Engine Displacement Calculator — CC, Liters & Cubic Inches
Calculate engine displacement using the formula: displacement = (π/4) × bore² × stroke × cylinders. Enter bore diameter (mm), stroke length (mm), and number of cylinders to get the total displacement in cubic centimeters (cc), liters (L), and cubic inches (cu in). For example: 86mm bore × 86mm stroke × 4 cylinders = 1998cc ≈ 2.0L.
Engine Displacement Calculator
Calculate engine displacement from bore, stroke, and number of cylinders. Results in cc, liters, and cubic inches.
Frequently Asked Questions
How do I calculate engine displacement?
Engine displacement = (π/4) × bore² × stroke × number of cylinders, where bore and stroke are in millimeters. The result is in cubic centimeters (cc). Divide by 1000 for liters, or multiply by 0.0610237 for cubic inches. Example: 86mm bore × 86mm stroke × 4 cylinders = 1998 cc ≈ 2.0L.
What is engine bore and stroke?
Bore is the diameter of the cylinder (in mm). Stroke is the distance the piston travels from top dead center (TDC) to bottom dead center (BDC). A larger bore allows a wider valve arrangement for better breathing; a longer stroke generates more torque at lower RPM.
What does 2.0L engine mean?
A 2.0L (2000cc) engine has a total cylinder displacement of 2 liters. For a typical inline-4 engine, this means each cylinder displaces approximately 500cc (2000 ÷ 4). Displacement is a key indicator of engine power potential, though modern turbocharged engines can produce more power from smaller displacements.
What is the difference between cc and liters?
CC (cubic centimeters) and liters (L) are both volume units. 1 liter = 1000 cc. Motorcycles and smaller engines are typically measured in cc (e.g., 600cc, 1000cc), while cars use liters (e.g., 1.5L, 2.0L, 5.7L). The conversion is simply: liters = cc ÷ 1000.
How many cc is a 5.7L V8?
A 5.7L V8 engine has 5700cc of displacement (5.7 × 1000 = 5700). The famous Chevrolet 350 small-block V8 with a 101.6mm bore and 88.4mm stroke in 8 cylinders calculates to approximately 5735cc ≈ 5.7L (350 cubic inches).
What is a square engine?
A square engine has equal bore and stroke dimensions. The famous Toyota 3S-GE engine (86mm × 86mm) is a classic example of a perfectly square engine at 2.0L displacement. Square engines balance peak power and torque characteristics.
Does more displacement mean more power?
Generally, larger displacement engines can produce more power because they draw in more air-fuel mixture per cycle. However, turbocharged or supercharged engines can produce significantly more power per liter than naturally aspirated engines. A turbocharged 2.0L can produce more power than a naturally aspirated 4.0L.
How is engine displacement related to taxes?
Many countries base vehicle taxes, road taxes, or import duties on engine displacement. Japan uses displacement tiers (under 660cc for kei cars, up to 3000cc categories). Some European countries tax by CO2 emissions which correlates with displacement. The UK used to tax by horsepower calculated from bore diameter.
About the Engine Displacement Calculator
About Engine Displacement
Engine displacement is the total volume swept by all pistons inside the cylinders of a reciprocating engine in a single movement from top dead center (TDC) to bottom dead center (BDC). It's one of the primary specifications of an engine and is closely related to power output, fuel consumption, and vehicle taxation in many countries.
Displacement is measured in cubic centimeters (cc), liters (L), or cubic inches (cu in) depending on the region and application.
Displacement Formula
Displacement = (π/4) × Bore² × Stroke × Cylinders
Where:
- Bore — Cylinder diameter (mm)
- Stroke — Piston travel distance from TDC to BDC (mm)
- Cylinders — Number of cylinders in the engine
- π/4 — Area of a circle (bore diameter to bore area conversion)
The formula calculates the volume of one cylinder (a circular cross-section swept through a stroke length) and multiplies by the number of cylinders.
Real Engine Examples
| Engine | Bore (mm) | Stroke (mm) | Cylinders | Displacement |
|---|---|---|---|---|
| Toyota 3S-GE (inline-4) | 86 | 86 | 4 | 1998 cc (2.0L) |
| Chevy 350 small-block V8 | 101.6 | 88.4 | 8 | 5735 cc (5.7L) |
| Honda CBR1000RR (inline-4) | 76 | 55.1 | 4 | 998 cc (1.0L) |
| Bugatti W16 | 86 | 86 | 16 | 7993 cc (8.0L) |
Unit Conversions
| From | To | Factor |
|---|---|---|
| cc (cm³) | Liters (L) | ÷ 1000 |
| cc (cm³) | Cubic inches (cu in) | × 0.0610237 |
| Liters (L) | cc (cm³) | × 1000 |
| Cubic inches | cc (cm³) | × 16.3871 |
Bore vs Stroke: Engine Character
The ratio of bore to stroke defines an engine's character:
- Over-square (bore > stroke) — High-revving, performance-oriented; typical in sports cars and motorcycles. Lower piston speeds allow higher RPM.
- Square (bore = stroke) — Balanced design; good combination of torque and power across RPM range.
- Under-square / long-stroke (stroke > bore) — Higher torque at lower RPM; typical in diesel engines and heavy-duty trucks.
Displacement and Power
While larger displacement generally means more power potential (more air/fuel mixture burned per cycle), modern turbocharged engines produce significantly more power per liter than naturally aspirated engines. A turbocharged 2.0L engine can produce as much power as a naturally aspirated 4.0L engine.
Specific power output (hp/L or kW/L) is a better measure of engineering sophistication than raw displacement. Formula 1 engines can produce over 300 hp/L from 1.6L turbocharged units.