Compare two speeds

Both speeds use miles per hour. Belt range: 1–25 mph; target range: 1–30 mph. Sliders move by 0.1 mph; type more precise values above. These control ranges do not establish model accuracy.

Modeled incline

Illustrative example: 12 → 15 mph.

11.2%

Percent grade, not degrees.

Belt speed
12 mph
Target flat speed
15 mph

This is the existing model’s comparison, not a verified prediction of individual effort equivalence.

Read the model

Grade (%) = (15 − 12) ÷ (0.228887 × exp(0.013333 × 12)). Calculated grade: 11.169012% (8 significant digits).

The main grade rounds to one decimal place. Positive grades below 0.05% are labeled explicitly. A 10% grade means 10 units of rise per 100 horizontal units; it is not a 10-degree angle.

The two coefficients are an existing proprietary fit, not a published formula. This comparison does not model the runner’s physiology, fatigue, weather or treadmill calibration, and is not an official training or qualification standard.

Use the treadmill’s actual specifications for available speeds and grades. The 15% cue is a reminder to check the machine, not a universal equipment limit or a personal training recommendation.