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Convert Ounces to Grams

Enter weight in ounces to convert to grams. Perfect for converting American recipes to UK metric measurements.

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grams (g)
Rounded: 0g for cooking

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Convert Grams to Ounces

Enter weight in grams to convert to ounces. Useful when following UK recipes that need to be converted to American measurements.

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ounces (oz)
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Batch Converter

Convert multiple values at once. Enter one value per line. Prefix with "g" for grams or "oz" for ounces.

Recipe Scaler

Scale recipe quantities up or down. Great for adjusting American recipes for UK serving sizes.

Common Ounces to Grams Conversions

Quick reference for the most common cooking conversions used in UK kitchens.

Ounces Grams (exact) Grams (rounded) Common Use
1 oz28.35g28g or 30gSmall portion, 1 slice cheese
2 oz56.70g55g or 60gCheese portion, small handful nuts
3 oz85.05g85gServing of meat/fish
4 oz (1/4 lb)113.40g110g or 115gUS butter stick, small portion
5 oz141.75g140gYogurt pot size
6 oz170.10g170g or 175gMedium portion
7 oz198.45g200g~200g metric
8 oz (1/2 lb)226.80g225g or 230gHalf pound, 2 US butter sticks
10 oz283.50g280g or 285g-
12 oz (3/4 lb)340.19g340g or 350gThree-quarter pound
14 oz396.89g400gStandard UK tin size
16 oz (1 lb)453.59g450g or 454gOne pound

Grams to Ounces Quick Reference

Common metric weights used in UK recipes with their imperial equivalents.

Grams Ounces (exact) Ounces (rounded) Pounds & Ounces
25g0.88 oz~1 oz-
50g1.76 oz~2 oz-
75g2.65 oz~2.5 oz-
100g3.53 oz~3.5 oz-
125g4.41 oz~4.5 oz-
150g5.29 oz~5.25 oz-
175g6.17 oz~6 oz-
200g7.05 oz~7 oz-
225g7.94 oz~8 oz1/2 lb
250g8.82 oz~9 oz-
350g12.35 oz~12 oz3/4 lb
450g15.87 oz~16 oz1 lb
500g17.64 oz~17.5 oz1 lb 1.5 oz
1000g (1 kg)35.27 oz~35.25 oz2 lb 3.25 oz

Common UK Baking Ingredient Weights

Different ingredients have different densities, so cup measurements vary. Always weigh ingredients for accuracy.

Butter & Fats

  • 1 US stick butter = 113g (4 oz)
  • 1 cup butter = 227g (8 oz)
  • 1 tbsp butter = 14g (0.5 oz)
  • 1 cup vegetable oil = 224g
  • 1 cup lard = 205g

Flour

  • 1 cup plain flour = 125g (4.4 oz)
  • 1 cup self-raising = 125g (4.4 oz)
  • 1 cup bread flour = 127g
  • 1 cup wholemeal = 120g
  • 1 cup cornflour = 128g

Sugars

  • 1 cup caster sugar = 200g (7 oz)
  • 1 cup granulated = 200g (7 oz)
  • 1 cup brown sugar = 220g (packed)
  • 1 cup icing sugar = 120g (4.2 oz)
  • 1 cup demerara = 220g

Dairy

  • 1 cup milk = 240ml (8.5 fl oz)
  • 1 cup cream = 240ml
  • 1 cup yogurt = 245g
  • 1 cup cream cheese = 225g
  • 1 cup sour cream = 240g

Liquids & Syrups

  • 1 cup honey = 340g (12 oz)
  • 1 cup golden syrup = 340g
  • 1 cup maple syrup = 315g
  • 1 cup treacle = 340g
  • 1 cup water = 237ml

Nuts & Seeds

  • 1 cup almonds (whole) = 145g
  • 1 cup ground almonds = 110g
  • 1 cup walnuts = 120g
  • 1 cup pecans = 110g
  • 1 cup desiccated coconut = 85g

Conversion Formulas

Ounces to Grams

Grams = Ounces x 28.3495

Example: 8 oz x 28.35 = 226.8g (round to 225g)

Grams to Ounces

Ounces = Grams / 28.3495

Example: 250g / 28.35 = 8.82 oz (round to 9 oz)

Quick Mental Maths

1 oz ~ 30g (rough)
100g ~ 3.5 oz

For quick estimates, multiply oz by 30 or divide grams by 30.

Troy Ounces vs Cooking Ounces

There are two types of ounces you may encounter:

Avoirdupois Ounces (Cooking)

1 oz = 28.3495 grams

  • Used for cooking and baking
  • Used in UK/US everyday weighing
  • 16 oz = 1 pound
  • This converter uses avoirdupois

Troy Ounces (Precious Metals)

1 troy oz = 31.1035 grams

  • Used for gold, silver, platinum
  • Used in jewellery and bullion
  • 12 troy oz = 1 troy pound
  • NOT for cooking conversions

Weight Ounces vs Fluid Ounces

Don't confuse weight ounces (oz) with fluid ounces (fl oz) - they measure different things!

Measurement What It Measures Value Used For
1 oz (weight)Mass/Weight28.35 gramsDry ingredients, butter, cheese
1 UK fl oz (volume)Volume28.41 mlLiquids in UK recipes
1 US fl oz (volume)Volume29.57 mlLiquids in American recipes
1 UK cupVolume284 ml (10 fl oz)Older UK recipes (rarely used)
1 US cupVolume237 ml (8 fl oz)American recipes

UK Baking Tip

For liquids, the weight in grams is approximately equal to the volume in millilitres (1ml water ~ 1g). For dry ingredients, always weigh in grams using digital scales - never use cup measures for accuracy!

How to Convert Ounces to Grams

This converter provides instant, accurate results for your measurement conversions. The UK uses a mix of metric and imperial measurements in daily life, which can make conversions a frequent necessity. Road signs use miles, food is sold in grams and kilograms, and height is often quoted in feet and inches despite the metric system being the official standard.

Understanding the conversion formula helps verify results and perform quick mental calculations when a tool is not available.

Key Information

Common UK conversion factors: 1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 mile = 1.609 km, 1 pound (lb) = 0.4536 kg, 1 stone = 6.35 kg, 1 pint (UK) = 568 ml, 1 gallon (UK) = 4.546 litres, 1 acre = 0.4047 hectares. Temperature conversions use the formula: Celsius = (Fahrenheit - 32) x 5/9.

Example Calculation

To convert 5 feet 10 inches to centimetres: first convert to total inches (5 x 12 + 10 = 70 inches), then multiply by 2.54 to get 177.8 cm. For weight, a person weighing 12 stone 7 lbs is 12.5 stone, which equals 79.4 kg (12.5 x 6.35).

Source: Based on international measurement standards. Last updated March 2026.

Frequently Asked Questions

How many grams in an ounce for UK cooking?
1 ounce (oz) equals 28.3495 grams. For UK cooking and baking, this is typically rounded to 28g or 30g depending on the precision needed. This is the avoirdupois ounce used in everyday cooking - troy ounces (31.1g) are only used for precious metals and are NOT suitable for recipe conversions.
What is 8 oz in grams for baking?
8 ounces equals 226.8 grams, typically rounded to 225g or 230g in UK recipes. 8 oz is half a pound (1/2 lb) and is a very common measurement in American baking recipes, equivalent to 2 US sticks of butter. This is a standard measurement for many cake and cookie recipes.
How do I convert American recipes to UK measurements?
American recipes use cups and ounces while UK recipes use grams and millilitres. To convert: multiply ounces by 28.35 for grams. For cups, you must weigh ingredients as cup weights vary by ingredient. For example: 1 cup flour = 125g, 1 cup sugar = 200g, 1 cup butter = 227g. UK kitchens should always use digital scales for baking accuracy.
What is the difference between oz and fl oz in recipes?
Oz (ounces) measures weight/mass, while fl oz (fluid ounces) measures volume. In the UK: 1 oz = 28.35g weight, 1 UK fl oz = 28.41ml volume. Note that US fl oz is different at 29.57ml. For dry ingredients like flour and sugar, always use weight measurements (oz/grams). For liquids, use fluid ounces or millilitres.
What is 4 oz in grams?
4 ounces equals 113.4 grams, typically rounded to 110g or 115g in UK cooking. 4 oz is equivalent to 1/4 pound and is exactly the size of one American stick of butter. This is a common measurement in American recipes for butter, margarine, and shortening.
What is 14 oz in grams (standard tin size)?
14 ounces equals 396.9 grams, typically rounded to 400g. This is the standard size of many UK tins including condensed milk, chopped tomatoes, and beans. Many American canned goods are also 14-15 oz, making this a very common conversion for recipe adaptation.
How many ounces in 100 grams?
100 grams equals 3.53 ounces. This is a very common metric measurement in UK recipes. For a rough conversion, think of 100g as approximately 3.5 oz. Conversely, 1 oz is about 28g, so 100g is slightly more than 3.5 oz.
Why should I weigh ingredients instead of using cups?
Cup measurements are inconsistent because different ingredients have different densities. 1 cup of flour weighs about 125g, but 1 cup of sugar weighs 200g. Even the same ingredient can vary based on how it's packed. Professional UK bakers always use scales because weighing is more accurate, leading to consistent results every time.
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Emma Harrison
Founder & Developer - UKCalculator.com

The UK Calculator team is the founder and developer of UKCalculator.com, providing free, accurate calculators for UK residents.