For Flight Schools & CFIs

All of them. Every calculator and converter on the site is free to use and free to share with your students — in the classroom, in briefings, or in assignments. You do not need our permission to reference or assign any tool. Browse the full list on the Calculators and Converters pages, or share our printable Pilot Calculator Checklist as a ready-made planning assignment.

The calculators require no login, no email address, no download, and no payment. Students can open any tool and use it immediately. Calculations run entirely in the browser, so there is no account to manage and nothing tracked to a student profile.

Every calculator is built from an identified authoritative source, validated against known-correct examples, and documented with its assumptions and limitations. Our Calculation Methodology page includes a per-calculator table of primary sources, formula types, and key assumptions, and the Sources & References page is a full bibliography with editions and effective dates. Students can learn to check any result on the How to Verify Our Calculations page.

If you or a student find a result that looks wrong, please tell us. Our Corrections Policy explains how to report an issue, how we triage it, and how corrections are logged publicly. Instructor-reported issues are especially valuable and are prioritized.

We publish ready-to-print, blank planning worksheets — a weight & balance loading sheet, a cross-country navigation log, and a takeoff/landing performance sheet — on the Printable Worksheets page. Need something more specific to a lesson? Reach out through our Contact page and describe what you are teaching. We are happy to point you to the right tool or, where it makes sense, add a printable worksheet that others can use too.

Every tool has a clean, permanent URL you can share or embed in a syllabus:

• Calculators: https://flightcalculators.com/calculators/<tool>
• Converters: https://flightcalculators.com/converters/<tool>

For example, the density altitude calculator is at /calculators/density-altitude. Suggested link text is simply the tool name, e.g. “Density Altitude Calculator (FlightCalculators.com)”. For full URL conventions, suggested link text, and attribution guidance, see our Link to Us page.

You are welcome to link to us, but you are under no obligation to. We do not require a reciprocal link, an attribution banner, or any exchange. Link only if it genuinely helps your students. We do not participate in link-exchange schemes.

• Have students calculate the density altitude for your home airport on a hot day, then compare the result with the E6B and discuss the effect on takeoff distance.
• Assign a three-leg cross-country: students compute heading, groundspeed, and fuel with reserves for each leg, then verify totals on a manual E6B.
• Run a weight-and-balance scenario at forward and aft CG limits and discuss handling and performance implications.
• Decode a live METAR, determine the flight category, and estimate the cloud base — then debrief the go/no-go decision.

For a full mapping of tools to ACS knowledge areas with ready-to-use exercises, see the CFI Classroom Resources page. For fully worked, multi-calculator scenarios you can walk through with students, see our Worked Examples.