Ounces to grams converter
Convert ounces to grams, or grams to ounces, for recipes and packaging that weigh ingredients in the other system.
Result
Amount
Result
Amount
How to use this tool
- Choose oz → g or g → oz.
- Enter the weight.
- Read the converted weight. For pounds, enter pounds × 16 as ounces.
Assumptions
- Weight ounces only. Fluid ounces measure volume and differ between the US (≈29.6 ml) and UK (≈28.4 ml).
Sources & reference data
Technical details: what the fields mean
- Amount
ounces - Weight in avoirdupois ounces (oz), the everyday ounce used in UK and US recipes.
Methodology
1 ounce = 28.349523125 g exactly (1 pound = 16 oz = 453.59237 g). This tool uses 28.3495 g and rounds grams to 0.1 g and ounces to 0.01 oz.
Worked example
8 ounces
Inputs: Amount: 8 oz
Result: 226.8 g — half a pound.
1 pound of butter or mince
Inputs: Amount: 16 oz
Result: 453.6 g — a 454 g pack is the metric equivalent of 1 lb.
g → oz: a 250 g block of butter
Inputs: Amount: 250 g
Result: 8.82 oz — slightly more than the 8 oz many older recipes call for.
g → oz: 100 g of chocolate
Inputs: Amount: 100 g
Result: 3.53 oz.
Practical guidance
- Kitchen scales that switch between oz and g avoid conversion entirely — and are more accurate than cup measures.
- Older UK recipes often round 1 oz to 25 g or 30 g. Either works if you apply the same rounding to every ingredient, because the proportions stay the same.
Common mistakes
- Confusing weight ounces (oz) with fluid ounces (fl oz), which measure volume, not weight.
- Mixing exact conversions for some ingredients with rounded 25 g ounces for others, which changes the recipe's proportions.
FAQs
How many grams is 8 ounces?
About 226.8 grams.
How many ounces is 100g?
About 3.53 ounces.
How many grams in a pound?
453.59237 g exactly, usually rounded to 454 g.
Last reviewed: 2026-09-25
An exact weight conversion — not for fluid ounces, which measure volume.
Theme and tool preferences, along with saved and recently used lists, are stored only in this browser.