Free grand trine calculator

Do you have a grand trine? And how rare is yours, really?

About 39 in 100 charts have a grand trine somewhere, so finding one is the easy part. What's worth knowing is how tight yours is. Enter your birth details and we'll measure it.

This is just one shape. Your whole chart shows you your birth chart drawn out, your Sun, Moon and rising sign, and the one shape in your chart that is most worth a closer look.

See your whole chart

Also in your chart

Here is the same check for the other shapes. You can open any of them to see yours in detail.

If you'd like a reading, the options are at the bottom of this page.

Would you like to look closer?

A reading is created from the whole of your chart, not just one shape. Your birth details are already here, so the form below takes you straight to a secure payment page.

It arrives in a private learning portal, with a chat function you can ask about it. If you are not sure what a reading looks like, you are welcome to read three chapters from a real one, which is my own.

Your reading · ~~usually £90~~ £60 special offer An in-depth reading of every part of your chart and how they work together, chapter by chapter, with diagrams drawn from your chart. It includes the areas of your life, such as home, work, money and partnership. The full unlock · £180 Your reading tells you what your chart holds, and this takes you into it. It is your reading, the areas of your life included, with what's live for you now added. The planets have kept moving since you were born, and as each one passes over a place in your chart, that part of you tends to come to the front for a while. This looks at the next six months and shows which parts of your chart are being reached, how closely, and when. As each date arrives, you can check it against your own life. It comes with a practice companion: guided practices drawn from your own reading. If you have already paid for a reading, what you paid is taken off the £180. This one is made to order, so there's nothing to pay now and I'll reply by email.

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Send the birth details above with my request, to be stored securely and used only to prepare it.

You'll be taken to a secure Stripe page to pay £60 by card. Your reading is delivered within 7 days of my starting it, and you can cancel for a full refund within 14 days of paying, until I start. The terms cover cancelling and refunds.

If you'd like to ask me something first, you're welcome to get in touch.

What is a grand trine?

Three points in a chart each sit a trine (120°) from the other two, making an equilateral triangle across the wheel. The three usually fall in signs of the same element, fire, earth, air or water, which is why a grand trine is often named after its element.

Three parts of you sit at easy angles to one another and pass things between themselves without effort. Astrologers call this a grand trine. It's fairly common, and it describes a talent more often than a fortune.

What the three share tends to come so naturally that you may barely count it as a skill. That's the catch. A gift that costs nothing is easy to leave undeveloped, and the parts of life that take effort tend to get all the attention. The ease is also closed: it runs well on its own but doesn't always reach the rest of you. It usually grows when you choose to put it to work on something that matters to you, rather than leaving it idling.

How common is a grand trine?

It's often described as rare, but at the orbs usually allowed it isn't. Here's how often it turns up, measured across 100,000 random birth charts from 1930 to 2025:

Grand trine	Charts with one
Any grand trine, at the orbs usually allowed	39 in 100
Every side within 2°	7 in 100
Every side within 1°	2 in 100
Every side within half a degree	about 1 in 190

We count the planets, the Moon's nodes, Chiron, the Part of Fortune, the Vertex and the angles. The tighter the sides, the less common it gets, which is what the figure in your result measures.

Questions

Is a grand trine rare?

Not at the usual orbs. Measured across 100,000 random charts, about 39 in 100 have a grand trine somewhere. A tight one is another matter, though, because about 1 in 190 has one with every side within half a degree. That's why this calculator measures yours instead of just finding it.

Is a grand trine lucky?

It describes ease, which isn't the same thing. What the three points share tends to come so naturally that it's easy to leave undeveloped. It usually shows its worth when it's put to work on something that takes effort.

What does "1 in X charts have one this strong" mean?

We scored a million random charts the same way as yours and counted how many have a grand trine at least as tight, and the figure is that share. Below about 1 in 20 we use a word instead of a number, because a figure that small doesn't tell you much.

What if I don't know my birth time?

The calculator still works, but a grand trine that involves your Moon or your rising sign can't be placed, because both move too far in a day. If that's possible for your chart, it tells you it can't be sure, rather than saying no.