The Shodasamsa (D16) chart is the divisional chart that divides each sign into sixteen parts of 1°52′30″ to show sukha, a person's relationship to material comfort and vehicles. It magnifies the fourth house of the birth chart. It measures whether possessions and surroundings actually settle a person, not how much they own.
The Shodasamsa is also written Shodashamsha or D-16 (षोडशांश). It is the sixteenth-part varga in the system laid out in Reading the Divisional Charts, a layer of your birth chart rather than a separate horoscope, and it is not the wealth chart, which the second and eleventh houses and the Hora (D2) address.
Two natives with identical means can have opposite Shodasamsa readings: the chart measures the relationship, not the quantity.
Shodasamsa (D16) at a glance
Fact
Detail
Also known as
Shodasamsa, Shodashamsha, D-16
Division
16 parts per sign
Arc per division
1°52′30″ (30° ÷ 16)
Primary subject
Sukha: comfort, vehicles, household ease
Magnifies
The natal 4th house
Counting anchor
Movable signs from Aries, fixed signs from Leo, dual signs from Sagittarius
Key significators
Venus (comfort as refinement), Moon (comfort as belonging)
Not to be confused with
Wealth (2nd/11th houses) or general contentment
What does sukha mean in the D16 chart?
Sukha is the condition of being at ease in one's material circumstances: a household that functions, a conveyance that reliably carries, surroundings that settle a person rather than agitate them. Rendered into English simply as "the chart for vehicles," the Shodasamsa sounds like an astrology of car purchases; rendered as "the chart for happiness," it claims something no divisional chart could deliver. Sukha sits between the two. The classical hierarchy of life's aims places material ease below dharma and moksha, but it does not dismiss it; it treats sukha as a genuine good, held in proportion to the larger goods around it.
The clearest way to state what the chart measures is this: two people with identical financial means can produce opposite D16 readings, because the chart is reading the relationship to what is owned, not the quantity of it.
How to calculate the D16 chart
Each thirty-degree sign divides into sixteen parts of 1°52′30″ (1.875°), and where a part maps depends on the type of sign. Charts on this site use the sidereal zodiac with the Lahiri ayanamsha and the Swiss Ephemeris; the method is described under /tools.
Enter your birth date, time and place in the Lagna calculator to get the sign and degree of your Lagna and every planet.
Divide the degree inside the sign by 1.875 and round up. That is the part number, from 1 to 16.
Pick the anchor by sign type. Movable signs (Aries, Cancer, Libra, Capricorn) count from Aries. Fixed signs (Taurus, Leo, Scorpio, Aquarius) count from Leo. Dual signs (Gemini, Virgo, Sagittarius, Pisces) count from Sagittarius.
Count forward from the anchor by the part number, counting the anchor as 1 and wrapping through the zodiac as needed. That sign is the D16 sign.
The three anchors are the three fire signs taken in the order the zodiac introduces them, matched to movable, fixed and dual. That pattern is also a check: if a stated anchor is not one of the three fire signs, the rule has been misapplied.
A worked example. A Lagna at 22°40′ Libra. Libra is movable, so the count starts from Aries. 22.667 ÷ 1.875 = 12.09, which rounds up to part 13. Counting thirteen signs from Aries wraps once around the zodiac and lands on Aries again. The rashi Lagna of accommodating, balance-seeking Libra sits against a D16 lagna of Aries, ruled by Mars: this native's actual relationship to material surroundings is more acquisitive and direct than their outward manner suggests.
Why is the fourth house at the centre of the D16?
The Shodasamsa magnifies the natal fourth house, the classical sukha-bhava, which governs the dwelling, the mother, the emotional floor of daily life and the conveyances that make ordinary movement possible. A chart built to amplify that house reaches beyond literal vehicles into the whole texture of a home, which is why reading the D16 only as "the vehicle chart" wastes most of what it offers. The house is covered in Fourth House: Home and Mother.
Vehicles hold their classical prominence for a historical reason: in an agrarian society, a durable conveyance such as a horse or a carriage was the visible marker of a household that had crossed from subsistence into stability. The category has since expanded to cars, motorcycles and the air travel a diaspora life depends on, but the underlying signification is unchanged: the D16 reads the material conditions that let the rest of a life proceed.
What should you read first in a D16 chart?
Four elements carry most of the interpretation. The D16 lagna sets the register in which a native relates to their surroundings. The fourth house of the D16 is the seat of the sukha reading itself. Venus is the natural significator of cultivated comfort: possessions chosen with care, an aesthetic sensibility in how a home is kept. The Moon is the natural significator of comfort as belonging: whether a dwelling functions as an emotional anchor rather than simply a shelter.
Other planets contribute their own register when placed in the lagna or the fourth house. Jupiter tends toward comfort with a purpose beyond the self, such as a home used for hospitality. Mercury tends toward comfort as a well-organised system, and the Sun toward comfort as a marker of standing. Mars tends toward comfort acquired quickly and instrumentally, with the classical caution that Mars here is also associated with conveyance accidents and domestic friction. Saturn tends toward comfort deferred: long restriction followed by durable acquisition, often describing a comfortable old age rather than a comfortable youth.
What does a full D16 reading look like? A worked chart
Take the native above, with the Lagna at 22°40′ Libra (D16 lagna Aries), Venus at 9°50′ Scorpio and the Moon at 27°05′ Gemini.
Venus. Scorpio is a fixed sign, so the count starts from Leo. 9.833 ÷ 1.875 = 5.24, the sixth part. Counting six signs from Leo (Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn) lands on Capricorn, the tenth sign from the D16 lagna. Venus, the significator of comfort itself, sits in the house of public standing: what this native acquires is acquired partly for what it signals. Venus in Capricorn, a friendly sign for Venus, means the faculty for cultivated comfort works well, simply pointed outward rather than inward.
The Moon. Gemini is a dual sign, so the count starts from Sagittarius. 27.083 ÷ 1.875 = 14.44, the fifteenth part. Counting fifteen from Sagittarius wraps and lands on Aquarius, the eleventh house from the D16 lagna. The Moon governing emotional belonging sitting in the eleventh rather than the fourth is a specific finding: this native's sense of being at home is tied to their chosen circle of friends rather than to family or a physical place.
How does dasha timing work with the D16?
The Vimshottari periods of planets well placed in the D16 (Venus, the Moon, the fourth lord or the D16 lagna lord) are the stretches classically read as bringing conveyance and household matters forward. Venus's twenty years are the longest and most characteristic of these; where the D16 supports it, this is the period in which a native's material surroundings tend to reach their most developed, cultivated form. The chart does not name a specific purchase, a specific month or a specific accident. It describes constitutional pattern, and the choices remain the native's own.
What are the common misreadings of the D16?
Reading it as a purchase oracle asks it to name a month or a model, which it cannot do. Asking it about wealth confuses it with the second and eleventh houses and the classical dhana yogas, which read wealth specifically; the D16 reads the relationship to material conditions, a different and often uncorrelated quantity. Asking it about contentment overreaches in the other direction, since no chart in the system claims to deliver a verdict on happiness. And reading an obstructed D16 as poverty mistakes texture for quantity: a difficult D16 in a materially comfortable life usually describes someone who does not enjoy what they have, a real condition worth naming honestly rather than a statement about their bank balance.
Which divisional charts is the D16 read alongside?
For a fuller picture of material circumstance, the D16 is often read alongside the Navamsa (D9), since a household's comfort is inseparable from the marriage that shares it, and against the Trimshamsa (D30) when the question concerns whether comfort is being disrupted by misfortune rather than simply absent.
Where to find your D16 lagna, Venus and Moon
Working out sixteen divisions by hand takes several careful steps for each planet, and each part is only 1°52′30″ wide, so a planet near a part boundary is worth checking against your birth time. The Lagna calculator gives you the degrees to apply the four steps above. The full reading at /kundli/new calculates your D16 chart automatically alongside your natal fourth house, so you can see your own lagna, Venus and Moon placements directly.
Frequently asked questions
What does the Shodasamsa (D16) chart show?
The Shodasamsa is the Vedic astrology divisional chart read for sukha: material comfort, vehicles and the ease of daily surroundings. It magnifies the natal fourth house and is read through its own lagna, its fourth house, and the placements of Venus and the Moon.
Is the D16 chart only about vehicles?
No. Vehicles are its most literal historical association, but the chart magnifies the entire fourth house, which also covers the home, domestic comfort and the general conditions that let daily life proceed smoothly. Reading it only for vehicles misses most of what it offers, including the native's felt sense of being settled.
How is the Shodasamsa chart calculated?
Each 30° sign is divided into sixteen parts of 1°52′30″. Movable signs count from Aries, fixed signs from Leo and dual signs from Sagittarius, wrapping through the zodiac as needed. Divide the degree in the sign by 1.875, round up, and count that many signs from the anchor.
Can the Shodasamsa chart predict wealth?
No. Wealth is read primarily through the second and eleventh houses and the classical dhana yogas. The Shodasamsa reads a native's relationship to material comfort, which is a different question and is often uncorrelated with the size of their wealth. It is not investment or financial advice.
Why can two people with the same income have different D16 readings?
Because the chart measures the relationship to material comfort, not its quantity. One native may feel settled and at ease with modest means while another with considerably more stays agitated by their surroundings. The D16 lagna, fourth house, Venus and Moon describe that difference.
When does the D16 chart matter most for timing a purchase?
Classical practice looks to the Vimshottari Mahadasha and Antardasha of whichever planets are well placed in the D16, most often Venus, the Moon or the fourth lord. A Venus period well supported by the D16 is the most commonly cited stretch for a household or vehicle to reach its most developed form.
