Mass and Weight · Unit Converter

Convert Grain to Mace

Convert grains to maces instantly. 1 grain = 0.0171428564 mace — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Mace to Grain 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

Avoirdupois

Grain

What is a grain?

The grain (gr) equals 1/7000 of an avoirdupois pound, about 64.8 milligrams.

Origin of the grain

Based on the nominal mass of a single barley grain.

Where it is used

Ammunition and bullet mass, archery, and historical pharmacy.

When and where it was developed

Standardized through the English avoirdupois system and retained in 1959.

Troy & Apothecary

Mace

What is a mace?

The mace equals one-tenth of a tael, about 3.78 grams.

Origin of the mace

From the Chinese 'qian'; 'mace' is the European trade name.

Where it is used

Chinese and Southeast Asian gold and traditional-medicine trade.

When and where it was developed

Part of the traditional Chinese tael system.

Grain to Mace 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 grains and maces:

1 gr = 0.0171428564 mace
1 mace = 58.3333359054 gr

To convert grains to maces, multiply the value in grains by 0.0171428564. To reverse, multiply maces by 58.3333359054.

How to use this converter

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

Step-by-step: convert grains to maces

  1. Write down the value in grains (gr).
  2. Multiply that value by the factor 0.0171428564.
  3. The product is the equivalent value in maces (mace).
  4. To reverse, multiply the mace value by 58.3333359054.

Worked examples

Example 1 — Convert 1 gr to mace:
1 × 0.0171428564 = 0.0171428564 mace

Example 2 — Convert 100 gr to mace:
100 × 0.0171428564 = 1.7142856387 mace

Real-world example — Plastic film and laminate thickness

A 500-grain sheet is a typical spec for ID-card laminates and film overlays. Converting to maces aligns the value with the unit most CAD systems and material datasheets prefer.

500 gr × 0.0171428564 = 8.5714281935 mace

Real-world example — Packaging gauge

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

4 gr × 0.0171428564 = 0.0685714255 mace

Grain to Mace conversion table

Standard reference values for converting grains to maces:

Grain [gr]Mace [mace]
0.010.0001714286
0.10.0017142856
10.0171428564
20.0342857128
30.0514285692
40.0685714255
50.0857142819
100.1714285639
200.3428571277
300.5142856916
400.6857142555
500.8571428193
1001.7142856387
5008.5714281935
100017.142856387

Frequently asked questions

How many maces is 1 grain?
1 grain equals 0.0171428564 mace.
How do I convert grains to maces?
Multiply the value in grains by 0.0171428564 to get maces.
How do I convert maces back to grains?
Multiply the value in maces by 58.3333359054, or use the Mace to Grain converter.
How many maces is 100 grains?
100 grains equals 1.7142856387 maces, because 100 × 0.0171428564 = 1.7142856387.

Convert Grain to other weight units

Show all Grain conversions
Metric / SI (18 units)
Grain to Attogram (ag) Grain to Femtogram (fg) Grain to Picogram (pg) Grain to Nanogram (ng) Grain to Microgram (µg) Grain to Milligram (mg) Grain to Centigram (cg) Grain to Decigram (dg) Grain to Gram (g) Grain to Dekagram (dag) Grain to Hectogram (hg) Grain to Kilogram (kg) Grain to Quintal (metric) (q) Grain to Metric Ton (t) Grain to Gigagram (Gg) Grain to Teragram (Tg) Grain to Petagram (Pg) Grain to Exagram (Eg)
Avoirdupois (14 units)
Grain to Dram (avoirdupois) (dr) Grain to Ounce (oz) Grain to Pound (lb) Grain to Clove (clove) Grain to Stone (US) (st) Grain to Stone (UK) (st) Grain to Quarter (US) (qr) Grain to Quarter (UK) (qr) Grain to Hundredweight (US) (cwt) Grain to Hundredweight (UK) (cwt) Grain to Wey (wey) Grain to Kilopound (kip) (kip) Grain to Ton (short, US) (sh tn) Grain to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Grain to Point (1/100 carat) (pt) Grain to Carat (metric) (ct) Grain to Scruple (apothecary) (s ap) Grain to Pennyweight (dwt) Grain to Momme (mom) Grain to Mace (mace) Grain to Dram (apothecary/troy) (dr ap) Grain to Troy Ounce (oz t) Grain to Tael (tael) Grain to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Grain to Ratti (ratti) Grain to Masha (masha) Grain to Tola (tola) Grain to Chittack (Chatank) (chittack) Grain to Seer (Ser) (seer) Grain to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Grain to Electron Mass (rest) (me) Grain to MeV/c2 (MeV/c²) Grain to Muon Mass (mµ) Grain to Atomic Mass Unit (u) Grain to Proton Mass (mp) Grain to Neutron Mass (mn) Grain to Deuteron Mass (md) Grain to Carbon-12 Atom Mass (C-12) Grain to Planck Mass (mP)
Astronomical (4 units)
Grain to Lunar Mass (Moon) (M☾) Grain to Earth's Mass (M⊕) Grain to Jupiter Mass (MJ) Grain to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Grain to Lepton (Biblical Roman) (lepton) Grain to Quadrans (Biblical Roman) (quadrans) Grain to Assarion (Biblical Roman) (assarion) Grain to Gerah (Biblical Hebrew) (gerah) Grain to Drachma (Biblical Greek) (drachma) Grain to Denarius (Biblical Roman) (denarius) Grain to Bekan (Biblical Hebrew) (bekah) Grain to Didrachma (Biblical Greek) (didrachma) Grain to Shekel (Biblical Hebrew) (shekel) Grain to Tetradrachma (Biblical Greek) (tetra) Grain to Mina (Biblical Greek) (mina) Grain to Mina (Biblical Hebrew) (mina) Grain to Talent (Biblical Greek) (talent) Grain to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Grain to Poundal (pdl) Grain to Ton (assay) (US) (AT) Grain to Ton (assay) (UK) (AT) Grain to Kilogram-force square second/meter (hyl) Grain to Slug (slug)

Sources & references

Conversion factor (1 gr = 0.0171428564 mace) verified against the following authoritative sources:

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