Convert Grain to Quintal (metric)
Convert grains to quintals (metric) instantly. 1 grain = 6.47989e-7 quintal (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Quintal (metric) to Grain converter for the reverse conversion.
Units explained
Grain
The grain (gr) equals 1/7000 of an avoirdupois pound, about 64.8 milligrams.
Based on the nominal mass of a single barley grain.
Ammunition and bullet mass, archery, and historical pharmacy.
Standardized through the English avoirdupois system and retained in 1959.
Quintal (metric)
The metric quintal (q) equals 100 kilograms.
From Latin 'centenarius' (hundredweight) via Arabic 'qintar'.
Agriculture across India, Europe, and Latin America for grain and produce.
Fixed at 100 kg with the spread of the metric system in the 19th century.
Grain to Quintal (metric) conversion formula
The relationship between grains and quintals (metric):
To convert grains to quintals (metric), multiply the value in grains by 6.47989e-7. To reverse, multiply quintals (metric) by 1543236.0734518645.
How to use this converter
Type a value into the calculator. The result in quintals (metric) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Quintal (metric) to Grain converter for the reverse direction.
Step-by-step: convert grains to quintals (metric)
- Write down the value in grains (gr).
- Multiply that value by the factor 6.47989e-7.
- The product is the equivalent value in quintals (metric) (q).
- To reverse, multiply the quintal (metric) value by 1543236.0734518645.
Worked examples
Example 1 — Convert 1 gr to q:
1 × 6.47989e-7 = 6.47989e-7 q
Example 2 — Convert 100 gr to q:
100 × 6.47989e-7 = 6.47989e-5 q
Real-world example — Plastic-film thickness alternates
A 150-grain plastic film converts cleanly to quintals (metric) — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 gr × 6.47989e-7 = 9.719835e-5 q
Real-world example — Hair-width scale measurements
A 70-grain measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like quintals (metric) for direct comparison across supplier datasheets.
70 gr × 6.47989e-7 = 4.535923e-5 q
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 grains), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 gr × 6.47989e-7 = 1.943967e-6 q
Grain to Quintal (metric) conversion table
Standard reference values for converting grains to quintals (metric):
| Grain [gr] | Quintal (metric) [q] |
|---|---|
| 0.01 | 6.47989e-9 |
| 0.1 | 6.47989e-8 |
| 1 | 6.47989e-7 |
| 2 | 1.295978e-6 |
| 3 | 1.943967e-6 |
| 4 | 2.591956e-6 |
| 5 | 3.239945e-6 |
| 10 | 6.47989e-6 |
| 20 | 1.295978e-5 |
| 30 | 1.943967e-5 |
| 40 | 2.591956e-5 |
| 50 | 3.239945e-5 |
| 100 | 6.47989e-5 |
| 500 | 0.0003239945 |
| 1000 | 0.000647989 |
Frequently asked questions
How many quintals (metric) is 1 grain?
How do I convert grains to quintals (metric)?
How do I convert quintals (metric) back to grains?
How many quintals (metric) is 100 grains?
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Metric / SI (18 units)
Avoirdupois (14 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 gr = 6.47989e-7 q) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.