CPLGrid
Resources · Calculators

Free aviation calculators.

Practical flight-planning and DGCA exam-math tools built into CPLGrid. The calculations run locally in your browser; no account or data upload is required.
Wind & navigationAltitude & atmosphereFlight planningPilot math

The three most-used calculators are open below. Close any with the × button and use the dropdown to open the others.

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Wind Triangle — Heading & Groundspeed

Solve the wind triangle for wind correction angle, true heading, groundspeed and wind components.

Wind correction angle
5.2 °
True heading
95.2 °T
Groundspeed
126.9 kt
Crosswind component
10.0 kt

Wind from the right of course.

Tailwind component
17.3 kt

Crosswind & Headwind Component

Calculate the runway crosswind and headwind/tailwind component from wind direction and speed.

Crosswind
10.0 kt

From the right.

Headwind
17.3 kt

Time · Speed · Distance

Enter any two values and the third is calculated. Time is in minutes.

Distance
120.0 NM
Speed
110.0 kt
Time
65.5 min

1 h 05 min

Training and planning aid — not an operational authority

These tools are intended for education, DGCA exam preparation and rough planning. They use standard approximations where appropriate. For actual flight operations, always use current official weather, aircraft POH/AFM performance data, approved navigation equipment and your instructor or operator procedures.