Sailing-Calculator.png

Why the True Wind Sailing Calculator?

Sure, you can download an app and go electronic, but like all things on the water, they get lost, damaged and generally thrashed. When the going gets rough, the electronic gear becomes a potentially expensive liability.

The team at AGAIG Sailing are yachties, navigators, tacticians – and they want to win. We needed something to make the process of calculating true wind angles quickly and accurately. We did extensive research into a variety of products, yet we could not find something that we were happy with – something that was fit for purpose, light weight, did the job and went the distance.

We couldn’t find what we wanted, so we designed an made one ourselves. Taking time to refine the design, making prototypes and using them in competitive racing situations, we were finally able to produce the True Wind Sailing Calculator.

How do I use it?

Windward leeward – Set the inner circle wind direction marker “0” to the true wind direction on the outer ring.

Upwind: Your heading on the outer ring will align with your true wind angle on the inner ring and show the bearing you will be heading on the other tack from the corresponding inner ring angle.

Downwind: Check your heading from the outer ring to see your true wind angle on the inner ring and the corresponding angle will show the heading you will be on after gybing.

Fixed mark course – Set the inner circle wind direction marker “0” to the true wind direction on the outer ring.

Your course bearings of each leg can now be used on the outer ring to show you your true wind angle on the inner ring.


My boat doesn’t have a true wind instrument, how will this help me?

If you know your angle of sail, you can use it to calculate the true wind direction. Complete one tack or gybe and with the use of your compass, establish your true wind direction.

What makes the True Wind Sailing Calculator so good?

  • It’s light weight, waterproof, rust-proof, durable, made of flexible plastic and slips in your pocket easily.
  • Not just for the big boats either – they're great for dinghy sailors too. It can also be attached with a lanyard so you can’t lose it.
  • Keep a few in the navigation station.

True Wind Sailing Calculator - Individual

$22.95 AUD

Single calculator

True Wind Sailing Calculator - Individual

Add to Cart

True Wind Sailing Calculator - 10 pack

$180.00 AUD

A pack of ten sailing calculators

True Wind Sailing Calculator - 10 pack

Add 10 Pack to Cart