Your phone counts steps. The federal activity guidance counts minutes. To connect the two, time one brisk walk, see how many steps it added, and use that as your own conversion rate. This page goes through that in five steps, with a made-up example, so you can read a week of step counts as minutes toward the 150 that CDC lists for adults.
This is general information, not medical advice. Guidance pages and links were checked on November 15, 2026.
The guidance is written in minutes
CDC’s overview for adults states the weekly figure this way: “Adults need at least 150 minutes of moderate-intensity physical activity a week, such as 30 minutes a day, 5 days a week.” It adds that adults also need 2 days of muscle-strengthening activity each week, which a step counter doesn’t measure at all.
None of the agency pages we opened for this article gives a daily step target, so you won’t find one here. What we did find is a mention of the tool. The National Institute on Aging, on a page written for older adults, says of tracking activity: “You can use a device (for example, a step counter) or keep a written log.”
So the counter is a fine way to keep a record. It just records in a different unit from the one the guidance uses.
Only some steps are the kind the 150 measures
The 150 minutes are moderate-intensity activity. CDC’s page on measuring intensity lists “Walking briskly (2.5 miles per hour or faster)” among its examples and gives a rule of thumb for telling: “a person doing moderate-intensity aerobic activity can talk, but not sing, during the activity.” It also describes moderate effort as “a level of effort of 5 or 6 on a scale of 0 to 10.”
A step counter can’t tell the difference. The slow steps between the desk and the printer land in the same total as the steps of a brisk walk to the train. That’s why dividing a whole day’s count by some number gives a figure that looks precise and isn’t.
Find your own brisk-walk number
You’ll need your phone or step counter, a timer, and a flat route you can walk for ten minutes without stopping at a crosswalk.
- Write down the step count before you start.
- Start the timer and walk at a pace where you could talk but not sing.
- At ten minutes, stop and write down the count again.
- Subtract the first number from the second, then divide by 10. That’s your steps per brisk minute.
- Do it again on another day and keep the lower of the two results, so the estimate leans toward undercounting.
The number is yours alone. Leg length, shoes and the route all change it, which is why a figure borrowed from an article or a friend doesn’t transfer.
A worked example
Everything in this example is made up to show the arithmetic. The step counts and minutes aren’t from any agency and aren’t a suggestion for anyone.
Say the counter read 2,140 before the timed walk and 3,290 after it. That’s 1,150 steps in ten minutes, or 115 steps per brisk minute. Now look at one week, counting only the walks that were brisk on purpose:
| Day | Whole-day steps | Brisk walks that day | Steps in those walks | Minutes (steps ÷ 115) |
|---|---|---|---|---|
| Monday | 7,900 | To the train and back | 2,300 | 20 |
| Tuesday | 6,800 | None | 0 | 0 |
| Wednesday | 5,900 | After lunch | 1,150 | 10 |
| Thursday | 8,400 | Evening loop | 3,450 | 30 |
| Friday | 6,100 | After lunch | 1,150 | 10 |
| Saturday | 9,700 | Park loop | 4,600 | 40 |
| Sunday | 5,200 | None (slow errands) | 0 | 0 |
| Week | 50,000 | 12,650 | 110 |
Two things stand out. Tuesday had more steps than Wednesday and no brisk minutes at all. And if this person had divided the whole week’s 50,000 steps by 115, the answer would have been about 435 minutes, almost four times the 110 that were actually brisk.
Reading the week
The assumed week comes to 110 minutes, 40 short of 150. CDC’s wording on how the total can be reached is flexible: “You can spread your activity out during the week and break it up into smaller chunks of time.” Its page on adding activity says, “The 150 minutes can be broken up.” In this example, the gap is the size of two more 20-minute walks, or four 10-minute ones.
A week that falls short isn’t a failed week in CDC’s telling either. The overview says, “Some physical activity is better than none.”
If you’d rather keep the minutes on paper next to other kinds of activity, our one-week tracking sheet has columns for that. And if a short walk on workdays is where you’d start, see how to put a 10-minute walk after lunch on the calendar.
When to stop, and who to ask first
MedlinePlus says: “If you haven’t exercised in a while, start slowly and talk to your provider if you have health concerns. If you don’t feel right, or have any pain, extreme shortness of breath, or dizziness, stop exercising and seek help right away.”
CDC’s page on adding activity as an adult says: “Physical activity that requires moderate effort is safe for most people. But if you have a chronic health condition, be sure to talk with your doctor about the types and amounts of physical activity that are right for you.” The same section tells people who have been inactive or have a disability, among others, to talk to a doctor before starting vigorous-intensity activity.
What trips people up
- Dividing the whole day’s steps by the brisk rate. Most of a day’s steps are slow ones.
- Reading the goal a device ships with as agency guidance. The pages we opened set minutes, not steps.
- Measuring once and never again. New shoes, a hillier route or winter clothes change the rate, so it’s worth re-timing every few months.
- Counting a walk as brisk after the fact. The talk test works during the walk, not from memory that evening.
- Leaving the phone on the desk. Steps it didn’t carry aren’t in the total, so a written note of the walk is the backup.
Sources
- Centers for Disease Control and Prevention, Adult Activity: An Overview (December 20, 2023): the 150 minutes, 2 days of muscle-strengthening, spreading activity out
- Centers for Disease Control and Prevention, How to Measure Physical Activity Intensity (December 4, 2025): brisk walking, the talk test, the 0-to-10 effort scale
- Centers for Disease Control and Prevention, Adding Physical Activity as an Adult (December 4, 2025): breaking up the 150 minutes, when to check with a doctor
- National Institute on Aging, Tips for Getting and Staying Active as You Age (content reviewed January 14, 2025): a step counter or a written log for tracking
- MedlinePlus, National Library of Medicine, Exercise and Physical Fitness (last updated September 15, 2025): starting slowly and when to stop