FREE TIMER · INTERVAL CHIMES · 6-WEEK PLAN
Walking workout timer: Japanese walking, 6-6-6 and 12-3-30
Free walking interval timer for Japanese walking (3 min slow, 3 fast), the 6-6-6 walk and the 12-3-30 treadmill workout, with chimes and a 6-week plan.
Walking interval timer
Warm-up — easy pace
6:00
Start slowly and let your breathing settle.
Treadmill: 12% incline · 3.0 mph · 30 min
Keep this page open while you walk: a chime and a buzz mark each change of pace. On iPhone, turn off silent mode to hear it.
Your last 7 days
Finish a session to start your streak.
The short answer
A walking workout timer tells you when to change pace so you never watch the clock. Japanese walking alternates 3 minutes slow and 3 minutes fast for 5 rounds (30 minutes). The 6-6-6 walk is 6 minutes easy, 60 brisk and 6 easy. 12-3-30 is 30 minutes at a 12% treadmill incline and 3 mph.
How to use the walking workout timer
- Pick a method. Japanese walking for intervals, 6-6-6 for one long brisk walk, 12-3-30 for the incline treadmill workout, or Custom for your own warm-up, intervals and cool-down.
- Choose your level. Fewer sets, a shorter brisk walk or a lower incline are all fine for the first weeks.
- Press Start and put the phone away. A rising chime means speed up, a falling chime means slow down, and a short countdown warns you 3 seconds before each change.
- Glance when you want to. The big numbers show the time left in this part, with the next part and the total time left underneath.
- Finish the session. It is added to your last 7 days and your streak, in this browser only.
Japanese walking vs 6-6-6 vs 12-3-30
| Method | One session | How often | Where | Good for |
|---|---|---|---|---|
| Japanese walking | 5 × (3 min slow + 3 min fast) = 30 min | 4 or more days a week in the studies | Anywhere | Short on time, wants to build fitness |
| 6-6-6 walking | 6 min easy + 60 min brisk + 6 min easy = 72 min | 6 days a week | Outdoors or treadmill | A daily routine with a fixed time |
| 12-3-30 | 30 min at a 12% incline and 3 mph | Often 3 to 5 days a week | Treadmill | Hard work at a walking pace, indoors |
All three are brisk walking at heart. Any of them can cover the 150 minutes of moderate activity a week that the CDC recommends for adults; add muscle-strengthening work on 2 days a week for the rest of the guidelines. Not sure walking is enough on its own? Read is walking enough exercise.
How fast is fast? The talk test
You do not need a heart rate monitor. The CDC talk test works on any walk: at a moderate pace you can talk but not sing, and at a vigorous pace you cannot say more than a few words without pausing for breath (CDC). Brisk walking starts at about 2.5 mph (4.0 km/h).
| Part | How it should feel | Talk test |
|---|---|---|
| Slow, warm-up, cool-down | Easy, relaxed | Full sentences, could hum a song |
| Brisk walk (6-6-6) | Working, but steady for an hour | Can talk, cannot sing |
| Fast (Japanese walking) | Somewhat hard for 3 minutes | Short phrases only |
| Incline walk (12-3-30) | Hard, legs and lungs both working | Short phrases; slow down if you can only gasp |
Treadmill settings in mph and km/h
| Level | Incline | Speed | Time |
|---|---|---|---|
| Starter | 6% | 2.5 mph · 4.0 km/h | 20 min |
| Build | 9% | 2.8 mph · 4.5 km/h | 25 min |
| Classic | 12% | 3.0 mph · 4.8 km/h | 30 min |
The classic 12-3-30 is 12%, 3 mph (about 4.8 km/h) and 30 minutes. For Japanese walking on a treadmill, many people start around 2.0 to 2.5 mph (3.2 to 4.0 km/h) for the slow part and 3.5 to 4.0 mph (5.6 to 6.4 km/h) for the fast part; use the talk test, not the number, to set your own speeds. Want distances too? The steps to miles calculator turns your steps and pace into miles and kilometers.
A 6-week plan for each method
Press Print 6-week plan above for a one-page plan for the method you picked, with a box to tick for every day. Each plan adds one thing at a time:
- Japanese walking: 3 sets on 3 days in week 1, 5 sets on 4 days by week 4. In the research, gains came mainly from the fast minutes and leveled off above about 50 fast minutes a week (Masuki et al., 2019).
- 6-6-6: 6-20-6 on 4 days in week 1, growing to the full 6-60-6 on 6 days by week 6.
- 12-3-30: 4% incline for 15 minutes in week 1, the full 12% for 30 minutes by week 6.
Stay safe on intervals and inclines
Walking is low risk for most people, but fast intervals and steep inclines ask more of your heart, knees, hips and calves. Start at an easy level and add one thing at a time. On a treadmill, use the safety clip and keep your hands off the rails: if you need to hold on, lower the incline or the speed (Cleveland Clinic). Stop if you feel chest pain, dizziness or unusual shortness of breath. If you have a heart, lung, joint or balance condition, are pregnant or have not been active for a long time, check with your doctor before you start.
Make walking a daily habit
A timer gets you through one walk; a routine gets you out the door tomorrow. The 30-day walking habit plan ties your walk to something you already do, you can build a walking plan around your own day, and the exercise guides cover how many steps a day to walk and how to start exercising when you are out of shape.
Frequently asked questions
How do I use this timer for Japanese walking?
Choose Japanese walking, keep 5 sets and press Start. A falling chime starts each slow part and a rising chime each fast part, and the screen shows the current pace, the next one and the total time left. You can start with fast instead of slow, or set 3 to 10 sets.
How fast is the fast part of Japanese walking?
In the original research, fast walking was about 70% of each person's peak aerobic capacity and slow walking about 40%. In practice, fast should feel hard enough that you can only talk in short phrases, and slow should feel easy enough to chat.
Can I do the 6-6-6 walk if 60 minutes is too long?
Yes. Pick a 20, 30 or 45-minute main walk, such as 6-20-6, and add time over a few weeks. The printable 6-week plan starts at 6-20-6 on 4 days and reaches 6-60-6 on 6 days by week 6.
What does 3 mph mean in km/h for 12-3-30?
3 mph is about 4.8 km/h. Switch the speed unit to km/h and the timer shows every speed in km/h. On a treadmill that only shows km/h, set 4.8 for the classic 12-3-30.
Will the timer work with my phone screen off?
Keep the page open on screen. The timer keeps the screen awake where the browser allows it, and the countdown follows the clock, so it stays right in a background tab, but many phones pause sound when the screen locks. On iPhone, turn off silent mode to hear the chimes.
Is my walking log saved?
Yes, in this browser only. Each finished session adds its minutes to the last 7 days and your streak of days in a row. Your settings are remembered too. Nothing is sent to our server.
Is interval walking safe for everyone?
Brisk walking is safe for most people, but faster intervals and steep inclines work the heart and joints harder. If you have a heart, lung, joint or balance condition, are pregnant or have not been active for a long time, check with your doctor and start with the easier levels.
Sources and evidence
- Nemoto et al. (2007): Effects of high-intensity interval walking training on physical fitness and blood pressure in middle-aged and older people, Mayo Clinic Proceedings — In 246 adults (mean age 63), 5 months of alternating 3 minutes of slow (about 40% of peak aerobic capacity) and 3 minutes of fast walking (70% or more), 5 or more sets on 4 or more days a week, raised thigh strength and peak aerobic capacity and lowered systolic blood pressure more than moderate continuous walking.
- Masuki, Morikawa and Nose (2019): High-intensity walking time is a key determinant to increase physical fitness after interval walking training, Mayo Clinic Proceedings — In 679 adults (mean age 65) who did 5 months of interval walking, peak aerobic capacity rose 14%; fast-walking time, not slow or total time, predicted the gains, which leveled off above about 50 minutes of fast walking a week.
- Patient.info (2025): What is the 6-6-6 walking challenge? — 6-6-6 is a 6-minute warm-up, a 60-minute brisk walk at 6 a.m. or 6 p.m., 6 days a week and a 6-minute cool-down; people with heart disease, diabetes, arthritis or COPD should check with a doctor first.
- Cleveland Clinic: The 12-3-30 workout — 12-3-30 means a 12% treadmill incline, 3 mph and 30 minutes; beginners can lower the incline, speed or time, and needing the handrails is a sign to lower the incline or speed.
- CDC: Measuring physical activity intensity — Moderate intensity means you can talk but not sing; at vigorous intensity you cannot say more than a few words without pausing for breath.
- CDC: Physical activity recommendations for adults — Adults need 150 minutes of moderate-intensity activity such as brisk walking each week, plus muscle strengthening on 2 days.