Mass and Weight · Unit Converter

Convert Ratti to Dram (apothecary/troy)

Convert rattis to drams (apothecary/troy) instantly. 1 ratti = 0.0312505257 dram (apothecary/troy) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (apothecary/troy) to Ratti converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.
Mass and Weight category 2 min read Published Last reviewed Updated

Units explained

Indian / South Asian

Ratti

What is a ratti?

The ratti equals about 0.1215 gram, the smallest traditional South Asian weight.

Origin of the ratti

Based on the seed of the Gunja plant (Abrus precatorius), or 'raktika' in Sanskrit.

Where it is used

Gemstones and gold in Indian and South Asian jewelry.

When and where it was developed

One of the oldest weight units of the Indian subcontinent, later standardized.

Troy & Apothecary

Dram (apothecary/troy)

What is a dram (apothecary/troy)?

The apothecary (troy) dram equals one-eighth of a troy ounce, about 3.888 grams.

Origin of the dram (apothecary/troy)

From the apothecaries' system rooted in the Greek 'drachma'.

Where it is used

Historical pharmacy and medicine compounding.

When and where it was developed

Part of the apothecaries' system of weights used through the 19th century.

Ratti to Dram (apothecary/troy) conversion formula

Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.

The relationship between rattis and drams (apothecary/troy):

1 ratti = 0.0312505257 dr ap
1 dr ap = 31.9994617284 ratti

To convert rattis to drams (apothecary/troy), multiply the value in rattis by 0.0312505257. To reverse, multiply drams (apothecary/troy) by 31.9994617284.

How to use this converter

Type a value into the calculator. The result in drams (apothecary/troy) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Dram (apothecary/troy) to Ratti converter for the reverse direction.

Step-by-step: convert rattis to drams (apothecary/troy)

  1. Write down the value in rattis (ratti).
  2. Multiply that value by the factor 0.0312505257.
  3. The product is the equivalent value in drams (apothecary/troy) (dr ap).
  4. To reverse, multiply the dram (apothecary/troy) value by 31.9994617284.

Worked examples

Example 1 — Convert 1 ratti to dr ap:
1 × 0.0312505257 = 0.0312505257 dr ap

Example 2 — Convert 100 ratti to dr ap:
100 × 0.0312505257 = 3.1250525665 dr ap

Real-world example — Plastic film and laminate thickness

A 500-ratti sheet is a typical spec for ID-card laminates and film overlays. Converting to drams (apothecary/troy) aligns the value with the unit most CAD systems and material datasheets prefer.

500 ratti × 0.0312505257 = 15.6252628324 dr ap

Real-world example — Packaging gauge

A 4-ratti plastic bag thickness is a common spec for grocery and freezer bags. Converting from rattis to drams (apothecary/troy) is what packaging buyers do whenever they bridge US and metric supplier quotes.

4 ratti × 0.0312505257 = 0.1250021027 dr ap

Ratti to Dram (apothecary/troy) conversion table

Standard reference values for converting rattis to drams (apothecary/troy):

Ratti [ratti]Dram (apothecary/troy) [dr ap]
0.010.0003125053
0.10.0031250526
10.0312505257
20.0625010513
30.093751577
40.1250021027
50.1562526283
100.3125052566
200.6250105133
300.9375157699
401.2500210266
501.5625262832
1003.1250525665
50015.6252628324
100031.2505256647

Frequently asked questions

How many drams (apothecary/troy) is 1 ratti?
1 ratti equals 0.0312505257 dram (apothecary/troy).
How do I convert rattis to drams (apothecary/troy)?
Multiply the value in rattis by 0.0312505257 to get drams (apothecary/troy).
How do I convert drams (apothecary/troy) back to rattis?
Multiply the value in drams (apothecary/troy) by 31.9994617284, or use the Dram (apothecary/troy) to Ratti converter.
How many drams (apothecary/troy) is 100 rattis?
100 rattis equals 3.1250525665 drams (apothecary/troy), because 100 × 0.0312505257 = 3.1250525665.

Convert Ratti to other weight units

Show all Ratti conversions
Metric / SI (18 units)
Ratti to Attogram (ag) Ratti to Femtogram (fg) Ratti to Picogram (pg) Ratti to Nanogram (ng) Ratti to Microgram (µg) Ratti to Milligram (mg) Ratti to Centigram (cg) Ratti to Decigram (dg) Ratti to Gram (g) Ratti to Dekagram (dag) Ratti to Hectogram (hg) Ratti to Kilogram (kg) Ratti to Quintal (metric) (q) Ratti to Metric Ton (t) Ratti to Gigagram (Gg) Ratti to Teragram (Tg) Ratti to Petagram (Pg) Ratti to Exagram (Eg)
Avoirdupois (15 units)
Ratti to Grain (gr) Ratti to Dram (avoirdupois) (dr) Ratti to Ounce (oz) Ratti to Pound (lb) Ratti to Clove (clove) Ratti to Stone (US) (st) Ratti to Stone (UK) (st) Ratti to Quarter (US) (qr) Ratti to Quarter (UK) (qr) Ratti to Hundredweight (US) (cwt) Ratti to Hundredweight (UK) (cwt) Ratti to Wey (wey) Ratti to Kilopound (kip) (kip) Ratti to Ton (short, US) (sh tn) Ratti to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Ratti to Point (1/100 carat) (pt) Ratti to Carat (metric) (ct) Ratti to Scruple (apothecary) (s ap) Ratti to Pennyweight (dwt) Ratti to Momme (mom) Ratti to Mace (mace) Ratti to Dram (apothecary/troy) (dr ap) Ratti to Troy Ounce (oz t) Ratti to Tael (tael) Ratti to Pound (troy/apothecary) (lb t)
Indian / South Asian (5 units)
Ratti to Masha (masha) Ratti to Tola (tola) Ratti to Chittack (Chatank) (chittack) Ratti to Seer (Ser) (seer) Ratti to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Ratti to Electron Mass (rest) (me) Ratti to MeV/c2 (MeV/c²) Ratti to Muon Mass (mµ) Ratti to Atomic Mass Unit (u) Ratti to Proton Mass (mp) Ratti to Neutron Mass (mn) Ratti to Deuteron Mass (md) Ratti to Carbon-12 Atom Mass (C-12) Ratti to Planck Mass (mP)
Astronomical (4 units)
Ratti to Lunar Mass (Moon) (M☾) Ratti to Earth's Mass (M⊕) Ratti to Jupiter Mass (MJ) Ratti to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Ratti to Lepton (Biblical Roman) (lepton) Ratti to Quadrans (Biblical Roman) (quadrans) Ratti to Assarion (Biblical Roman) (assarion) Ratti to Gerah (Biblical Hebrew) (gerah) Ratti to Drachma (Biblical Greek) (drachma) Ratti to Denarius (Biblical Roman) (denarius) Ratti to Bekan (Biblical Hebrew) (bekah) Ratti to Didrachma (Biblical Greek) (didrachma) Ratti to Shekel (Biblical Hebrew) (shekel) Ratti to Tetradrachma (Biblical Greek) (tetra) Ratti to Mina (Biblical Greek) (mina) Ratti to Mina (Biblical Hebrew) (mina) Ratti to Talent (Biblical Greek) (talent) Ratti to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Ratti to Poundal (pdl) Ratti to Ton (assay) (US) (AT) Ratti to Ton (assay) (UK) (AT) Ratti to Kilogram-force square second/meter (hyl) Ratti to Slug (slug)

Sources & references

Conversion factor (1 ratti = 0.0312505257 dr ap) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.