---
title: "Grains to Ounces — gr to oz converter"
description: "1 grain = 0.0022857 ounces. Convert grains to ounces with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/grains-to-oz/
site: "At One Place"
---

# Grains to ounces

**1 grain in ounces: 1 gr = 0.0022857 oz**

oz = gr × 0.002285714286

To convert grains to ounces, multiply by 0.002285714286. The table below gives the values people look up most often, and the converter works for any number.

## Grains to ounces table

*Common grain values converted to ounces.*

| Grains | Ounces |
| --- | --- |
| 1 gr | 0.0022857 |
| 2 gr | 0.0045714 |
| 3 gr | 0.0068571 |
| 4 gr | 0.0091429 |
| 5 gr | 0.011429 |
| 10 gr | 0.022857 |
| 15 gr | 0.034286 |
| 20 gr | 0.045714 |
| 25 gr | 0.057143 |
| 30 gr | 0.068571 |
| 40 gr | 0.091429 |
| 50 gr | 0.11429 |
| 75 gr | 0.17143 |
| 100 gr | 0.22857 |
| 250 gr | 0.57143 |
| 500 gr | 1.142857 |
| 1,000 gr | 2.285714 |

## How the conversion works

The relationship is oz = gr × 0.002285714286. Both units measure mass, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

## Common questions

### How many ounces are in one grain?

One grain equals 0.0022857 ounces. oz = gr × 0.002285714286.

### How do you convert grains to ounces?

Use oz = gr × 0.002285714286. So 10 gr is 0.022857 oz.

### How many grains are in one ounce?

One ounce equals 437.5 grains, which is the reverse of the conversion above.

## Related pages

- [Ounces to Grains](https://atoneplace.net/convert/oz-to-grains/)
- [Grains to Kilograms](https://atoneplace.net/convert/grains-to-kg/)
- [Grains to Grams](https://atoneplace.net/convert/grains-to-grams/)
- [Grains to Milligrams](https://atoneplace.net/convert/grains-to-mg/)
- [Grains to Tonnes](https://atoneplace.net/convert/grains-to-tonnes/)
- [Grains to Pounds](https://atoneplace.net/convert/grains-to-lbs/)
- [Grains to Stone](https://atoneplace.net/convert/grains-to-stone/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)