All Tools

Free calculators and reference tools for A&P mechanics and students.

Calculations

Torque Extension Calculator

Calculate the correct torque wrench setting when using an extension. Uses TW = (T × L) / (L + E).

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Calculations

Bend Allowance Calculator

Calculate bend allowance, setback, and flat blank length for aircraft sheet metal work.

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Converters

Torque Unit Converter

Convert between in-lb, ft-lb, N·m, and kgf·cm. Includes AN bolt torque reference table.

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Converters

Decimal / Fraction Converter

Convert between fractional inches, decimal inches, and millimeters. Complete drill size chart.

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Hardware

AN Hardware Decoder

Decode AN and MS aircraft hardware part numbers. Supports bolts, nuts, washers, and cotter pins.

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Calculations

Rivet Size Calculator

Calculate recommended rivet diameter, edge distance, pitch, and grip length for aircraft sheet metal repairs.

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Calculations

Hydraulic Pressure / Force / Area Calculator

Calculate hydraulic pressure, force, or area using Pascal's Law. Essential for aircraft hydraulic system troubleshooting.

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Calculations

Aircraft Wire Gauge Calculator

Calculate minimum recommended AWG wire size for aircraft electrical circuits based on current, voltage, wire length, and voltage drop.

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Reference

Engine Compression Check Reference

Differential compression check interpretation guide for Continental and Lycoming aircraft engines.

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Calculations

Fuel Burn / Endurance / Range Calculator

Calculate aircraft endurance, range, or fuel required. Supports wind correction, unit toggle, and FAA reserve rules.

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Calculations

Ohm's Law / Circuit Calculator

Calculate voltage, current, resistance, or power for aircraft electrical circuits. Includes power wheel SVG and wire heating guidance.

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Hardware

MS Hardware Decoder

Decode MS (Military Standard) part numbers: solid rivets, self-locking nuts, cotter pins, machine screws, washers, and tinnerman nuts.

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Calculations

Weight & Balance Moment Calculator

Calculate weight, moment, and CG location for aircraft weight and balance calculations.

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