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Formula For Cubic Inches From Number Of Cylinders, Bore Size, And Stroke Length
When determining the size of an engine, you need to know the number of cylinders, the bore, and the stroke.
The formula for finding the size is
D = (π/4)B²SN.
D = displacement (CID), π (pie) = 3.14159, B=bore, S=stroke, and N=number of cylinders.
For example, with a bore of 4.00, a stroke of 3.48, and 8 cylinders, begin substituting the letters for the numbers in the formula:
(3.14159/4) x (4 squared or 4x4) x 3.48 x 8
Then refine further: (0.786) x (16) x 3.48 x 8 = 349.84, or 350 cubic inches when rounded up.
Engine Size Calculator
(leave the field blank for the dimension you want to find)
Bore Diameter (in inches):
Crankshaft Stroke (in inches):
Number of Cylinders:
CID:
Calculate:
Converting CID to Liters and Liters to CID
To convert cubic inches to liters, divide the cubic inches by 61. While, "61.0237441" is the exact number to divide by but in most cases it will not affect the conversion enough to change the rounded size.
For example, a 350 cubic inch engine to liters is 350/61 = 5.737, rounded down to 5.7 liters.
To convert liters to CID, multiply the liters by 61 (or 61.0237441). For example 5.7 x 61 = 347.7 (technically 348 CID, but rounded up to 350 CID by the manufacturer.)
Engine CID/Liter Conversion Calculator
(leave the field blank for the dimension you want to find)
CID:
Liters:
Calculate:
Engine Cubic Inch Chart For Bore And Stroke Of GM, Ford, And Mopar Engines
| Manufacturer | CID | Liters | # of Cylinders | Bore (inch) | Stroke(inch) | |
| AMC | 304 | 5.0 | 8 | 3.750 | 3.438 | |
| AMC | 360 | 5.9 | 8 | 4.080 | 3.438 | |
| AMC | 390 | 6.4 | 8 | 4.166 | 3.570 | |
| AMC | 401 | 6.6 | 8 | 4.165 | 3.680 | |
| Buick | 215 | 3.5 | 8 | 3.500 | 2.800 | |
| Buick | 231 | 3.8 | 6 | 3.800 | 3.400 | |
| Buick | 252 | 4.1 | 6 | 3.965 | 3.400 | |
| Buick | 350 | 5.7 | 8 | 3.800 | 3.850 | |
| Buick | 455 | 7.5 | 8 | 4.312 | 3.900 | |
| Chevy | 173 | 2.8 | 6 | 3.504 | 2.992 | |
| Chevy | 200 | 3.3 | 6 | 3.500 | 3.480 | |
| Chevy | 229 | 3.8 | 6 | 3.736 | 3.480 | |
| Chevy | 230 | 3.8 | 6 | 3.875 | 3.250 | |
| Chevy | 250 | 4.1 | 6 | 3.875 | 3.531 | |
| Chevy | 262 | 4.3 | 6 | 4.000 | 3.480 | |
| Chevy | 283 | 4.6 | 8 | 3.875 | 3.000 | |
| Chevy | 302 | 4.9 | 8 | 4.000 | 3.000 | |
| Chevy | 305 | 5.0 | 8 | 3.736 | 3.480 | |
| Chevy | 307 | 5.0 | 8 | 3.875 | 3.250 | |
| Chevy | 327 | 5.3 | 8 | 4.000 | 3.250 | |
| Chevy | 345 | 5.6 | 8 | 3.897 | 3.620 | |
| Chevy | 350 | 5.7 | 8 | 4.000 | 3.480 | |
| Chevy | 355 | 5.8 | 8 | 4.030 | 3.480 | |
| Chevy | 360 | 5.9 | 8 | 4.060 | 3.480 | |
| Chevy | 366 | 6.0 | 8 | 3.935 | 3.750 | |
| Chevy | 377 | 6.2 | 8 | 4.155 | 3.480 | |
| Chevy | 383 | 6.3 | 8 | 4.030 | 3.750 | |
| Chevy | 383 | 6.3 | 8 | 4.185 | 3.480 | |
| Chevy | 388 | 6.3 | 8 | 4.060 | 3.750 | |
| Chevy | 396 | 6.5 | 8 | 4.094 | 3.766 | |
| Chevy | 400 | 6.6 | 8 | 4.125 | 3.750 | |
| Chevy | 402 | 6.6 | 8 | 4.125 | 3.766 | |
| Chevy | 406 | 6.6 | 8 | 4.155 | 3.750 | |
| Chevy | 409 | 6.7 | 8 | 4.312 | 3.500 | |
| Chevy | 427 | 7.0 | 8 | 4.250 | 3.766 | |
| Chevy | 434 | 7.1 | 8 | 4.155 | 4.000 | |
| Chevy | 454 | 7.4 | 8 | 4.250 | 4.000 | |
| Chevy | 461 | 7.5 | 8 | 4.155 | 4.250 | |
| Chevy | 502 | 8.2 | 8 | 4.466 | 4.000 | |
| Chevy | 580 | 9.5 | 8 | 4.526 | 4.500 | |
| Chevy | 580 | 9.5 | 8 | 4.466 | 4.625 | |
| Chevy | 588 | 9.6 | 8 | 4.500 | 4.625 | |
| Chevy | 589 | 9.7 | 8 | 4.566 | 4.500 | |
| Chevy | 627 | 10.3 | 8 | 4.466 | 5.000 | |
| Chevy | 636 | 10.4 | 8 | 4.500 | 5.000 | |
| Chrysler | 170 | 2.8 | 6 | 3.400 | 3.125 | |
| Chrysler | 181 | 3.0 | 6 | 3.587 | 2.992 | |
| Chrysler | 198 | 3.2 | 6 | 3.400 | 3.640 | |
| Chrysler | 201 | 3.3 | 6 | 3.661 | 3.188 | |
| Chrysler | 225 | 3.7 | 6 | 3.400 | 4.120 | |
| Chrysler | 238 | 3.9 | 6 | 3.910 | 3.310 | |
| Chrysler | 273 | 4.5 | 8 | 3.630 | 3.310 | |
| Chrysler | 318 | 5.2 | 8 | 3.910 | 3.313 | |
| Chrysler | 340 | 5.6 | 8 | 4.040 | 3.313 | |
| Chrysler | 360 | 5.9 | 8 | 4.000 | 3.578 | |
| Chrysler | 383 | 6.3 | 8 | 4.100 | 3.650 | |
| Chrysler | 383 | 6.3 | 8 | 4.250 | 3.375 | |
| Chrysler | 392 | 6.4 | 8 | 4.000 | 3.900 | |
| Chrysler | 400 | 6.6 | 8 | 4.342 | 3.375 | |
| Chrysler | 400 | 6.6 | 8 | 4.040 | 3.900 | |
| Chrysler | 409 | 6.7 | 8 | 4.250 | 3.600 | |
| Chrysler | 409 | 6.7 | 8 | 4.040 | 4.000 | |
| Chrysler | 413 | 6.7 | 8 | 4.180 | 3.750 | |
| Chrysler | 420 | 6.9 | 8 | 4.100 | 4.000 | |
| Chrysler | 426 | 7.0 | 8 | 4.250 | 3.750 | |
| Chrysler | 440 | 7.2 | 8 | 4.320 | 3.750 | |
| Chrysler | 444 | 7.3 | 8 | 4.342 | 3.750 | |
| Chrysler | 488 | 8.0 | 10 | 4.000 | 3.578 | |
| Chrysler | 511 | 8.4 | 8 | 4.250 | 4.500 | |
| Chrysler | 528 | 8.6 | 8 | 4.320 | 4.500 | |
| Chrysler | 539 | 8.8 | 8 | 4.250 | 4.750 | |
| Chrysler | 542 | 8.9 | 8 | 4.380 | 4.500 | |
| Chrysler | 560 | 8.2 | 8 | 4.445 | 4.500 | |
| Chrysler | 563 | 9.2 | 8 | 4.342 | 4.375 | |
| Ford | 122 | 2.0 | 4 | 3.575 | 3.029 | |
| Ford | 140 | 2.3 | 4 | 3.780 | 3.130 | |
| Ford | 232 | 3.8 | 6 | 96.8mm | 86mm | |
| Ford | 281 | 4.6 | 8 | 3.550 | 3.542 | |
| Ford | 289 | 4.7 | 8 | 4.000 | 2.870 | |
| Ford | 300 | 4.9 | 6 | 4.000 | 3.980 | |
| Ford | 302 | 5.0 | 8 | 4.000 | 3.000 | |
| Ford | 306 | 5.0 | 8 | 4.030 | 3.000 | |
| Ford | 347 | 5.7 | 8 | 4.030 | 3.400 | |
| Ford | 347 | 5.69 | 8 | 4.030 | 3.400 | |
| Ford | 351 | 5.8 | 8 | 4.000 | 3.500 | |
| Ford | 354 | 5.8 | 8 | 4.030 | 3.400 | |
| Ford | 360 | 5.9 | 8 | 4.050 | 3.500 | |
| Ford | 390 | 6.4 | 8 | 4.050 | 3.781 | |
| Ford | 400 | 6.6 | 8 | 4.000 | 4.000 | |
| Ford | 408 | 6.7 | 8 | 4.030 | 4.000 | |
| Ford | 418 | 6.8 | 8 | 4.030 | 4.100 | |
| Ford | 418 | 6.9 | 8 | 4.030 | 4.100 | |
| Ford | 421 | 6.9 | 8 | 4.030 | 4.125 | |
| Ford | 427 | 7.0 | 8 | 4.234 | 3.781 | |
| Ford | 428 | 7.0 | 8 | 4.130 | 3.980 | |
| Ford | 429 | 7.0 | 8 | 4.360 | 3.590 | |
| Ford | 454 | 7.4 | 8 | 4.125 | 4.250 | |
| Ford | 460 | 7.5 | 8 | 4.360 | 3.850 | |
| Ford | 514 | 8.4 | 8 | 4.390 | 4.250 | |
| Oldsmobile | 307 | 5.0 | 8 | 3.800 | 3.385 | |
| Oldsmobile | 330 | 5.4 | 8 | 3.938 | 3.385 | |
| Oldsmobile | 350 | 5.7 | 8 | 4.057 | 3.385 | |
| Oldsmobile | 403 | 6.6 | 8 | 4.351 | 3.385 | |
| Oldsmobile | 425 | 7.0 | 8 | 4.125 | 3.98 | |
| Oldsmobile | 455 | 7.5 | 8 | 4.125 | 4.25 | |
| Pontiac | 151 | 2.5 | 4 | 4.000 | 3.000 | |
| Pontiac | 301 | 4.9 | 8 | 4.000 | 3.000 | |
| Pontiac | 326 | 5.3 | 8 | 3.719 | 3.750 | |
| Pontiac | 350 | 5.7 | 8 | 3.875 | 3.750 | |
| Pontiac | 389 | 6.4 | 8 | 4.062 | 3.750 | |
| Pontiac | 400 | 6.6 | 8 | 4.120 | 3.750 | |
| Pontiac | 428 | 7.0 | 8 | 4.120 | 4.000 | |
| Pontiac | 455 | 7.5 | 8 | 4.151 | 4.210 |
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