Guides · 1.5 mile run on a treadmill
1.5 mile run treadmill speed: the setting for your test time, and the seconds it can hide
Your fitness test is six laps of a track in eight weeks, and you are training for it on a treadmill because the track is dark by the time your shift ends. You know the cut time and the speed that should match it, but not whether the belt really runs that speed.
For a 12:00 1.5 mile run on a treadmill, set 7.5 mph, an 8:00 mile. For other test times, press the first tenth at or above the exact speed. That matches your test only if the belt runs the speed shown, and on a 12:00 run a belt 2 percent slow costs about 15 seconds.
Treadmill speed for a 1.5 or 2 mile run, by test time
Find your test time and press the setting in the fourth column.
The setting for each test time
These are arithmetic on settings, not runs I measured. Each finish time holds only if the belt runs the speed shown.
| Test time | Pace per mile | Exact speed | Press | Finishes in |
|---|---|---|---|---|
| 1.5 mi in 10:00 | 6:40 | 9.00 mph | 9.0 | 10:00 |
| 1.5 mi in 11:00 | 7:20 | 8.18 mph | 8.2 | 10:59 |
| 1.5 mi in 12:00 | 8:00 | 7.50 mph | 7.5 | 12:00 |
| 1.5 mi in 13:00 | 8:40 | 6.92 mph | 7.0 | 12:51 |
| 1.5 mi in 14:00 | 9:20 | 6.43 mph | 6.5 | 13:51 |
| 1.5 mi in 15:00 | 10:00 | 6.00 mph | 6.0 | 15:00 |
| 2 mi in 14:00 | 7:00 | 8.57 mph | 8.6 | 13:57 |
| 2 mi in 16:00 | 8:00 | 7.50 mph | 7.5 | 16:00 |
| 2 mi in 18:00 | 9:00 | 6.67 mph | 6.7 | 17:55 |
| 2 mi in 20:00 | 10:00 | 6.00 mph | 6.0 | 20:00 |
The setting is the first tenth at or above the exact speed.
Settings step in tenths of a mile per hour, so most test times fall between two of them. Round up, not to the nearest tenth. For a 13:00, the nearest tenth is 6.9, and 6.9 finishes in 13:03, three seconds over.
The setting is an answer key nobody checked
The number you press is the speed you asked the belt for, and the display shows that request back to you. Nothing on the display tells you whether the belt underneath really turns at that speed, so 7.0 reads 7.0 either way.
Think of grading your practice tests with an answer key nobody checked. You can score full marks every week and still fail the real exam, because the real exam is graded against a key that is right. Your test is graded against a measured lap and a stopwatch, and the belt never had to agree with either one.
What a slightly slow belt does at the pass line
In a lab study of four treadmills, one of them heavily worn, with people walking and running on them, average belt speed ranged from about 98 to 103 percent of the speed that was set. Now take the 13:00 row. On paper, 7.0 finishes in 12:51, nine seconds under your cut. If the belt runs 2 percent slow, every run you did at 7.0 was really a 13:07 effort. Your nine second cushion was gone, and you were seven seconds over. You would find that out on the track, on the one day the time counts.
On a 1.5 mile test, each 1 percent the belt runs slow is worth about 6 to 9 seconds, and slower test times lose more. The 1.5 mile rows carry a cushion of zero to nine seconds, so a setting that finishes just under your cut is the one to doubt.
A fast belt works the other way. On a belt 3 percent fast, those runs at 7.0 were a 12:29 effort, so you are fitter than your log says. On test day that costs you nothing but an easier target than you thought. At a pass line a slow belt is the error that costs you, and the display cannot tell you which way your belt leans.
Grade the answer key before the eight weeks start
A watch on your wrist cannot grade the belt for you. Indoors it takes pace from the motion of your wrist, so it never sees what the belt is doing.
Before the block starts, find out what your belt does at the setting you plan to live on. Treadwell measures the belt's real speed with an iPhone Pro's camera and LiDAR sensor while the belt runs at that setting with nobody on it. That tells you whether the belt itself runs the speed you pressed. The reading is the belt's speed with nobody on it, not your finish time to the second. If it comes back slow, press a tenth or two higher until the belt itself runs your cut speed, and train there. A belt that is far off is one for the owner's manual or a service visit.
Check your cut setting before you train on it
Six laps on test day will grade the setting you chose. Grade it yourself first, with an iPhone Pro, since the reading uses its LiDAR sensor.
Scan with your iPhone Pro to get the appTested: in our tachometer tests the app read within about 2 percent of true belt speed.
Quick answers
What treadmill speed is a 1.5 mile run in 12 minutes? For a 12:00 1.5 mile run on a treadmill, set 7.5 mph, an 8:00 mile. For other test times, press the first tenth at or above the exact speed. That matches your test only if the belt runs the speed shown, and on a 12:00 run a belt 2 percent slow costs about 15 seconds.
Can you take a 1.5 mile test on a treadmill? Most tests, including police academy 1.5 mile runs, are run on a track or a measured course. The Navy's physical readiness guide lets a commanding officer allow a treadmill option instead. It is run at 1 percent incline on a treadmill whose odometer accurately measures distance in miles. The belt starts on the command to start, and the stopwatch starts at the same moment. That rule asks for an accurate odometer, and nothing on the machine shows you whether yours is one.
What is a 2 mile run time on a treadmill? Use the 2 mile rows in the table on this page. A steady 7.5 mph is a 16:00 two miles and 6.0 is a 20:00, provided the belt really turns at that setting. The Army's two mile event is run on a track or a paved surface, not a treadmill, so your treadmill time is a training number that rests on the belt.
Sources.
- Willwacher S, et al., Scientific Reports 11:2244 (2021): across four lab treadmills, one of them heavily worn, average belt speed during walking and running stayed between about 98 and 103 percent of the set speed.
- Navy treadmill option: US Navy Physical Readiness Program, Physical Readiness Test guide (Guide-5A, DEC 2025), alternate cardio section. The option is at the commanding officer's discretion. The treadmill needs an odometer that accurately measures distance traveled in miles and runs at 1.0 percent incline, and the official time is a stopwatch started on the command "Start".
- Army two mile run: Army Fitness Test, army.mil/aft. Run on a measured, generally flat course, on an indoor or outdoor track or an improved surface such as a road or sidewalk.
- Police 1.5 mile runs on a track: Pennsylvania Municipal Police Officers' Education and Training Commission, physical fitness standards (recommends a 440 yard oval track, timed to the nearest second); Indiana Law Enforcement Academy, 1.5 mile run protocol (a track or flat area measured to 1.5 miles).
- Apple Support article 105002: on an indoor run an Apple Watch takes its pace from its accelerometer, not from the belt.
- The table and the two belt-error examples are worked arithmetic, not logged runs: speed is distance over time, the setting rounds up to the first 0.1 mph at or above the exact speed, and a belt 2 percent slow or 3 percent fast stretches or shrinks the finish time by that share.