How to compare the time three chores take

Does laundry usually take longer than meal prep, or did one unusually slow day skew your impression? To compare three recurring chores, time them the same way over several attempts. A stopwatch and a short log can show both the usual duration and how much it changes from day to day.

Use the stopwatch in a phone or computer clock app to measure elapsed time. Then organize your readings in a CSV file with the CSV Editor. You can sort and review the entries in your browser.

Compare the three chores

1. Set up a log. Prepare a CSV with columns for the chore, date, duration in seconds, and notes. Open it in the CSV Editor. Use clear names for the three chores, such as laundry, meal prep, and tidying.
2. Define when each chore starts and ends. For laundry, you might start when you begin sorting and stop when the load is running. For meal prep, start when you begin preparing ingredients and stop when the meal is ready to serve. Use the same boundaries every time.
3. Time each attempt with a stopwatch. Start it when the chore begins and stop it at your chosen endpoint. Record the result right away. For example, write 200 seconds for 3 minutes and 20 seconds.
4. Repeat the measurements. Record each chore at least five times, on different days if possible. Try to include ordinary conditions, not only unusually easy or busy days.
5. Sort and compare the readings. In the CSV Editor, sort by chore and duration to see each set of times together. For each chore, add the readings and divide by the number of attempts to get the average. With five readings, the middle value after sorting is the median.

If you pause a chore to answer a call or wait for something, use the same rule each time: either keep the stopwatch running or pause it, and note the interruption. Otherwise, the measurements may not mean the same thing.

What the results mean

One chore has a higher average and median

That chore usually takes longer in your measured conditions. The average includes every reading, so one very long attempt can pull it up. The median is less affected by an unusual day. If both numbers are higher than the other chores, the difference is likely to be part of your normal routine.

The average is much higher than the median

One or more long attempts may be pulling the average upward. Check the notes for interruptions, missing supplies, or another unusual circumstance. Keep the reading if it was a real attempt, but consider comparing the median as a better picture of a typical day.

One chore has a wider range of times

Look at the shortest and longest readings. A big gap means the chore is less predictable, perhaps because it depends on how much there is to do or whether you need to wait for something. Record those conditions next time so you can separate routine variation from a one-off delay.

The three times are close

A small difference may not matter in practice, especially if it is only a few seconds or less than your timing precision. Collect more attempts before deciding that one chore is reliably faster. Compare the same number of readings for each chore.

Use the right kind of clock

A stopwatch counts upward from zero and measures how long an activity takes. That is the right choice when you want to compare chores with durations you do not know in advance. A countdown timer starts from a set amount of time and alerts you when it runs out. It is useful for limiting a chore, but it does not tell you how long the chore would have taken to finish.

For accurate comparisons, keep the timing method consistent. A phone stopwatch is easy to start and stop while moving around. If you use a computer, make sure the clock stays visible and does not go to sleep during a longer task. Avoid switching between manual timing and a countdown timer halfway through your log.

The CSV Editor works in your browser, and the CSV file stays on your device. Save a copy of your log so you can add more measurements later.