Convert grains to UK tons

1 gr=6.3776e-8ton (UK)

Use the converter below to change any grains value into UK tons instantly — with formula, conversion table, and real-world examples.

You have

Equals

6.3776e-8

Conversion formula

Forward

UK tons = grains × 6.3776e-8

Reverse

grains = UK tons × 15,680,000

Example: 10 gr × 6.3776e-8 = 6.3776e-7 ton (UK).

About both units

From

Grain

The grain equals 64.79891 milligrams exactly, one of the oldest units of mass. Originally defined as the weight of a single grain of barley. Today used almost exclusively in firearms (bullet and gunpowder weights) and pharmaceuticals.

Real-world: A 9 mm bullet typically weighs 115–124 grains (7.45–8.03 g). Aspirin grain dosing: "5 grain aspirin" = 325 mg.

Read full grain reference →

UK Ton

ton (UK)

The UK long ton equals 2240 pounds or 1016.05 kilograms. It is the traditional British weight unit for shipping, steel and coal, and is 1.6% larger than the metric ton. Rarely used in modern commerce but appears on older contracts and historical records.

Real-world: Pre-1971 British ship displacements were given in long tons. UK steel output before EU harmonisation used long tons.

Read full uk ton reference →

Grain to UK Ton conversion table

Common grains to UK tons values for quick reference.

Grain (gr)	UK Ton (ton (UK))
1 gr	6.3776e-8 ton (UK)
5 gr	3.1888e-7 ton (UK)
10 gr	6.3776e-7 ton (UK)
25 gr	1.5944e-6 ton (UK)
50 gr	3.1888e-6 ton (UK)
100 gr	6.3776e-6 ton (UK)
250 gr	1.5944e-5 ton (UK)
500 gr	3.1888e-5 ton (UK)
1,000 gr	6.3776e-5 ton (UK)
5,000 gr	0.0003189 ton (UK)

Tips & common mistakes

Quick tips

1 grain = 64.79891 mg exactly. 7000 grains = 1 pound.
Ballistics is one of the few modern contexts where grains are essential.
Some older pharmacology dosing survives in grain units — 5 gr ≈ 325 mg.

Avoid these

Confusing the grain (mass) with the troy grain in older precious-metal contexts — they are identical (64.8 mg).
Assuming "grain" refers to an amount of cereal — in firearms it is always a weight.
Reading "5 gr" as 5 grams — it is 5 grains (324 mg).

Frequently asked questions

How many UK tons in a grain?

One grain equals 6.3776e-8 UK tons.

How do I convert grains to UK tons?

Multiply the grain value by 6.3776e-8 to get the equivalent in UK tons.

What is 100 grains in UK tons?

100 grains equals 6.3776e-6 UK tons.

Is a grain bigger than a uk ton?

No. 1 grain equals 6.3776e-8 UK tons, so one grain is smaller.

How to convert grains to UK tons without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

Related weight conversions

📊 See full comparison matrix →

Conversions in other categories

LengthKilometer → Mile TemperatureCelsius → Fahrenheit VolumeLiter → US Gallon AreaSquare Meter → Square Foot SpeedKilometer per Hour → Mile per Hour EnergyKilojoule → Kilocalorie PressureBar → Pound per Square Inch PowerKilowatt → Mechanical Horsepower