Instant AnswerExact NIST Factor

1 Ounce to Grams = 28.3495 g (1 oz in grams)

Official conversion result, step-by-step mathematical proof, lookup chart, and UK stone & pound weight comparisons.

Direct Conversion Result1959 International Agreement

1 Ounce (oz) equals exactly 28.349523125 g (28.35 g). Formula: 1 oz × 28.349523 = 28.3495 g.

Instant Equation
1 Ounce (oz)=28.349523125 g
Exact Formula:1 oz × 28.349523 = 28.3495 g
Mathematical Proof

Step-by-Step Worked Solution

Unlike generic automated calculators that display only an isolated number, here is the verifiable mathematical process used to calculate 1 oz in g:

1

Identify the Conversion Standard

Identify the unit conversion factor: 1 oz × 28.349523 = 28.3495 g.

2

Apply the Mathematical Formula

Perform arithmetic: Multiply 1 oz by the conversion ratio to yield 28.349523125 g.

3

Rounding & Secondary Formats

Standard rounding: 28.35 g for everyday applications.

Reverse Conversion

28.349523125 g = 1 oz

Formula: Target ÷ conversion factor = source unit

Open Full Ounce to Grams Converter →

Proportional Multipliers for 1 oz

Easily scale up or down with standard ratios:

x2 (oz)
56.70 g
x4 (oz)
113.40 g
x8 (oz)
226.80 g (½ lb)
x12 (oz)
340.19 g
x16 (oz)
453.59 g (1 lb)
x32 (oz)
907.18 g (2 lbs)

Comprehensive Reference Tools & Charts

1 ounce equals roughly 28.35 grams. In baking, using a digital gram scale instead of measuring spoons gives consistent pastry perfection.

Interactive Ounce to Grams Calculator

Convert any custom number with step-by-step arithmetic and instant decimal control.

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Printable Reference Chart: Ounces to Grams Conversion Table (oz to g Chart)

View comprehensive increment lookup table with print & copy options.

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Related Quick Weight Benchmarks

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Instant calculations and conversions for nearby Ounce and Grams queries:

1 kg=1000 g1 oz=28.35 g1 kg=2.205 lbs1 lb=0.454 kg1 st=6.350 kg500 g=1.102 lbs

Frequently Asked Questions: 1 oz to g

1 Ounce (oz) equals exactly 28.349523125 g (rounded to 28.35 g). Under international metrology standards, this is calculated using the formula: 1 oz × 28.349523 = 28.3495 g.

The official conversion formula is: 1 oz × 28.349523 = 28.3495 g. To calculate the reverse, divide your target measurement by the same factor.

For quick mental estimates, multiply or divide using rounded benchmark ratios. For example, 1 stone is roughly 6.35 kg (or 14 lbs); 1 kg is roughly 2.2 lbs; and 1 ounce is roughly 28.35 grams.

This unit standard is governed by the 1959 International Yard and Pound Agreement, BIPM SI standards, and NIST guidelines, universally utilized in healthcare, fitness, aviation luggage, logistics, and cooking.

Measurement Standards & Accuracy

Standard Multipliers

Factors based on the 1959 International Yard and Pound Agreement and NIST SP 811.

Sources
  • BIPM Constant SI Standard
  • 1959 International Yard & Pound Agreement
  • NIST SP 811
Accuracy & Policy
Standard Exact Multipliers (e.g., 1 lb = 0.45359237 kg)
Reviewed: October 2026 • About our methodology →