HP to in-lb/sec Calculator
Convert horsepower to inch-pounds per second instantly.
This converter expresses horsepower in inch-pounds per second — a convenient unit for small motors, actuators, and precision mechanisms where inch-pounds are the natural torque unit.
HP to in-lb/sec Formula
How to Use This Calculator
- Enter horsepower.
- Read inch-pounds per second.
Worked Example
How This Unit Relates to Horsepower's Definition
Horsepower was defined as 550 foot-pounds of work per second (or 33,000 per minute). Multiply 550 by the 12 inches in a foot and you get 6,600 inch-pounds per second — the same power expressed in a finer unit. It's a work-rate unit, distinct from torque in inch-pounds: this describes energy delivered over time, not a static twisting force.
Practical Uses
Inch-pound-per-second figures appear in small-scale mechanical engineering, actuator and servo specifications, and physics work where inches are the working length unit. It lets you keep an entire calculation in inch-pound units rather than switching to feet or watts midway.
HP to in-lb/sec
| Horsepower | in-lb/sec | ft-lb/sec |
|---|---|---|
| 0.5 | 3,300 | 275 |
| 1 | 6,600 | 550 |
| 2 | 13,200 | 1,100 |
| 5 | 33,000 | 2,750 |
Frequently Asked Questions
One horsepower equals 6,600 inch-pounds per second, which is 550 foot-pounds per second multiplied by 12 inches per foot.
Multiply horsepower by 6,600.
It's useful for small motors, servos, and actuators where torque is naturally measured in inch-pounds rather than foot-pounds.
One foot-pound equals 12 inch-pounds, so 550 ft-lb/sec (1 HP) equals 6,600 in-lb/sec.
Divide inch-pounds per second by 6,600.