Mass and Weight · Unit Converter

Convert Ratti to Pennyweight

Convert rattis to pennyweights instantly. 1 ratti = 0.0781263162 pennyweight — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pennyweight 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

Pennyweight

What is a pennyweight?

The pennyweight (dwt) equals one-twentieth of a troy ounce, 24 grains (about 1.555 g).

Origin of the pennyweight

From the mass of a medieval English silver penny; symbol dwt from 'denarius weight'.

Where it is used

Jewelry making and precious-metal scrap valuation in the US.

When and where it was developed

Derived from the medieval English coinage system.

Ratti to Pennyweight 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 pennyweights:

1 ratti = 0.0781263162 dwt
1 dwt = 12.7997843621 ratti

To convert rattis to pennyweights, multiply the value in rattis by 0.0781263162. To reverse, multiply pennyweights by 12.7997843621.

How to use this converter

Type a value into the calculator. The result in pennyweights updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pennyweight to Ratti converter for the reverse direction.

Step-by-step: convert rattis to pennyweights

  1. Write down the value in rattis (ratti).
  2. Multiply that value by the factor 0.0781263162.
  3. The product is the equivalent value in pennyweights (dwt).
  4. To reverse, multiply the pennyweight value by 12.7997843621.

Worked examples

Example 1 — Convert 1 ratti to dwt:
1 × 0.0781263162 = 0.0781263162 dwt

Example 2 — Convert 100 ratti to dwt:
100 × 0.0781263162 = 7.8126316171 dwt

Real-world example — Packaging gauge

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

4 ratti × 0.0781263162 = 0.3125052647 dwt

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 pennyweights aligns the value with the unit most CAD systems and material datasheets prefer.

500 ratti × 0.0781263162 = 39.0631580856 dwt

Ratti to Pennyweight conversion table

Standard reference values for converting rattis to pennyweights:

Ratti [ratti]Pennyweight [dwt]
0.010.0007812632
0.10.0078126316
10.0781263162
20.1562526323
30.2343789485
40.3125052647
50.3906315809
100.7812631617
201.5625263234
302.3437894851
403.1250526468
503.9063158086
1007.8126316171
50039.0631580856
100078.1263161712

Frequently asked questions

How many pennyweights is 1 ratti?
1 ratti equals 0.0781263162 pennyweight.
How do I convert rattis to pennyweights?
Multiply the value in rattis by 0.0781263162 to get pennyweights.
How do I convert pennyweights back to rattis?
Multiply the value in pennyweights by 12.7997843621, or use the Pennyweight to Ratti converter.
How many pennyweights is 100 rattis?
100 rattis equals 7.8126316171 pennyweights, because 100 × 0.0781263162 = 7.8126316171.

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 = 0.0781263162 dwt) verified against the following authoritative sources:

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