CockpitCalc is a free collection of aviation calculators designed for general aviation pilots — from student pilots on their first solo cross-country to instrument-rated pilots flying IFR in the system.
Pilots and students often struggle to find reliable, fast calculators for ground lessons and preflight planning. Many of the tools online are outdated, slow, or require creating an account just to use basic functionality. A physical E6B is essential for building foundational knowledge, but when you're in the FBO running through a weight and balance or checking density altitude before a flight, you need something fast and accurate on your phone.
The same calculations come up over and over — crosswind components, top of descent points, holding pattern entries, METAR decoding — so CockpitCalc puts them in one clean, free tool.
Every calculator on this site is built around the actual formulas and procedures from FAA publications, the AIM, and standard aviation textbooks. The holding pattern entry calculator uses the exact FAA sector criteria. The METAR decoder is built from the official NWS decode key. The density altitude formula is the standard ICAO calculation. Where a tool uses a rule of thumb instead of an exact formula — the 120 ft per °C density altitude correction, or the 400 ft per °C cloud base estimate — the page says so and explains its limits.
Eleven free aviation calculators covering the most common flight planning and in-cockpit calculations. The site is supported by unobtrusive ads and affiliate links — never between your inputs and your results. No paywalls. No account required to use any tool.
Student pilots — Use the weight and balance calculator before every solo flight. Practice METAR decoding before your written test. Run holding pattern entries until the sectors make sense. CockpitCalc covers the calculations that show up most on the private pilot knowledge test and oral exam.
Instrument students and rated pilots — The holding pattern entry calculator uses the exact FAA AIM sector criteria with support for both standard and non-standard turns. The METAR and TAF decoder handles the full NWS decode key including remarks, precipitation begin/end times, and change groups. Top of descent and descent gradient calculators for IFR arrivals.
CFIs and flight instructors — Use CockpitCalc as a teaching aid during ground lessons. Most calculators show the formula and intermediate values, not just the final answer — so you can walk students through the math. The density altitude and weight and balance tools are particularly useful for teaching hot and high performance degradation.
General aviation pilots — A fast, clean preflight planning resource. Save calculations to your account and access them from any device. No app to install, no subscription, no account required for basic use.
The formulas on CockpitCalc come from FAA and ICAO publications and standard aviation references. The weight and balance calculator uses standard moment arm calculations. Density altitude uses the ICAO standard atmosphere model. The holding pattern entry algorithm is taken directly from the FAA AIM. The METAR decoder is built from the official NWS METAR decode key.
That said — CockpitCalc is a reference and planning tool. Always verify critical calculations against your aircraft's official Pilot Operating Handbook (POH) and applicable FAA regulations. You are pilot in command, and the final responsibility for every flight decision rests with you.
Found a bug? Have a suggestion for a new calculator? Want to report an error in one of the formulas? We want to know.