary. The calculator converts the years a dog has already lived. It is not a forecast of how long they will live. A 2024 Dogs Trust study of UK dogs found that larger dogs tended to have shorter lives than smaller ones, and flat-faced breeds shorter lives than dogs with a typical head shape. That pattern is not a lifespan figure for this breed. [Signs your dog is a senior](https://dogyears.info/signs-your-dog-is-a-senior) covers what to watch for as a dog gets older. Source: [Dogs Trust, longevity of UK dog breeds (2024)](https://www.dogstrust.org.uk/about-us/research-expertise/longevity-dog-breeds), reporting McMillan et al., [Scientific Reports](https://doi.org/10.1038/s41598-023-50458-w). ## Rough Collie age in human years | Dog years | Human years | Life stage | | --- | --- | --- | | 1 | 15 | Adolescent | | 2 | 24 | Adult | | 3 | 28 | Adult | | 4 | 32 | Adult | | 5 | 36 | Senior begins | | 7 | 50 | Senior | | 8 | 55 | Senior | | 10 | 66 | Senior | | 12 | 77 | Geriatric | | 13 | 82 | Geriatric | Figures based on The Royal Kennel Club's published large-breed guidance, as tabulated by Purina UK. The same numbers power the widget above and the [main calculator with Rough Collie selected at 5 years](https://dogyears.info/?b=Rough%20Collie&a=5). Want an exact figure including months? Use a decimal age in the widget (for example 7.5) or open the full calculator. The Rough Collie is classified by The Royal Kennel Club as a large breed, typically weighing 20–30 kg as an adult. Originally bred to herd sheep in the Scottish Highlands, the Rough Collie's flowing coat and elegant, refined head shape made it a global icon through its most famous ambassador, Lassie. This site does not publish a breed-specific UK median lifespan for the Rough Collie. Individual dogs vary, and a size-band chart is not a life-expectancy forecast. Use the large-breed numbers to convert the years you already have — not to predict the years still to come. A 7-year-old Rough Collie is about 50 in human years on the Royal Kennel Club large-breed table; a 7-year-old small breed is still in middle age on the small-breed table. See [small vs large breed ageing](https://dogyears.info/small-vs-large-breed-ageing) for why size changes the maths. ## Worked examples using this site's calculator These are the same Royal Kennel Club large-breed figures the homepage uses — not a separate formula. The classic ×7 rule is shown only as a comparison; it is the rule this site exists to replace. More on that in [Is the ×7 rule real?](https://dogyears.info/dog-years-x7-rule-explained) | Your Rough Collie | RKC human years | ×7 rule | What that stage usually means | | --- | --- | --- | --- | | 3 years | 28 | 21 | Adult — ×7 understates the early years | | 5 years | 36 | 35 | Senior begins on the large-breed table | | 7 years | 50 | 49 | Solidly senior; ×7 is briefly close | | 10 years | 66 | 70 | ×7 starts to overstate | Open the [full calculator at 5 years, Rough Collie already selected](https://dogyears.info/?b=Rough%20Collie&a=5), or pick another age on this page. Birth-date entry, named results, and the share card live on the homepage, not in this widget. ## What this means for your Rough Collie Collie eye anomaly (an inherited eye condition, sometimes present from birth), progressive retinal atrophy, and a drug sensitivity linked to the MDR1 gene (common in herding breeds) are all worth discussing with your vet, particularly before any anaesthesia or medication. The dense double coat needs regular, thorough grooming to prevent matting, which becomes an even more important routine to maintain as your dog ages. None of that is a diagnosis, and this page is not a substitute for your vet. The useful takeaway is practical: twice-yearly check-ups from around 5 dog years, a monthly look at body condition, and catching sudden changes early. That is the unglamorous version of healthy ageing. ## When is a Rough Collie considered a senior? Under The Royal Kennel Club's size-adjusted guidance, large breeds like the Rough Collie are generally considered senior from around **5 dog years** old. 5 dog years maps to about 36 human years on the large-breed table. By 7 (about 50), many owners notice a slower rise from the bed and a shorter stride on the second walk. Gradual change is common; sudden lameness, rapid weight loss, or a new lump is the point to read [when to take your senior dog to the vet](https://dogyears.info/when-to-take-senior-dog-to-vet) rather than wait for the next routine slot. Insurers do not have to use the same "senior from 5" line. A 5-year-old Rough Collie is already in the senior life stage on this site, but a given UK insurer may still treat that dog as mid-life for a new quote — or may already apply a higher excess. If you are weighing cover, read [pet insurance for older dogs](https://dogyears.info/pet-insurance-for-older-dogs) alongside this chart rather than assuming the two clocks match. ## How Rough Collies compare with other UK favourites Rough Collies sit in the large band on this site. Nearby pages include [Border Collie](https://dogyears.info/border-collie-dog-years) and [Bearded Collie](https://dogyears.info/bearded-collie-dog-years) — each page uses that breed's own size-band table, not a separate invented curve. The differences we do publish are lifespan midpoints from that same 2024 Dogs Trust UK veterinary analysis: about 13.1 for Border Collie, and about 13.9 for Bearded Collie. Those are medians, not targets. If you have two of those breeds at home, the [breed comparison tool](https://dogyears.info/compare?a=Rough+Collie&b=Border+Collie) puts the ageing tables next to each other. It will not invent a different curve than the size-band maths already on each page. ## Common questions ### How long do Rough Collies live? This site does not publish a breed-specific UK median lifespan for the Rough Collie. Individual dogs vary. The calculator converts the years a dog has already lived. It is not a forecast of how long they will live. A 2024 Dogs Trust study of UK dogs found that larger dogs tended to have shorter lives than smaller ones, and flat-faced breeds shorter lives than dogs with a typical head shape. That pattern is not a lifespan figure for this breed. [Signs your dog is a senior](https://dogyears.info/signs-your-dog-is-a-senior) covers what to watch for as a dog gets older. Source: [Dogs Trust, longevity of UK dog breeds (2024)](https://www.dogstrust.org.uk/about-us/research-expertise/longevity-dog-breeds), reporting McMillan et al., [Scientific Reports](https://doi.org/10.1038/s41598-023-50458-w). ### How old is a 5-year-old Rough Collie in human years? About 36, using The Royal Kennel Club's large-breed guidance as tabulated by Purina UK. That is also the point this site treats as the start of the senior stage for Rough Collies. The ×7 rule would say 35 — close at some ages, then it drifts. ### Why does a Rough Collie count as senior earlier than a small dog? Large breeds reach old age faster than small ones on the Royal Kennel Club tables this site uses. Small breeds are generally treated as senior from around 10 dog years; Rough Collies from around 5. It is a size-band guideline for care and check-ups, not a switch that flips overnight. See [dog life stages explained](https://dogyears.info/dog-life-stages-explained). ### Can I pre-fill the main calculator with Rough Collie? Yes. The homepage applies a shared link when an age is present, so use [Rough Collie at 5 years](https://dogyears.info/?b=Rough%20Collie&a=5) or [7 years](https://dogyears.info/?b=Rough%20Collie&a=7), then change the age if you need a different figure. The widget on this page is the same large-breed maths in a shorter form. ### Get the exact figure, to the month Opens the homepage calculator with Rough Collie selected at 5 years — the start of the senior stage on the large-breed table. Change the age for your own dog. [Open the Rough Collie calculator](https://dogyears.info/?b=Rough%20Collie&a=5) Related reading: [Is the ×7 Rule Real?](https://dogyears.info/dog-years-x7-rule-explained) · [Dog Life Stages Explained](https://dogyears.info/dog-life-stages-explained) · [Signs Your Dog Is Entering Its Senior Years](https://dogyears.info/signs-your-dog-is-a-senior) · [Pet Insurance for Older Dogs](https://dogyears.info/pet-insurance-for-older-dogs) · [Caring for an Ageing Dog](https://dogyears.info/caring-for-an-ageing-dog-uk-guide) Compare: [vs Border Collie](https://dogyears.info/compare?a=Rough+Collie&b=Border+Collie) · [vs Bearded Collie](https://dogyears.info/compare?a=Rough+Collie&b=Bearded+Collie) · [vs Shetland Sheepdog](https://dogyears.info/compare?a=Rough+Collie&b=Shetland+Sheepdog) ![Rough Collie](https://dogyears.info/images/rough-collie.jpg) Photo: Lobstermpa via [Wikimedia Commons]() (CC BY-SA 4.0) ### Got a Rough Collie? Opens the calculator with Rough Collie selected at 5 years. Change the age if you need a different figure. [Open the calculator](https://dogyears.info/?b=Rough%20Collie&a=5) ### Related Breeds [Border Collie](https://dogyears.info/border-collie-dog-years) · [Bearded Collie](https://dogyears.info/bearded-collie-dog-years) · [Shetland Sheepdog](https://dogyears.info/shetland-sheepdog-dog-years) · [Bergamasco](https://dogyears.info/bergamasco-dog-years) · [Catalan Sheepdog](https://dogyears.info/catalan-sheepdog-dog-years) · [Entlebucher Mountain Dog](https://dogyears.info/entlebucher-mountain-dog-dog-years) · [Smooth Collie](https://dogyears.info/smooth-collie-dog-years) · [White Swiss Shepherd Dog](https://dogyears.info/white-swiss-shepherd-dog-dog-years) ```json {"@context":"https://schema.org","@type":"Article","headline":"Rough Collie Life Expectancy and Age Calculator","description":"How long do Rough Collies live? No breed-specific UK median is published on this page. Convert your Rough Collie's age to human years with our free calculator.","url":"https://dogyears.info/rough-collie-dog-years","datePublished":"2026-07-14","dateModified":"2026-10-08","author":{"@type":"Organization","name":"Dog Years"},"publisher":{"@type":"Organization","name":"Dog Years","url":"https://dogyears.info/"},"mainEntityOfPage":{"@type":"WebPage","@id":"https://dogyears.info/rough-collie-dog-years"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://dogyears.info/"},{"@type":"ListItem","position":2,"name":"Guides","item":"https://dogyears.info/guides"},{"@type":"ListItem","position":3,"name":"Rough Collie Life Expectancy and Age Calculator"}]} {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How long do Rough Collies live?","acceptedAnswer":{"@type":"Answer","text":"This site does not publish a breed-specific UK median lifespan for the Rough Collie. Individual dogs vary. The calculator converts the years a dog has already lived. It is not a forecast of how long they will live. A 2024 Dogs Trust study of UK dogs found that larger dogs tended to have shorter lives than smaller ones, and flat-faced breeds shorter lives than dogs with a typical head shape. That pattern is not a lifespan figure for this breed. Signs your dog is a senior covers what to watch for as a dog gets older. Source: Dogs Trust, longevity of UK dog breeds (2024), reporting McMillan et al., Scientific Reports."}},{"@type":"Question","name":"How old is a 5-year-old Rough Collie in human years?","acceptedAnswer":{"@type":"Answer","text":"About 36, using The Royal Kennel Club's large-breed guidance as tabulated by Purina UK. That is also the point this site treats as the start of the senior stage for Rough Collies. The ×7 rule would say 35."}},{"@type":"Question","name":"Why does a Rough Collie count as senior earlier than a small dog?","acceptedAnswer":{"@type":"Answer","text":"Large breeds reach old age faster than small ones on the Royal Kennel Club tables this site uses. Small breeds are generally treated as senior from around 10 dog years; Rough Collies from around 5. It is a size-band guideline for care and check-ups, not a switch that flips overnight."}},{"@type":"Question","name":"Can I pre-fill the main calculator with Rough Collie?","acceptedAnswer":{"@type":"Answer","text":"Yes. The homepage applies a shared link when an age is present, so open dogyears.info with Rough Collie and an age (for example 5 years). The widget on the Rough Collie breed page uses the same large-breed maths."}}]} ```