Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 gr | 6.480e-11 t | |
| 0.01 gr | 6.480e-10 t | |
| 0.1 gr | 6.48e-09 t | |
| 1 gr | 6.48e-08 t | |
| 5 gr | 3.24e-07 t | |
| 10 gr | 6.48e-07 t | |
| 50 gr | 3.24e-06 t | |
| 100 gr | 6.48e-06 t | |
| 1000 gr | 6.48e-05 t |
The Milligram (mg) and the Gram (g) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 gr = 6.480000e-8 t
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Grain (gr) | Metric Ton (t) | Real-world context |
|---|---|---|
| 1 gr | 6.4800e-08 t | grain of wheat |
| 1000 gr | 6.4800e-05 t | |
| 1,000,000 gr | 0.0648 t | |
| 1.0000e+09 gr | 64.8 t | |
| 1.0000e+12 gr | 64800 t |
1 grain (gr) equals exactly 6.4800e-08 metric tons (t). Use the formula: gr × 6.4800e-08 = t.
To convert grains to metric tons, multiply your value in grains by 6.4800e-08. For example, 5 gr × 6.4800e-08 = 3.2400e-07 t.
100 grains = 6.4800e-06 metric tons. Calculation: 100 × 6.4800e-08 = 6.4800e-06.
To convert metric tons back to grains, divide by 6.4800e-08 (or multiply by 15,432,099). Example: 10 t ÷ 6.4800e-08 = 154,320,988 gr.
Yes. This converter uses the internationally recognised exact conversion factor: 1 gr = 6.4800e-08 t. All calculations are performed in your browser with no rounding until display.
10 grains = 6.4800e-07 metric tons. Simply multiply by 6.4800e-08.
Converting grains to metric tons is commonly needed for jewellery valuation, gemstone trading, precious metal buying and selling, and hallmarking compliance where one system uses gr and another uses t.
The grain (gr) is the smallest unit in the avoirdupois, troy, and apothecary weight systems, equal to exactly 64.79891 milligrams (0.06479891 g). All three systems share the same grain as base: one avoirdupois pound = 7,000 grains; one troy pound = 5,760 grains. The grain is still used in ballistics (bullet and powder weights) and some pharmaceutical contexts.
The metric ton (tonne, symbol t) equals exactly 1,000 kilograms or 1,000,000 grams. Not an SI unit but derived from the kilogram, it is used globally for large-scale measurements in shipping, agriculture, mining, and manufacturing. In the US, "metric ton" or "tonne" distinguishes it from the US short ton (2,000 lb ≈ 907 kg) and UK long ton (2,240 lb ≈ 1,016 kg).
The grain is among the oldest measurement units in history, derived from the average weight of a grain of barleycorn (or wheat) — a practical standard used in ancient Egypt, Greece, and Rome. England formalised the barleycorn grain in the 15th century as the foundation of its weight system. The British Weights and Measures Act 1824 defined the grain, and the value remains unchanged today.
Interesting fact: The original grain was calibrated by laying dried barleycorns end-to-end — 32 grains equalled one inch in 13th-century England. Today, 9mm pistol bullets typically weigh 115–147 grains (7.5–9.5 g), and gunpowder charges are specified in grains for reloading.
The tonne was introduced alongside the metric system in late 18th-century France and incorporated into the International System as an accepted non-SI unit. Its name (with final "e") was adopted to avoid confusion with British and American ton units. As international trade standardised on metric units through the 20th century, the metric ton became the global benchmark for commodity markets in grain, oil, steel, and other bulk goods.
Interesting fact: A standard ISO shipping container (20-foot TEU) can carry approximately 21–24 metric tons of cargo. The global annual steel production is about 1.9 billion metric tons — roughly 240 kg for every person on Earth.