All Tools
Free calculators and reference tools for A&P mechanics and students.
Torque Extension Calculator
Calculate the correct torque wrench setting when using an extension. Uses TW = (T × L) / (L + E).
Open ToolBend Allowance Calculator
Calculate bend allowance, setback, and flat blank length for aircraft sheet metal work.
Open ToolTorque Unit Converter
Convert between in-lb, ft-lb, N·m, and kgf·cm. Includes AN bolt torque reference table.
Open ToolDecimal / Fraction Converter
Convert between fractional inches, decimal inches, and millimeters. Complete drill size chart.
Open ToolAN Hardware Decoder
Decode AN and MS aircraft hardware part numbers. Supports bolts, nuts, washers, and cotter pins.
Open ToolRivet Size Calculator
Calculate recommended rivet diameter, edge distance, pitch, and grip length for aircraft sheet metal repairs.
Open ToolHydraulic Pressure / Force / Area Calculator
Calculate hydraulic pressure, force, or area using Pascal's Law. Essential for aircraft hydraulic system troubleshooting.
Open ToolAircraft Wire Gauge Calculator
Calculate minimum recommended AWG wire size for aircraft electrical circuits based on current, voltage, wire length, and voltage drop.
Open ToolEngine Compression Check Reference
Differential compression check interpretation guide for Continental and Lycoming aircraft engines.
Open ToolWeight & Balance Moment Calculator
Calculate weight, moment, and CG location for aircraft weight and balance calculations.
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