Displacement, compression, ring gap, bearings, and rotating assembly math for your short block build.
Calculators in this category
Engine Displacement Calculator — Bore × Stroke to Cubic Inches, CC & Liters — Free engine displacement calculator with 30+ engine specs table (SBC, LS, BBC, Ford, Mopar, Coyote, Cummins), 20 popular stroker combos with displacement gain, and overbore effect chart. Cubic inches ↔ liters ↔ cc conversions.
Compression Ratio Calculator — Static & Dynamic CR with Octane Chart — Free engine compression ratio calculator. Static + Dynamic (DCR) with three IVC methods, cranking pressure, and reverse-solve. Includes octane requirement chart, 22 popular engines with stock CR, head gasket thickness effect, and aluminum vs iron head adjustment.
Piston Ring Gap Calculator — Application-specific piston ring gap for NA, nitrous, turbo, supercharged, and diesel. Per-ring outputs with material warnings.
Piston Speed Calculator — Mean and peak piston speed in FPM with color-coded safety zones. Reference table of common engine redlines.
Quench & Deck Height Calculator — Piston-to-deck clearance, quench distance, and compression ratio in one tool. Gasket quick-picker updates everything live.
Connecting Rod Ratio Calculator — Calculate rod ratio with a visual gauge. Compare against common engines. Explains piston dwell and side loading.
Bearing Clearance Calculator — Main and rod bearing oil clearance from measurements or Plastigage. Per-bearing tables and oil viscosity recommendations.
Intake Manifold Milling Calculator — How much to mill the intake manifold after surfacing heads or decking the block. Tells you when correction is needed and how much.
Head Bolt & Main Bolt Spec Lookup — Look up head bolt and main bolt thread sizes, diameters, torque specs, and ARP upgrade part numbers for any engine platform.
CC to Cubic Inch Converter — Convert chamber volumes, piston dome/dish CCs, and displacement between cubic centimeters, cubic inches, liters, and fluid ounces.