Compatibility calculator
Compare two birth dates by Sun sign and element. The match is a traditional sketch for curiosity, not advice about a real relationship.
How the label is picked
The Sun sign comes from the same astronomy engine as the other calculators on this site. Each sign sits in Fire, Earth, Air, or Water. Same element scores as a strong match. Fire with Air, and Earth with Water, score as a good match. Fire with Earth, and Air with Water, score as mixed. Fire with Water, and Earth with Air, score as challenging.
Nothing here is a forecast, and nothing is relationship advice. A challenging label does not say a pair should split. A strong label does not say they will. Read it the way the daily horoscopes are written: curiosity, not certainty. Dates stay in the browser.
Questions
How is the match label chosen?
Each Sun sign is Fire, Earth, Air, or Water. The same element is a strong match. Fire with Air, and Earth with Water, are a good match. Fire with Earth, and Air with Water, are mixed. Fire with Water, and Earth with Air, are challenging. This is a traditional sketch for curiosity, not advice about a real relationship.
What happens on a Sun sign changeover date?
Some calendar dates are the day the Sun changes sign, and the sign then depends on the year and the clock. This page asks the same engine used by the other calculators. If that engine flags a changeover, the result still needs one sign, so it uses noon UTC and names both signs. No birth time or city is collected.
Do the names change the match?
The name fields are optional. They change the headline on the page only. The copied line uses the two Sun signs, not the names, so it stays clear when you paste it. Blank names show as Person A and Person B. The match itself comes from the dates, and those dates are not sent to a server.
What does copy share line put on the clipboard?
The button copies one sentence: the two signs, the match label, and the page address calcjournal.com/compatibility-calculator. There is no login and no social network. If the browser blocks the clipboard, that same sentence remains on the page for you to copy by hand. A phone may ask permission first.
Does a challenging match mean a bad relationship?
No. Challenging only means the two elements are the pair this traditional sketch treats as opposites. People with those signs can get along well, and a strong match label does not guarantee anything. The result is for curiosity, in the same spirit as the horoscopes on this site. It is not a verdict.