Your chart looks different on another site
Five reasons two calculators disagree, in the order they are usually the cause.
On this page
If another Human Design calculator gives you a different chart, one of these is nearly always why. They are listed in the order we actually find them.
1. The time zone was applied differently
By a distance the most common cause. Some calculators ask you to enter UTC, some ask for local time, and some ask for local time but apply today's time-zone rules rather than the ones in force on your birth date. An hour of difference moves the Moon about half a gate and can change every line in the chart.
Our form takes local clock time and applies the historical rules for the city you picked. If the other site asked you to enter an offset by hand, check what you entered.
2. One of you is sidereal
The two zodiacs sit about twenty-four degrees apart, which is roughly four gates, so the charts will look wholly different rather than slightly off. Our app is tropical only — see tropical and sidereal.
If the difference is large and systematic, this is why.
3. The birth time is unknown on one of them
A noon chart and a real-time chart will agree on the slow planets and disagree on the Moon, the lines and often the profile. Check whether the other chart was cast with a time at all. See unknown birth time.
4. Different design-time conventions
The design side is the moment the Sun was 88 degrees of arc before birth. Some implementations approximate this as 88 days. Because the Sun moves faster in January than in July, the approximation can be several hours out — enough to move a fast-moving design planet across a line boundary, occasionally across a gate.
We solve for the exact 88-degree instant.
5. Rounding at a boundary
If an activation sits within a fraction of a degree of a gate or line boundary, two ephemerides with slightly different precision can land either side of it. This is rare, and it produces a one-line difference rather than a different chart.
What to do
Compare the Sun gate and line first. If those match, the birth moment agrees between the two systems and the differences are downstream. If they do not, the disagreement is in step 1 or step 2 above.
If you have worked through all five and still think our chart is wrong, write to us with your birth date, time, place, and what the other calculator produced. We will check it by hand.