HP to CC Conversion Calculator
Convert between horsepower (HP) and cubic centimeters (CC) for small engines, motorcycles, cars, and more. Understand engine size and power relationships.
Conversion Result
Engine Classification
Engine Type Details
Common Engine CC to HP Reference
| Engine Type | CC | HP (Approx) | Ratio (CC/HP) |
|---|---|---|---|
| Lawn Mower (Push) | 140 | 4.5 | 31.1 |
| Lawn Mower (Self-Propelled) | 190 | 6.0 | 31.7 |
| Snow Blower (Single-Stage) | 200 | 6.5 | 30.8 |
| Snow Blower (Two-Stage) | 350 | 10.0 | 35.0 |
| Chainsaw (Small) | 35 | 1.5 | 23.3 |
| Chainsaw (Medium) | 50 | 3.0 | 16.7 |
| Chainsaw (Large) | 70 | 5.0 | 14.0 |
| Motorcycle (125cc) | 125 | 13.0 | 9.6 |
| Motorcycle (250cc) | 250 | 25.0 | 10.0 |
| Motorcycle (500cc) | 500 | 45.0 | 11.1 |
| Motorcycle (750cc) | 750 | 75.0 | 10.0 |
| Motorcycle (1000cc) | 1,000 | 100.0 | 10.0 |
Conversion Formula
CC to HP: HP = CC ÷ Ratio
HP to CC: CC = HP × Ratio
Typical Ratios (CC per HP):
- Small Engines: 22-30 CC/HP (lawn mowers, generators)
- Motorcycles: 10-15 CC/HP (modern designs)
- Automotive: 12-18 CC/HP (cars)
- Marine: 15-20 CC/HP (outboard motors)
Frequently Asked Questions
How do you convert CC to HP?
The general formula is: HP = CC ÷ Ratio where the ratio varies by engine type. For example, a 250cc motorcycle with a 12:1 ratio would have approximately 20.8 HP (250 ÷ 12 = 20.8).
How many CC is 1 HP?
The number of CC per HP varies by engine type. Typically:
- Small engines: 22-30 CC per HP
- Motorcycles: 10-15 CC per HP
- Cars: 12-18 CC per HP
- High-performance: 8-12 CC per HP
How many HP is 250cc?
A 250cc engine typically produces about 15-30 HP depending on the type:
- Small engine (lawn mower): ~8-12 HP
- Motorcycle (standard): ~20-25 HP
- Motorcycle (sport): ~25-30 HP
How many HP is 1000cc?
A 1000cc engine typically produces about 70-150 HP:
- Car engine: ~70-90 HP (economy)
- Motorcycle: ~100-120 HP (standard)
- Sport motorcycle: ~150-200 HP
Why does CC to HP ratio vary?
The ratio varies because HP depends on many factors beyond engine size:
- Engine design (4-stroke vs 2-stroke)
- Compression ratio
- Fuel injection vs carburetor
- Turbocharging or supercharging
- Valve timing and design
What is the CC to HP ratio for small engines?
Small engines (lawn mowers, generators, snow blowers) typically have a ratio of 22-30 CC per HP. For example, a 140cc lawn mower engine produces about 4.5-5 HP (140 ÷ 28 ≈ 5).
How many CC is a 5.5 HP engine?
A 5.5 HP engine is typically around 140-160cc. For small engines with a 25:1 ratio: 5.5 × 25 = 137.5 CC (approximately 140-150cc).
Is higher CC always more powerful?
Generally, larger CC engines produce more power, but it's not always proportional. A well-designed 500cc engine can produce more HP than a poorly designed 1000cc engine. Technology and efficiency matter greatly.
Can I increase HP without increasing CC?
Yes! You can increase HP through:
- Better air intake and exhaust
- Increased compression ratio
- Performance tuning (ECU remapping)
- Turbocharging or supercharging
- Improved fuel delivery