Diesel Toolkit
Diesel shop math in one place.
Fast, practical calculators for diesel technicians, students, and heavy-duty shops.
Popular Tools
6 tools
Unit Conversion Calculator
Convert common diesel shop units quickly across imperial and metric.
Torque Conversion Calculator
Convert torque values between lb-ft, lb-in, and Newton-meters.
Pressure Conversion Calculator
Convert pressure between psi, bar, kPa, and MPa.
Compression Ratio Calculator
Estimate static compression ratio from chamber and deck geometry values.
RPM Calculator
Estimate engine RPM from speed and gearing, or reverse-calculate speed from RPM.
Fuel Cost Calculator
Estimate fuel used, total fuel cost, and cost per mile for a trip.
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Calculator Categories
Fluid and Volume
Volume, flow, and capacity checks for fuel and fluid systems.
Pressure and Air Systems
Pressure conversions and air system math tools.
Torque and Fastener
Torque conversions and thread/tap reference helpers.
Electrical
Volts, amps, watts, and resistance calculators.
Fuel System
Fuel usage, injector balance, return-rate, rail pressure, and leak-down checks.
Engine Math
Displacement and compression ratio estimates.
Drivetrain and Gearing
RPM and road speed estimators for gearing analysis.
Unit Conversions
Quick imperial and metric conversion tools for shop use.
Shop Math
General percentage and comparison math for diagnostics.
Quick Access
Built for the Shop
Transparent Math
Why Diesel Toolkit Exists
Diesel techs need fast calculations daily, but tools are usually spread across manuals, random sites, and phone notes. This app centralizes practical, high-frequency shop math into one clean workflow.