<script type="application/ld+json">{ “@context”: “https://schema.org”, “@type”: “FAQPage”, “mainEntity”: [ { “@type”: “Question”, “name”: “Does 1 cup of self-raising flour weigh the same as plain flour?”, “acceptedAnswer”: { “@type”: “Answer”, “text”: “No, self-raising flour is slightly lighter due to the added baking powder. While 1 cup of plain flour weighs about 4.8 oz, self-raising flour comes in at 4.5 oz per cup. Always check your recipe requirements, especially for air fryer baking where precision matters.” } }, { “@type”: “Question”, “name”: “Can I use plain flour instead of self-raising flour in air fryer recipes?”, “acceptedAnswer”: { “@type”: “Answer”, “text”: “You can substitute plain flour by adding 2 teaspoons of baking powder per 150g (about 1 cup) of flour. However, for best results in air fryer recipes, stick to self-raising flour when specified. The even distribution of leavening agents ensures consistent rise under rapid air circulation.” } }, { “@type”: “Question”, “name”: “Why does my air fryer cake sink after using self-raising flour?”, “acceptedAnswer”: { “@type”: “Answer”, “text”: “Sinking often occurs from underbaking or opening the air fryer too early. Ensure you’ve measured your 1 cup (4.5 oz) of flour accurately and cook until a skewer comes out clean. Overmixing can also deflate the batter – fold gently until just combined.” } }, { “@type”: “Question”, “name”: “How do I convert grams to ounces for self-raising flour?”, “acceptedAnswer”: { “@type”: “Answer”, “text”: “For self-raising flour, 125g equals approximately 4.5 oz (1 cup). Use this ratio to scale recipes up or down. Our <a href=https://www.airfryerrecipe.co.uk/air-fryer-conversion-chart>conversion chart includes both metric and imperial measurements for all common baking ingredients used in air fryers.” } } ] }
<script type="application/ld+json">{ “@context”: “https://schema.org”, “@type”: “WebPage”, “name”: “How many ounces is 1 cup of self-raising flour?”, “url”: “https://www.airfryerrecipe.co.uk/blog/how-many-ounces-is-1-cup-of-self-raising-flour”, “description”: “Learn how to convert 1 cup of self-raising flour to ounces with our simple guide. Perfect for air fryer baking and precise measurements every time.”, “inLanguage”: “en”, “datePublished”: “2025-08-12T23:23:28.664000+00:00”, “dateModified”: “2025-08-12T23:23:28.664000+00:00” }
<script type="application/ld+json">{ “@context”: “https://schema.org”, “@type”: “BreadcrumbList”, “name”: “Breadcrumbs”, “@id”: “https://www.airfryerrecipe.co.uk/blog/how-many-ounces-is-1-cup-of-self-raising-flour#breadcrumbs”, “itemListElement”: [ { “@type”: “ListItem”, “position”: 1, “name”: “Home”, “item”: { “@type”: “WebPage”, “@id”: “https://www.airfryerrecipe.co.uk” } }, { “@type”: “ListItem”, “position”: 2, “name”: “blogs”, “item”: { “@type”: “WebPage”, “@id”: “https://www.airfryerrecipe.co.uk/blog” } }, { “@type”: “ListItem”, “position”: 3, “name”: “How many ounces is 1 cup of self-raising flour?”, “item”: { “@type”: “WebPage”, “@id”: “https://www.airfryerrecipe.co.uk/blog/how-many-ounces-is-1-cup-of-self-raising-flour” } } ] }
<script type="application/ld+json">{ “@context”: “https://schema.org”, “@type”: “WebSite”, “url”: “https://www.airfryerrecipe.co.uk”, “name”: “Air Fryer Recipes”, “description”: “Explore crispy, healthy, and quick air fryer recipes from around the world. Perfect for everyday meals.”, “inLanguage”: “en” }
<script type="application/ld+json">{ “@context”: “https://schema.org”, “@type”: “Organization”, “name”: “Air Fryer Recipes”, “url”: “https://www.airfryerrecipe.co.uk”, “logo”: { “@type”: “ImageObject”, “url”: “https://www.airfryerrecipe.co.uk/brand” }, “areaServed”: [ { “@type”: “Country”, “name”: “United Kingdom” }, { “@type”: “Country”, “name”: “United States” } ], “contactPoint”: { “@type”: “ContactPoint”, “contactType”: “customer support”, “areaServed”: [ “GB”, “US” ], “availableLanguage”: [ “English” ], “email”: “support@airfryerrecipe.co.uk” } }
1 cup of self-raising flour equals approximately 4.5 ounces (or 4.41 oz to be precise). This measurement is essential for air fryer baking, where precision can make or break your recipe. Whether you're making cakes, scones, or even savoury dishes, knowing the exact weight ensures consistent results every time.
Why accurate flour measurements matter
Baking is a science, and even small deviations in flour weight can affect texture and rise. Self-raising flour contains baking powder, so incorrect measurements might leave your air fryer creations too dense or overly puffed. Using a kitchen scale for ounces ensures accuracy, especially when adapting recipes from our collection.
Many bakers swear by weighing ingredients rather than relying on cup measurements. A slight variance in how you scoop flour (scooped vs. spooned) can change the weight by up to 20%. For air fryer recipes, where heat distribution is intense, precision prevents undercooked centres or burnt edges.
Converting cups to ounces for UK bakers
In the UK, recipes often use grams, but ounces remain popular for smaller quantities. If your recipe calls for 1 cup of self-raising flour, you'll need 4.5 oz. This conversion is handy when using American recipes or scaling portions for smaller air fryer baskets.
For those who prefer grams, 1 cup equals roughly 125g. Our air fryer conversion chart covers all common baking measurements, making it easier to switch between units without guesswork.
Tools for measuring flour accurately
A digital kitchen scale is the most reliable tool for converting 1 cup of self-raising flour to ounces. If you don’t have one, use the spoon-and-level method: lightly spoon flour into the cup without packing it, then level off the excess with a knife. This avoids compacting the flour, which could add extra ounces unintentionally.
Common air fryer recipes using self-raising flour
Self-raising flour is a staple in quick breads and cakes perfect for air fryers. Try our air fryer cake recipes, where the right flour weight ensures a fluffy crumb. From vanilla sponge to chocolate muffins, precise ounces make all the difference.
Savoury options like air fryer onion bhajis or tempura also benefit from accurately measured self-raising flour. The leavening action helps create that coveted light, crispy texture without deep frying. Check our homepage for inspiration.
Adjusting recipes for different air fryer sizes
Smaller air fryers (3-5L) may require halving recipes, meaning you’ll need 2.25 oz (half a cup) of self-raising flour. Larger models can handle full batches, but always preheat for even baking. Remember, air fryers cook faster than conventional ovens, so keep an eye on timing.
Storing self-raising flour for best results
To maintain its raising power, store self-raising flour in an airtight container in a cool, dry place. Over time, moisture can deactivate the baking powder, leading to flat bakes. If your flour is older than 6 months, test it by mixing a spoonful with hot water – if it doesn’t bubble, it’s lost its lift.
For longer storage, freeze flour in sealed bags. Thaw completely before using, and fluff it up with a fork to redistribute the leavening agents. This ensures your 1 cup (4.5 oz) measurements remain effective for air fryer recipes.