If you are searching for a synastry chart you can trust, start here. This free synastry chart calculator turns two birth profiles into a clear, printable-style result: a dual wheel, a full matrix of planetary aspects, and—when you add a city—relocated overlays that show how each of you lands in the other’s wheel at that location. A synastry chart is not a single compatibility score; it maps chemistry, friction, timing, and emotional tone through real aspects. Our output lists major contacts with standard orbs so the tightest dialogues surface first. Whether you call it a synastry chart or a two-chart comparison, the goal is the same: see how two natal charts speak to each other.
Synastry overlays two natal charts so you can read relationship dynamics through aspects and—when you add location—house overlays. Unlike a composite chart, synastry keeps both people visible: your planets aspect your partner’s planets directly. It names Venus–Mars attraction, Sun–Moon emotional fit, Mercury patterns, Saturn durability—without reducing a bond to one label. Workflow: generate your synastry chart, scan aspects, optionally test a shared city for relocated angles, then open Astrocartography maps if you need geography.
A quick horoscope match can be fun, but a synastry chart goes deeper. Real planetary positions—not only Sun signs—describe chemistry and conflict. Relationship astrology is multidimensional: the Moon speaks to needs, Venus to affection, Mars to pacing, Saturn to durability, Mercury to how you talk t...
This synastry chart calculator is built for readability: a biwheel view plus a sortable list of major aspects between ten classical points for both people. You will see conjunctions, oppositions, squares, trines, and sextiles within standard orbs—what most readers check first in any synastry reading...
Aspects in a synastry chart do not change when you travel, but angles and houses do—so we offer an optional shared city for relocated overlays. That adds whole-sign context for one place. For geography alone, open a full map per person; for relationship structure, stay with the synastry chart first.
A synastry chart describes tendencies, not fate. The healthiest reading pairs astrology with communication: name the aspect, discuss the need behind it, and choose behaviors that fit your values. Avoid turning any synastry chart into a verdict—use it as language for empathy and timing. If birth time...
This synastry chart calculator is for couples, friends, and curious readers who want a synastry chart they can explore without friction: fast inputs, transparent outputs, and a path from chart to maps when location matters.
Follow four steps to generate a synastry chart, then deepen the reading with overlays and maps.
Add dates, optional times (defaults to 12:00 local), birth places, and timezones. Accurate data sharpens the synastry chart—especially for the Moon and angles.
Submit to calculate. Your synastry chart opens with the biwheel and aspect matrix—the core of the reading.
If you want relocated overlays, enter one city and recalculate. The synastry chart will include partner-house context for that location.
Open Astrocartography for each person, compare lines, or launch AI synastry reading using your chart context (sign-in, credits).
One workflow: calculate, visualize, optionally relocate, map, and optionally add AI—so your synastry chart stays the single source of truth.
Conjunction, opposition, square, trine, and sextile with standard orbs—covering the dynamics readers expect in relationship astrology.
Whole-sign houses match our other tools, making it easier to compare your synastry chart with natal and relocation work on the same site.
Test one city to see how house topics shift when both charts are calculated for the same coordinates—without changing natal synastry aspects themselves.
See both line sets on one globe as a geographic complement—then open full maps for detail.
Turn your aspect list into plain-language themes with Astro Chat: same synastry data you just calculated, optional sign-in, and credits—helpful for wording, not a substitute for judgment or therapy.
Switch locales to read labels, steps, and help text in the language you prefer—while numeric results and chart logic stay consistent across the site.
Answers for readers who want a reliable synastry chart and a realistic reading process.
A synastry chart explains between-you dynamics; Astrocartography shows where lines emphasize each person on Earth. Continue with the same birth data for location intelligence.