Gram to Grain Conversion Calculator: Free Online Tool

Convert grams to grains with our free online weight converter.

From:

Gram

To:

Grain

How to Use the Calculator:

Enter the value you want to convert in the 'From' field (Gram).
The converted value in Grain will appear automatically in the 'To' field.
Use the dropdown menus to select different units within the Weight category.
Click the swap button (⇌) to reverse the conversion direction.

How to Convert Gram to Grain

Converting Gram to Grain involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

1 Gram = 15.4324 grains

Example Calculation:

Convert 5 grams: 5 × 15.4324 = 77.162 grains

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

What is a Gram and a Grain?

The gram is a unit of mass in the metric system. Originally defined as the mass of one cubic centimeter of water at its maximum density, it is now defined as 1/1000 of a kilogram.

The grain (gr) is a unit of mass in the traditional English weight systems (Avoirdupois, Troy, and Apothecaries'). It was originally based on the weight of a single grain of barley. It is defined as exactly 64.79891 milligrams (or 1/7000 of an avoirdupois pound).

Note: The Gram is part of the metric (SI) system, primarily used globally in science and trade. The Grain belongs to the imperial/US customary system.

History of the Gram and Grain

Introduced in France after the French Revolution as part of the metric system. It became a fundamental unit for scientific measurement.

The grain is one of the oldest units of mass, dating back to antiquity, using seeds (like barley or wheat) as weight standards. It formed the legal basis for English weight systems and remains defined in terms of metric units today.

Common Uses for grams and grains

Explore the typical applications for both Gram (metric) and Grain (imperial/US) to understand their common contexts.

Common Uses for grams

Cooking & Baking: Standard unit worldwide for measuring dry ingredients like flour, sugar, spices, and non-liquid items like butter.
Groceries: Used for labeling the net weight of many packaged food products (e.g., cereal boxes, canned goods, snacks).
Science: Common unit for mass measurements in chemistry labs, biology, and physics experiments.
Jewelry & Precious Metals: Often used to measure the weight of gold, silver, and gemstones.
Postal Services: Used globally for determining the weight and cost of letters and small parcels.

Common Uses for grains

Ammunition: Measuring the mass of bullets and gunpowder charges.
Archery: Measuring the mass of arrows and arrowheads.
Medicine & Pharmacy: Historically used in the apothecaries' system; sometimes still used for measuring dosage of certain older medications (e.g., aspirin).
Jewelry: Used in the troy system (24 grains = 1 pennyweight).
Reloading: Handloading ammunition requires precise measurement in grains.

Frequently Asked Questions

Questions About Gram (g)

Is the gram part of the metric system?

Yes, the gram (g) is a fundamental unit of mass in the metric system, equivalent to 1/1000 of a kilogram.

What is a gram commonly used for?

It's widely used for measuring small masses, especially in cooking, groceries, science labs, and for weighing precious metals.

How many grams are in a kilogram?

There are exactly 1000 grams (g) in 1 kilogram (kg).

About Grain (gr)

How many grains are in an ounce (avoirdupois)?

There are 437.5 grains (gr) in 1 avoirdupois ounce (oz).

How many grains are in a pound (avoirdupois)?

There are 7,000 grains (gr) in 1 avoirdupois pound (lb).

How many milligrams are in a grain?

There are exactly 64.79891 milligrams (mg) in 1 grain (gr).

Conversion Table: Gram to Grain

Gram (g)	Grain (gr)
1	15.432
5	77.162
10	154.324
25	385.809
50	771.618
100	1,543.236
500	7,716.179
1,000	15,432.358

All Weight Conversions

Kilogram to Gram Kilogram to Milligram Kilogram to Pound Kilogram to Ounce Kilogram to Stone Kilogram to Ton (metric)Kilogram to Ton (US)Kilogram to Ton (UK)Kilogram to Microgram Kilogram to Carat Kilogram to Slug Kilogram to Troy Ounce Kilogram to Pennyweight Kilogram to Grain Kilogram to Dram Kilogram to Quintal Kilogram to Atomic Mass Unit Kilogram to Pavan (India)Kilogram to Kati (India)Kilogram to Masha (India)Kilogram to Dina (India)Kilogram to Pras (India)Kilogram to Lota (India)Gram to Kilogram Gram to Milligram Gram to Pound Gram to Ounce Gram to Stone Gram to Ton (metric)Gram to Ton (US)Gram to Ton (UK)Gram to Microgram Gram to Carat Gram to Slug Gram to Troy Ounce Gram to Pennyweight Gram to Dram Gram to Quintal Gram to Atomic Mass Unit Gram to Pavan (India)Gram to Kati (India)Gram to Masha (India)Gram to Dina (India)Gram to Pras (India)Gram to Lota (India)Milligram to Kilogram Milligram to Gram Milligram to Pound Milligram to Ounce Milligram to Stone Milligram to Ton (metric)Milligram to Ton (US)Milligram to Ton (UK)Milligram to Microgram Milligram to Carat Milligram to Slug Milligram to Troy Ounce Milligram to Pennyweight Milligram to Grain Milligram to Dram Milligram to Quintal Milligram to Atomic Mass Unit Milligram to Pavan (India)Milligram to Kati (India)Milligram to Masha (India)Milligram to Dina (India)Milligram to Pras (India)Milligram to Lota (India)Pound to Kilogram Pound to Gram Pound to Milligram Pound to Ounce Pound to Stone Pound to Ton (metric)Pound to Ton (US)Pound to Ton (UK)Pound to Microgram Pound to Carat Pound to Slug Pound to Troy Ounce Pound to Pennyweight Pound to Grain Pound to Dram Pound to Quintal Pound to Atomic Mass Unit Pound to Pavan (India)Pound to Kati (India)Pound to Masha (India)Pound to Dina (India)Pound to Pras (India)Pound to Lota (India)Ounce to Kilogram Ounce to Gram Ounce to Milligram Ounce to Pound Ounce to Stone Ounce to Ton (metric)Ounce to Ton (US)Ounce to Ton (UK)Ounce to Microgram Ounce to Carat Ounce to Slug Ounce to Troy Ounce Ounce to Pennyweight Ounce to Grain Ounce to Dram Ounce to Quintal Ounce to Atomic Mass Unit Ounce to Pavan (India)Ounce to Kati (India)Ounce to Masha (India)Ounce to Dina (India)Ounce to Pras (India)Ounce to Lota (India)Stone to Kilogram Stone to Gram Stone to Milligram Stone to Pound Stone to Ounce Stone to Ton (metric)