Quick Duration Facts: How Long 14 Everyday Things Actually Take

Some durations are exact — a movie’s runtime, a flight’s scheduled time. Others are honestly a range, and pretending otherwise just gives you a wrong number with false confidence.

This roundup covers 14 commonly searched “how long does X take” questions. Each answer uses real figures and honest ranges where a single number would mislead.

Quick reference

How long is a tennis match?

There’s no single answer, because format changes everything. Men’s Grand Slam matches run best-of-five sets and average around 2 hours 45 minutes, according to ATP-tracked data.

Women’s matches run best-of-three at every tournament, including majors. They typically take 1.5 to 2 hours. Regular ATP and WTA tour matches outside the majors run shorter still, closer to 1.5 hours on average.

The longest match ever recorded blows past typical numbers entirely. The 2010 Wimbledon first-round match between John Isner and Nicolas Mahut ran 11 hours and 5 minutes across three days. The final-set score was 70-68.

How long is barber school?

This one genuinely depends on the state. Barber licensing programs in the US typically require between 1,000 and 1,500 clock hours of training before a student can sit for a state licensing exam. Those figures come from state cosmetology and barber boards.

At a full-time schedule of around 30 to 35 hours a week, that works out to roughly 9 to 15 months. Part-time students take considerably longer, and a few states set requirements outside this typical range entirely.

How long is wisdom teeth surgery?

For a straightforward extraction of all four wisdom teeth, oral surgeons typically estimate 45 minutes to 2 hours. The actual time depends on how impacted the teeth are and whether any sit below the gumline.

A single, fully erupted wisdom tooth can come out in minutes. A deeply impacted tooth that needs cutting through bone takes considerably longer.

Recovery runs on a separate timeline. Expect 3 to 4 days for the worst of the swelling and soreness, and up to two weeks for full healing.

How long is 120 minutes?

That’s exactly 2 hours — a straightforward conversion, but a useful one to anchor. Two hours sits close to the average runtime of a modern theatrical film, which typically runs 100 to 130 minutes.

It’s also just short of the world record marathon time. Kelvin Kiptum ran 2:00:35 at the 2023 Chicago Marathon, the fastest marathon ever officially recorded at the time.

How long is a round of golf?

A full 18-hole round typically takes 4 to 4.5 hours for a foursome playing at a public course. That figure comes from pace-of-play guidelines used by the USGA and most course operators.

A twosome playing without carts can finish faster, sometimes in 3 to 3.5 hours. A slow, crowded weekend round can stretch past 5 hours. Nine holes runs close to half that: roughly 2 to 2.25 hours.

How long does a standard haircut take?

A basic trim or cut at most barbershops and salons runs 30 to 45 minutes. The exact time varies with hair length and the complexity of the style.

Add a wash, color, or more elaborate styling, and the appointment easily stretches to an hour or more. Color services alone commonly take 1.5 to 3 hours depending on the technique.

How long is a driver’s education course?

Most US states that require formal driver’s ed for new teen drivers set the classroom portion at around 30 hours. That pairs with roughly 6 hours of behind-the-wheel instruction with a certified instructor.

These figures come from commonly cited state DMV requirements, though exact hour minimums vary by state. Online classroom formats have become common alongside in-person options, but the behind-the-wheel hours still generally require an in-person instructor.

How long is a CPR certification class?

A basic CPR/AED certification course through organizations like the American Heart Association or the Red Cross typically runs 4 to 6 hours in person.

A shorter session, around 2 hours, works if a student completes an online knowledge portion beforehand and only needs an in-person skills check. Certifications generally need renewal every two years.

How long is the SAT?

As of the digital format rolled out in 2024, the SAT takes 2 hours and 14 minutes. That’s a significant cut from the old paper-based test’s roughly 3-hour length. With the optional essay, back before College Board dropped it in 2021, the paper test ran 3 hours 50 minutes.

The shorter digital format also adjusts question difficulty based on performance in real time. That’s a change from the fixed-question paper version.

How long is a marathon?

The distance is fixed at 26.2 miles, but finish times vary enormously. The average marathon finisher in the US completes the race in roughly 4 hours 30 minutes to 5 hours. That range comes from data commonly reported by race-timing organizations like RunSignUp and MarathonHandbook.

Elite runners finish in a fraction of that time. The men’s world record, set by Kelvin Kiptum in 2023, stands at 2:00:35. The women’s world record, set by Ruth Chepngetich in 2024, stands at 2:09:56.

How long does an oil change take?

A standard oil change at a quick-lube shop or dealership service center typically takes 30 to 45 minutes. That assumes no additional issues turn up during the inspection most shops include.

Doing it yourself at home usually takes about the same amount of time. Factor in warming up the engine, draining the old oil, and disposing of it properly.

How long is a Super Bowl broadcast?

Count the pregame lead-in, the game itself, and the halftime show, and a Super Bowl broadcast typically runs about 3.5 to 4 hours on network TV. That’s despite the NFL’s own game clock running just 60 minutes.

The extended runtime comes from commercial breaks. Super Bowl ad slots are famously expensive, so there are a lot of them. Add instant-replay reviews and the roughly 12-to-13-minute halftime show, and the hours add up fast.

How long is a college class period?

This varies more than almost anything else on this list, by institution and format. A standard lecture period commonly runs 50 minutes for a class that meets three times a week. A class that meets just twice a week usually runs 75 to 80 minutes instead.

That’s a scheduling convention many US universities use to hit the same total weekly contact hours either way. Graduate seminars and lab sections often run longer, sometimes a full 3 hours in a single weekly block.

How long is a flight from New York to Los Angeles?

A nonstop flight between the two coasts typically takes 5 hours 30 minutes to 6 hours westbound, from New York to LA. Eastbound, from LA to New York, it runs slightly less — around 5 hours to 5 hours 15 minutes. The jet stream gives eastbound flights a tailwind boost.

Scheduled block times vary slightly by airline and route. But this range covers what most major carriers publish for the route.

How long does it take to hard-boil an egg?

For a fully set yolk, most cooking guides recommend simmering eggs 10 to 12 minutes after the water reaches a boil. USDA food safety guidance backs the same range. Transfer the eggs straight to an ice bath afterward to stop the cooking.

Nine minutes gets a firmer but still slightly soft-centered yolk. Pushing past 12 minutes tends to overcook the yolk and give it that grayish-green ring some people associate with old-fashioned hard-boiled eggs.

How long is a movie trailer?

The Motion Picture Association’s guidelines cap standard theatrical trailers at 2 minutes and 30 seconds. Studios have followed this limit since the 1970s specifically to keep pre-show runtimes manageable.

Teaser trailers, released earlier in a marketing campaign, usually run shorter still — often 60 to 90 seconds.

How long is a standard bag of microwave popcorn?

Most microwave popcorn packaging lists a cook time of 2 to 4 minutes. The exact number depends on the microwave’s wattage and the specific brand’s kernel-to-bag ratio.

That’s also why most bags recommend listening for the pop rate to slow instead of trusting a fixed timer. When pops slow to roughly 2 to 3 seconds apart, pull the bag. Microwaves vary enough that a fixed time can scorch a batch in a stronger oven.

Why ranges beat false precision

It’s tempting to want one clean number for everything. But a lot of real-world durations genuinely don’t have one.

A wisdom tooth extraction depends on how impacted the tooth is. A golf round depends on how crowded the course is. A marathon finish depends entirely on the runner.

Giving a single average in these cases isn’t more useful than a range. It’s just less honest about how much the real answer varies from person to person and day to day.

When you see an exact-sounding number for something like “how long is wisdom teeth surgery,” treat it with some skepticism. Check whether the source also tells you what kind of case that number assumes.

The takeaway

A few of these numbers are exact by design. 120 minutes is always 2 hours, and the SAT’s current time limit is fixed by College Board policy.

Most of the rest are honest ranges shaped by real variables. How impacted a tooth is, how crowded a golf course is, which state licenses barbers — each of those changes the answer. Where this list gives a range instead of a single number, that’s not vagueness. It’s the accurate answer.

Frequently Asked Questions

How long is a tennis match on average?
It depends heavily on format. Men’s best-of-five majors average around 2 hours 45 minutes. Women’s best-of-three matches average 1.5 to 2 hours, and regular tour-level matches run shorter still.

How long is barber school in total?
Typically 1,000 to 1,500 clock hours. That works out to roughly 9 to 15 months of full-time study, though the exact figure depends on the state’s licensing board.

Is wisdom teeth surgery always 2 hours?
No. Two hours is the upper end of a typical range. A simple extraction of an already-erupted tooth can take just minutes.

How long is 120 minutes compared to a movie?
Almost exactly the length of an average modern feature film. Modern films typically run 100 to 130 minutes.

Why doesn’t the SAT take 3 hours anymore?
College Board moved to a shorter, adaptive digital format in 2024. That cut total time to 2 hours 14 minutes and dropped the optional essay for good.

How long does a full round of golf really take?
For a typical foursome, 4 to 4.5 hours is standard. A fast twosome can finish in 3 to 3.5 hours, and a crowded weekend course can push a round past 5 hours.

How long should you boil an egg for a hard yolk?
Simmer for 10 to 12 minutes after the water reaches a boil, then move straight to an ice bath. That’s the range most food-safety guides recommend for a set yolk.

How long is a movie trailer allowed to be?
The Motion Picture Association caps standard theatrical trailers at 2 minutes 30 seconds. Studios have followed this rule since the 1970s.