🐶 狗狗年龄换算（相当于人类几岁）Dog Age Calculator (Dog Years to Human Years)
把狗狗年龄换算成相当于人类的年龄：同时给出按体型的兽医经验法（第 1 年 ≈ 15 岁、第 2 年 ≈ 24 岁，之后小型犬每年约 +4、大型犬约 +6）和 2020 年基于 DNA 甲基化的研究公式 16·ln(狗龄) + 31。Convert your dog's age to human years using the vet rule of thumb by size (year one ≈ 15, year two ≈ 24, then about +4 a year for small dogs up to +7 for giants) and the 2020 DNA-methylation formula 16·ln(age) + 31.
使用说明与常见问题How-to & FAQ
「狗狗年龄换算（相当于人类几岁）」是什么？What is the Dog Age Calculator (Dog Years to Human Years) tool?
把狗狗年龄换算成相当于人类的年龄：同时给出按体型的兽医经验法（第 1 年 ≈ 15 岁、第 2 年 ≈ 24 岁，之后小型犬每年约 +4、大型犬约 +6）和 2020 年基于 DNA 甲基化的研究公式 16·ln(狗龄) + 31。Convert your dog's age to human years using the vet rule of thumb by size (year one ≈ 15, year two ≈ 24, then about +4 a year for small dogs up to +7 for giants) and the 2020 DNA-methylation formula 16·ln(age) + 31.
如何使用「狗狗年龄换算（相当于人类几岁）」？How do I use the Dog Age Calculator (Dog Years to Human Years) tool?
在「狗狗年龄换算（相当于人类几岁）」中，填写「狗狗年龄（岁）」、「另加月数」、「体型（成年体重）」等参数，结果会随输入实时计算并显示在下方。In the Dog Age Calculator (Dog Years to Human Years): Fill in "Dog age (years)", "Extra months", "Size (adult weight)"; results are recalculated instantly as you type.
狗龄乘以 7 对吗？Is it really dog years × 7?
不准确。狗在头两年成熟得很快：美国兽医协会（AVMA）针对中型犬的经验法是：第 1 年约等于人类 15 岁，第 2 年再加约 9 岁，之后每年约 4–5 岁。体型越大衰老越快，本工具按体型每年 +4（小型）、+5（中型）、+6（大型）、+7（巨型），这些增量和进入老年期的年龄（小型 10、中型 8、大型 7、巨型 6 岁）都是常见经验值（示例值）。AAHA《2019 犬生命阶段指南》把老年期定义为预期寿命的最后 25%。Not really. Dogs mature fast in the first two years. The AVMA rule of thumb for a medium-sized dog is about 15 human years for year one, about 9 more for year two, then about 4–5 a year. Bigger dogs age faster: the tool adds 4 (small), 5 (medium), 6 (large) or 7 (giant) a year, and these steps and the senior ages (small 10, medium 8, large 7, giant 6) are common rules of thumb (example values). The 2019 AAHA Canine Life Stage Guidelines define the senior stage as the last 25% of expected lifespan.
DNA 甲基化公式是什么？What is the DNA-methylation formula?
加州大学圣地亚哥分校 Wang 等人 2020 年在 Cell Systems 发表的研究，比较拉布拉多犬与人的表观遗传时钟，得出 人类年龄 ≈ 16 × ln(狗龄) + 31。它基于单一犬种，只适用于 1 岁以上。A 2020 Cell Systems study by Wang et al. (UC San Diego) compared the epigenetic clocks of Labradors and people and found human age ≈ 16 × ln(dog age) + 31. It is based on one breed and applies from age 1.
为什么大型犬老得快？Why do big dogs age faster?
大型和巨型犬寿命通常比小型犬短几年，进入老年期也更早（约 6–7 岁，小型犬约 10 岁）。Large and giant breeds usually live several years less than small breeds and become seniors earlier — around 6–7 versus about 10 for small dogs.
结果可以代替医生的建议吗？Can this replace medical advice?
不能。「狗狗年龄换算（相当于人类几岁）」基于常用公式给出估算，个体差异较大，如有健康问题请咨询医生或专业人士。No. The Dog Age Calculator (Dog Years to Human Years) gives estimates from common formulas; individuals differ, so consult a doctor or professional for health decisions.
「狗狗年龄换算（相当于人类几岁）」免费吗？需要注册吗？Is the Dog Age Calculator (Dog Years to Human Years) free? Do I need an account?
「狗狗年龄换算（相当于人类几岁）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Dog Age Calculator (Dog Years to Human Years) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.