Free Age Calculator 2026 — calculate your exact age from date of birth in years, months, days, hours & seconds. Includes Korean age, dog age converter, age difference, birthday countdown, zodiac sign, birthstone, and US school enrollment eligibility.
Free calculators for age, date differences, working hours, day counting, time durations, and more
Age calculation follows calendar date-difference logic, accounting for leap years and varying month lengths. Here is exactly how the result is computed:
Compare your birth date with today's date
Calculate complete years elapsed (if March 15 birthday and today is Jan 10, the current year is not yet complete — use previous year count)
Subtract full years, then count remaining complete months
Subtract full months, then count remaining days within the current month
Adjust automatically for leap years (Feb 29 birthdays handled per ISO 8601 standard)
Multiply total days by 24 for hours, by 1,440 for minutes, by 86,400 for seconds
Example Calculation
Born March 15, 1990 → Age on January 10, 2026 = 35 years, 9 months, 26 days. Since March 15 has not yet passed in 2026, a full year is not added. Total days alive: ~13,088.
Age represents the time elapsed since birth, typically measured in years. However, your exact age encompasses years, months, and days — providing precision for legal requirements, school enrollment, medical records, visa applications, and personal milestones.
Your age in its simplest form is how many complete years you have lived. For precision — school enrollment, visa applications, Medicare eligibility, retirement planning — your exact age includes months and days. This calculator provides all three instantly, plus your age in weeks, hours, minutes, and live seconds.
Parents frequently need a child's exact age for school admission requirements, vaccination schedules (CDC immunization schedule is age-specific to the month), developmental milestone tracking, and medical forms. Understanding a child's precise age in years, months, and days helps ensure timely health checkups and legal compliance with enrollment requirements.
Quick reference table: find your age in 2026 based on your birth year. The range shows your age before and after your birthday this year.
| Birth Year | Age in 2026 | Generation |
|---|---|---|
| 2021 | 4–5 | Gen Alpha |
| 2016 | 9–10 | Gen Alpha |
| 2011 | 14–15 | Gen Z |
| 2006 | 19–20 | Gen Z |
| 2001 | 24–25 | Gen Z |
| 1996 | 29–30 | Millennials |
| 1990 | 35–36 | Millennials |
| 1985 | 40–41 | Millennials |
| 1980 | 45–46 | Gen X |
| 1975 | 50–51 | Gen X |
| 1970 | 55–56 | Gen X |
| 1965 | 60–61 | Gen X |
| 1960 | 65–66 | Baby Boomers |
| 1955 | 70–71 | Baby Boomers |
| 1950 | 75–76 | Baby Boomers |
| 1945 | 80–81 | Silent Generation |
Age range = before birthday / after birthday in 2026. Use the calculator above for your exact age in years, months, and days.
The Korean age system (also called East Asian age or traditional age) is fundamentally different from the Western system. Understanding the difference matters for Korean dramas, K-pop fan communities, and anyone dealing with South Korean documents or culture.
Quick Formula
Korean Age = Current Year − Birth Year + 1
Example: Born in 1995, current year 2026 → Korean Age = 2026 − 1995 + 1 = 32. Western age would be 30 or 31 depending on whether your birthday has passed.
The popular "multiply by 7" rule for dog age is scientifically inaccurate. A 2020 study published in the journal Cell Systems (Wang et al.) used DNA methylation analysis to map dog aging to human aging — and found that dogs age much faster early in life and more slowly as they mature.
| Dog Age | Human Equivalent (Scientific) | Old "×7 Rule" |
|---|---|---|
| 1 years | ~31 human years | 7 (inaccurate) |
| 2 years | ~42 human years | 14 (inaccurate) |
| 3 years | ~49 human years | 21 (inaccurate) |
| 5 years | ~58 human years | 35 (inaccurate) |
| 7 years | ~62 human years | 49 (inaccurate) |
| 10 years | ~68 human years | 70 (inaccurate) |
| 15 years | ~74 human years | 105 (inaccurate) |
Source: Wang et al., "Quantitative Translation of Dog-to-Human Aging by Conserved Remodeling of the DNA Methylome," Cell Systems, 2020. Formula applies to medium-sized dogs; very large breeds age faster.
To enroll in kindergarten in the United States, your child must turn 5 on or before a specific cutoff date. This date varies significantly by state — a child born on September 2nd would be eligible in most states that year, but not in states with a September 1st cutoff. Use the table below to verify your child's eligibility.
| State | Kindergarten Cutoff Date |
|---|---|
| Alabama | September 1 |
| Alaska | September 1 |
| Arizona | September 1 |
| Arkansas | September 15 |
| California | September 1 |
| Colorado | October 1 |
| Connecticut | January 1 |
| Delaware | August 31 |
| Florida | September 1 |
| Georgia | September 1 |
| Hawaii | July 31 |
| Idaho | September 1 |
| Illinois | September 1 |
| Indiana | August 1 |
| Iowa | September 15 |
| Kansas | August 31 |
| Kentucky | October 1 |
| Louisiana | September 30 |
| Maine | October 15 |
| Maryland | September 1 |
| Massachusetts | Varies |
| Michigan | December 1 |
| Minnesota | September 1 |
| Mississippi | September 1 |
| Missouri | August 1 |
| Montana | September 10 |
| Nebraska | October 15 |
| Nevada | September 30 |
| New Hampshire | September 30 |
| New Jersey | October 1 |
| New Mexico | September 1 |
| New York | December 1 |
| North Carolina | August 31 |
| North Dakota | August 1 |
| Ohio | August 1 |
| Oklahoma | September 1 |
| Oregon | September 1 |
| Pennsylvania | September 1 |
| Rhode Island | September 1 |
| South Carolina | September 1 |
| South Dakota | September 1 |
| Tennessee | September 30 |
| Texas | September 1 |
| Utah | September 1 |
| Vermont | January 1 |
| Virginia | September 30 |
| Washington | August 31 |
| West Virginia | September 1 |
| Wisconsin | September 1 |
| Wyoming | September 15 |
Which generation do you belong to? Each generation is defined by shared historical experiences, cultural touchstones, and economic conditions. Here is how old each generation is in 2026:
The first generation born entirely in the smartphone era. Growing up with AI assistants and touchscreens from birth.
Digital natives who experienced 9/11's aftermath in childhood, the 2008 recession in youth, and came of age during COVID-19.
Grew up with the early internet, graduated into the 2008 financial crisis. The most educated generation in US history.
The 'latchkey' generation. Grew up with MTV, personal computers, and the end of the Cold War.
Born after WWII during the economic and population boom. Witnessed the Civil Rights Movement, space race, and Vietnam.
Grew up during the Great Depression and WWII. Known for civic duty, conformism, and the foundation of modern institutions.
Approximately 1 in 1,461 people are born on February 29 — a Leap Day. This creates unique questions about legal age, birthday celebration, and milestone calculations.
Most US states treat February 28 as the legal birthday in non-leap years. So a person born Feb 29, 2000 legally turns 21 on February 28, 2021.
Exception: Some jurisdictions (UK, Hong Kong) use March 1 as the non-leap year birthday.
The odds of being born on February 29 are approximately 1 in 1,461 (0.068%). There are roughly 5 million "leaplings" worldwide.
Famous leaplings: Tony Robbins (born Feb 29, 1960), Ja Rule (born Feb 29, 1976).
Each planet in our solar system orbits the Sun at a different speed. "One year" on Mars takes 687 Earth days. So if you were born 10,000 days ago, you have only completed 14.6 Martian orbits — making you 14 years old on Mars.
| Planet | Earth Days per Year | If you're 30 on Earth, you're... |
|---|---|---|
| Mercury ☿ | 87.97 | ~124 years |
| Venus ♀ | 224.7 | ~49 years |
| Mars ♂ | 686.97 | ~16 years |
| Jupiter ♃ | 4,332.6 | ~2.5 years |
| Saturn ♄ | 10,755.7 | ~1 year |
Orbital periods sourced from NASA Solar System Exploration. Use the "On Planets" tab in the calculator above to find your own planetary ages.
No Login Required
No Data Stored
Browser-Based
Updated for 2026
Calculation Method
Age is determined using standard calendar date-difference logic per ISO 8601, accounting for leap years, varying month lengths, and real-world calendar rules.
Accuracy & Reliability
Results are accurate to the day. Live seconds counter updates every second. All calculations follow widely accepted date arithmetic used in legal, medical, and educational contexts.
Privacy Assurance
All calculations run entirely in your browser. No date of birth or personal information is stored, transmitted, or shared with any server.
Verified Calculation Logic
Developed and maintained by Raviraj Bhosale. Calculation logic is cross-verified against ISO 8601 date standards and NIST time and frequency references.
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If you were born in 1990, you are 35 years old in 2026 if your birthday has already passed, or 34 years old if your birthday is still to come this year. Enter your exact birth date in the calculator above for years, months, and days.
Korean age starts at 1 at birth (not 0), and everyone gains a year on January 1st — not on their birthday. So your Korean age is typically 1-2 years higher than your Western age. Formula: Korean Age = Current Year − Birth Year + 1. Switch to the 'Korean Age' tab in the calculator to see yours instantly.
The modern scientific formula (PNAS 2020) is: Dog Age = 16 × ln(human age) + 31. This is more accurate than the old 'multiply by 7' rule. A 1-year-old dog is equivalent to about 31 human years; a 10-year-old dog is about 68 human years. Use the 'Dog Age' tab to calculate yours.
Your chronological age is the exact time elapsed from your birth to today, measured in years, months, and days. It is the standard used for all legal purposes — school enrollment, driving license, voting age, Medicare eligibility, retirement, and visa applications.
Most US states use September 1 as the kindergarten cutoff date — your child must turn 5 on or before September 1. However, some states differ significantly: New York uses December 1, Connecticut uses January 1, Michigan uses December 1, and Hawaii uses July 31. See the full state-by-state table above.
In 2026, Generation Z (born 1997–2012) are aged 14–29. Millennials (born 1981–1996) are aged 30–45. Generation X (born 1965–1980) are aged 46–61. Baby Boomers (born 1946–1964) are aged 62–80.
A biological age calculator estimates how old your body appears based on health biomarkers — telomere length, cardiovascular fitness, metabolic rate, and genetics. It is different from chronological age (time since birth). For legal or official purposes, always use your chronological age.
You can claim reduced Social Security benefits at age 62. Full retirement age (FRA) is 67 for anyone born in 1960 or later, and 66 years and 2 months to 66 years and 10 months for those born 1955–1959. Delaying until age 70 maximizes your monthly benefit by approximately 8% per year of delay.
This calculator is accurate to the day, using ISO 8601-compliant date arithmetic. Leap years and varying month lengths are handled automatically. The live seconds counter is accurate to the second. All calculations run locally in your browser — no data is stored.
Mars takes 686.97 Earth days to complete one orbit around the Sun. To find your age on Mars, divide your total days alive by 686.97. If you are 30 years old on Earth (roughly 10,957 days), you are about 15.96 Martian years old. Use the 'On Planets' tab in the calculator to see your age on Mercury, Venus, Mars, Jupiter, and Saturn.
Enter your date of birth to calculate your exact age
Enter your date of birth above to see your age
Enter your date of birth above to see your Korean age
Enter your date of birth above to see your dog age
Enter your date of birth above to see your age on other planets