521 HP to kW
521 HP equals 388.51 kW.
Formula: HP × 0.7457 = kW
521 HP =
388.51kW
Metric HP (PS)
528.23 PS
Watts
388,509.7 W
521 HP is supercar territory — exotic sports cars and heavily tuned vehicles.
Computed to 3 decimal places using factor 0.7457. For engineering or safety-critical uses verify against a calibrated reference.
Reference table
HP to kW near 521
| horsepower (HP) | kilowatts (kW) | Metric HP (PS) | Watts |
|---|---|---|---|
| 491 HP | 366.14 kW | 497.81 PS | 366,138.7 W |
| 496 HP | 369.87 kW | 502.88 PS | 369,867.2 W |
| 501 HP | 373.6 kW | 507.95 PS | 373,595.7 W |
| 506 HP | 377.32 kW | 513.02 PS | 377,324.2 W |
| 511 HP | 381.05 kW | 518.09 PS | 381,052.7 W |
| 516 HP | 384.78 kW | 523.16 PS | 384,781.2 W |
| 521 HP | 388.51 kW | 528.23 PS | 388,509.7 W |
| 526 HP | 392.24 kW | 533.29 PS | 392,238.2 W |
| 531 HP | 395.97 kW | 538.36 PS | 395,966.7 W |
| 536 HP | 399.7 kW | 543.43 PS | 399,695.2 W |
| 541 HP | 403.42 kW | 548.5 PS | 403,423.7 W |
| 546 HP | 407.15 kW | 553.57 PS | 407,152.2 W |
| 551 HP | 410.88 kW | 558.64 PS | 410,880.7 W |
By use case
Popular HP values
Other HP values
Try any value
Interactive HP ↔ kW converter
Enter any value, get instant results across all units.
FAQ
Frequently asked
- How many kW is 521 HP?
- 521 mechanical horsepower = 388.51 kW. The exact factor is 1 HP = 0.7457 kW.
- What is 521 HP in PS (metric horsepower)?
- 521 HP = 528.23 PS. Metric HP (PS/CV) is slightly smaller than mechanical HP: 1 PS = 0.9863 HP.
- How do I convert 521 HP to kW without a calculator?
- Multiply HP by 0.746 for a close approximation: 521 × 0.746 = 388.67 kW. The exact answer is 388.51 kW.
- What kind of engine has 521 HP?
- 521 HP is high-performance / supercar territory — Porsche 911 Turbo, Chevrolet Corvette, BMW M5, or tuned builds.
More conversion tools