Grams to Ounces Calculator

Metric and avoirdupois mass converter

Convert grams and ounces

Convert grams to avoirdupois ounces or ounces to grams with the exact 28.349523125-gram mass relationship and direct equality.

Result

28.349523125 g = 1 oz

Reference relationship28.349523125 g = 1 oz exactly

Formula usedounces = grams ÷ 28.349523125

Unit relationship

28.349523125 g = 1 oz exactly

GramsSI mass unit equal to 10⁻³ kg.

Avoirdupois ouncesThe everyday mass ounce; 16 oz = 1 lb exactly.

The international avoirdupois ounce is exactly one-sixteenth of the international pound, or exactly 28.349523125 grams.

Worked example

Convert 28.349523125 g to oz

1
Start with the gram value
Use 28.349523125 g.
2
Apply the exact relationship
Divide the gram value by 28.349523125.
3
Write the avoirdupois ounce unit
28.349523125 g = 1 oz.

Quick reference

Grams to Avoirdupois ounces conversion table

Common g values converted to oz
Grams (g)	Avoirdupois ounces (oz)
1 g	0.03527396195 oz
5 g	0.176369809748 oz
10 g	0.352739619496 oz
25 g	0.88184904874 oz
28.349523125 g	1 oz
50 g	1.76369809748 oz
100 g	3.52739619496 oz
250 g	8.8184904874 oz
500 g	17.6369809748 oz
1,000 g	35.2739619496 oz

Mass-unit field guide

Grams to ounces starts with choosing the right ounce

A reliable grams-to-ounces conversion begins by identifying which ounce the source actually means, then preserves the exact avoirdupois relationship until the final display step.

Step-by-step guide · Mass-unit field guide

Build the answer from the exact avoirdupois definition

Exact relationship: 1 oz = 28.349523125 g
Forward operation: ounces = grams ÷ 28.349523125
Unit family: International avoirdupois mass

Keep the source amount in grams
For a 100 g item, retain 100 as the measured source value. Do not first round it to a convenient ounce estimate or mix it with a volume measurement from the package.
Divide by 28.349523125
The unrounded quotient is 3.527396194958... oz. The exact factor protects repeated calculations and lets the chosen display precision be applied only once.
Report only useful digits
A kitchen note may reasonably show 3.53 oz, while a manufacturing record may retain more places. Extra digits from the converter do not make the original scale more precise.

Grams to ounces starts with choosing the right ounce: NIST records one avoirdupois ounce as exactly 0.028349523125 kilogram, so the gram relationship is exact rather than an empirical estimate.

Identify the ounce before touching the number

The short symbol oz is not enough in every setting. An ounce on an everyday food package, kitchen scale, or parcel label normally means the avoirdupois mass ounce, which is the unit used here. A troy ounce is a different mass associated with precious metals, while a fluid ounce is a unit of volume. Treating those three names as interchangeable can produce a result that looks carefully calculated but answers the wrong question.

If the original label says fl oz, choose the fluid ounces to milliliters calculator and select U.S. or Imperial fluid ounces explicitly. If the material is a liquid and the task is to find its mass, the milliliters to grams calculator also needs an appropriate density. This page intentionally makes neither substitution in the background: it converts only grams and avoirdupois ounces of mass.

Build the answer from the exact avoirdupois definition

NIST records one avoirdupois ounce as exactly 0.028349523125 kilogram, so the gram relationship is exact rather than an empirical estimate.

Keep the source amount in grams
For a 100 g item, retain 100 as the measured source value. Do not first round it to a convenient ounce estimate or mix it with a volume measurement from the package.
Divide by 28.349523125
The unrounded quotient is 3.527396194958... oz. The exact factor protects repeated calculations and lets the chosen display precision be applied only once.
Report only useful digits
A kitchen note may reasonably show 3.53 oz, while a manufacturing record may retain more places. Extra digits from the converter do not make the original scale more precise.

Small masses reveal rounding choices quickly

Below one ounce, early rounding becomes especially visible. One gram is about 0.03527396 oz; rounding that immediately to 0.04 oz and multiplying it across many identical pieces can materially overstate the combined mass. A better workflow is to total the gram measurements, perform one conversion with the full factor, and round the final combined result for its intended use.

The reverse page has a different practical job. When a scale or package already starts in ounces and a metric record is required, use the ounces into grams calculator. Keeping the source direction visible makes an audit trail easier to follow and reduces the chance of multiplying where division was required.

Choose a follow-on tool from the real task

A converted ounce value is often an intermediate answer. The next calculator should follow the quantity being asked for, not merely reuse the nearest-looking unit label.

A total has grown beyond sixteen ounces

Move the unrounded ounce total into the ounces to pounds calculator to express it in the same avoirdupois family without introducing a second metric conversion.

A recipe asks for cups

A cup measures volume, so use the ingredient-aware grams to cups converter. It asks for an ingredient reference because flour, sugar, oil, and water cannot share one grams-per-cup value.

A precious-metal listing says troy ounce

Do not use this result. Return to the original specification and use a troy-mass conversion source; an avoirdupois answer would be a different quantity even though both units are spelled ounce.

Important limitations

This page converts non-negative avoirdupois mass only. It does not convert troy ounces, fluid volume, ingredient density, package tolerances, or scale uncertainty.

Review the stated scope, calculation method, assumptions, supported inputs, and effective dates, and obtain qualified advice before using a high-stakes result.

This formula passed its registered engineering tests and is published under an explicit site-owner policy authorization. No independent expert, QA, editorial, legal, or third-party review is claimed. Verify consequential results with a qualified professional.

Mass-unit field guide

Grams to ounces starts with choosing the right ounce

A reliable grams-to-ounces conversion begins by identifying which ounce the source actually means, then preserves the exact avoirdupois relationship until the final display step.

Step-by-step guide · Mass-unit field guide

Build the answer from the exact avoirdupois definition

Exact relationship: 1 oz = 28.349523125 g
Forward operation: ounces = grams ÷ 28.349523125
Unit family: International avoirdupois mass

Keep the source amount in grams
For a 100 g item, retain 100 as the measured source value. Do not first round it to a convenient ounce estimate or mix it with a volume measurement from the package.
Divide by 28.349523125
The unrounded quotient is 3.527396194958... oz. The exact factor protects repeated calculations and lets the chosen display precision be applied only once.
Report only useful digits
A kitchen note may reasonably show 3.53 oz, while a manufacturing record may retain more places. Extra digits from the converter do not make the original scale more precise.

Grams to ounces starts with choosing the right ounce: NIST records one avoirdupois ounce as exactly 0.028349523125 kilogram, so the gram relationship is exact rather than an empirical estimate.

Identify the ounce before touching the number

Build the answer from the exact avoirdupois definition

NIST records one avoirdupois ounce as exactly 0.028349523125 kilogram, so the gram relationship is exact rather than an empirical estimate.

Keep the source amount in grams
For a 100 g item, retain 100 as the measured source value. Do not first round it to a convenient ounce estimate or mix it with a volume measurement from the package.
Divide by 28.349523125
The unrounded quotient is 3.527396194958... oz. The exact factor protects repeated calculations and lets the chosen display precision be applied only once.
Report only useful digits
A kitchen note may reasonably show 3.53 oz, while a manufacturing record may retain more places. Extra digits from the converter do not make the original scale more precise.

Small masses reveal rounding choices quickly

Choose a follow-on tool from the real task

A converted ounce value is often an intermediate answer. The next calculator should follow the quantity being asked for, not merely reuse the nearest-looking unit label.

A total has grown beyond sixteen ounces

Move the unrounded ounce total into the ounces to pounds calculator to express it in the same avoirdupois family without introducing a second metric conversion.

A recipe asks for cups

A cup measures volume, so use the ingredient-aware grams to cups converter. It asks for an ingredient reference because flour, sugar, oil, and water cannot share one grams-per-cup value.

A precious-metal listing says troy ounce

Do not use this result. Return to the original specification and use a troy-mass conversion source; an avoirdupois answer would be a different quantity even though both units are spelled ounce.

28.349523125 g = 1 oz exactly

Convert 28.349523125 g to oz

Grams to Avoirdupois ounces conversion table

Keep the source amount in grams

Divide by 28.349523125

Report only useful digits

Identify the ounce before touching the number

Build the answer from the exact avoirdupois definition

Small masses reveal rounding choices quickly

Choose a follow-on tool from the real task

A total has grown beyond sixteen ounces

A recipe asks for cups

A precious-metal listing says troy ounce

Important limitations

28.349523125 g = 1 oz exactly

Convert 28.349523125 g to oz

Grams to Avoirdupois ounces conversion table

Keep the source amount in grams

Divide by 28.349523125

Report only useful digits

Identify the ounce before touching the number

Build the answer from the exact avoirdupois definition

Small masses reveal rounding choices quickly

Choose a follow-on tool from the real task

A total has grown beyond sixteen ounces

A recipe asks for cups

A precious-metal listing says troy ounce