Stop guessing at foreign recipes — the exact conversions for volume, weight and oven temperatures
10 min read · Oct 3, 2026 · By PagalHo Tools Team
Every cook has a story about the dish that failed for no apparent reason — the cake that came out like a brick, the sauce that never thickened, the bread that refused to rise. More often than not, the culprit was not technique but units: a cup misread as a different cup, grams guessed instead of weighed, or an oven temperature translated approximately instead of exactly.
The root of the problem is that recipes are written in local measurement dialects. American recipes speak in cups, tablespoons and Fahrenheit; European recipes speak in grams, millilitres and Celsius; British recipes mix both with cheerful inconsistency. A recipe that crosses any of those borders without conversion is a recipe with a hidden trap.
Volume versus weight is the deepest divide. A cup is a measure of space; a gram is a measure of mass. Converting between them requires knowing the density of the ingredient — and densities vary wildly, which is why “1 cup = X grams” tables always come with a column for the ingredient. There is no universal answer, only ingredient-by-ingredient ones.
This guide gives you the exact conversion factors, the ingredient tables that matter, the oven-temperature translations, and the classic mistakes to avoid. Keep it bookmarked next to your recipe collection — it will save more dishes than any single cooking tip.
Small volumes first, because they are the most standardised: 1 teaspoon = 5 ml and 1 tablespoon = 15 ml (three teaspoons). These hold across US, UK and metric recipes with one exception — the Australian tablespoon is 20 ml, so an Australian recipe’s “tablespoon” is a third larger. If a dish tastes over-salted and the recipe came from Sydney, now you know why.
The cup is where standardisation breaks down. The US customary cup is 236.6 ml (legally rounded to 240 ml for nutrition labelling), while the metric cup used in many Commonwealth countries is an even 250 ml. That is a 5–6% difference — negligible for a soup, potentially meaningful for baking, where ratios matter.
Fluid ounces add another layer: 1 US fluid ounce = 29.6 ml, and a US cup holds 8 of them. Note carefully that fluid ounces measure volume while plain ounces measure weight — eight fluid ounces of water weighs about eight ounces, but eight fluid ounces of honey weighs nearly twelve. The names match; the quantities do not.
For everyday cooking, the working set is small: 1 tsp = 5 ml, 1 tbsp = 15 ml, 1 cup ≈ 237 ml (US) or 250 ml (metric), 1 pint ≈ 473 ml, 1 quart ≈ 946 ml, 1 litre = 1000 ml. Memorise those six and you can translate almost any recipe’s liquid measurements on sight.
Which cup does your recipe mean?
Check the recipe’s origin: American sources mean the 237 ml US cup; Australian and many European sources mean the 250 ml metric cup. When in doubt for baking, weigh instead — grams do not have nationalities.
Weight conversions are refreshingly exact, because mass does not depend on the ingredient. The anchors: 1 ounce = 28.35 g, 1 pound = 453.6 g (16 ounces), and 1 kilogram = 2.205 lb. From these three, every kitchen weight conversion follows by multiplication or division.
In practice, cooks round aggressively: 100 g ≈ 3.5 oz, 250 g ≈ 9 oz (just over half a pound), 500 g ≈ 1.1 lb, and 1 kg ≈ 2.2 lb. These approximations are fine for shopping and portioning — nobody’s dinner was ever ruined by calling 500 g “a pound and a bit.”
Where exactness matters is baking ratios and anything scaled. Doubling a recipe that calls for “8 oz of flour” gives 16 oz, which is exactly a pound — but doubling “225 g” gives 450 g, and rounding that to “a pound” (454 g) introduces a small error that compounds across ingredients. For scaled baking, convert first, then multiply, then round once at the end.
A kitchen scale that toggles between grams and ounces is the single best purchase for anyone who cooks across measurement systems. It eliminates every weight conversion at a stroke — and it is more accurate than cup measures for dry ingredients anyway.
Here is the conversion that causes the most kitchen disasters: cups to grams for dry ingredients. Because a cup measures volume, the weight of “one cup” depends entirely on how densely the ingredient packs. One US cup of water weighs 237 g; one cup of honey weighs about 340 g; one cup of sifted flour weighs only about 120 g. Same cup, triple the range.
The most-used reference values (per US cup, spooned not packed): all-purpose flour ≈ 120–125 g, granulated sugar ≈ 200 g, brown sugar (packed) ≈ 220 g, butter ≈ 227 g, rolled oats ≈ 90 g, rice (uncooked) ≈ 185 g, honey ≈ 340 g, vegetable oil ≈ 218 g. Treat every one of these as approximate — the exact figure depends on brand, humidity and how you fill the cup.
That last point deserves emphasis: technique changes the number. Scooping flour directly with the cup compacts it and can add 20–30% more than spooning it in lightly and levelling off. This is why serious bakers abandoned cups decades ago — not out of snobbery, but because “one cup of flour” is not a reproducible quantity.
The practical rule: if a recipe gives weights, use weights. If it gives cups and you own a scale, convert using a reliable ingredient table and write the gram figures in the margin for next time. And if a recipe gives cups for something critical like flour in a delicate cake, consider finding a weight-based version of the same recipe instead.
Why America kept the cup
Volume measures dominated American home cooking because early settlers lacked affordable kitchen scales — cups and spoons were cheap and universal. Digital scales only became kitchen-cheap in the 2000s, which is why the cup-to-gram transition is still under way.
Ovens speak three languages: Celsius (most of the world), Fahrenheit (the US) and gas marks (older UK ovens). The translations every cook needs: 160 °C = 325 °F = gas mark 3; 180 °C = 350 °F = gas mark 4; 200 °C = 400 °F = gas mark 6; 220 °C = 425 °F = gas mark 7. The 180 °C / 350 °F / gas 4 trio alone covers a huge fraction of all baking.
Two quirks complicate the picture. First, fan-assisted (convection) ovens cook more efficiently, so recipes written for conventional ovens usually need the temperature reduced by about 20 °C — a separate adjustment from any scale conversion. Second, many ovens are inaccurate by 10–15 °C, which swamps any conversion rounding; an oven thermometer is a better investment than a conversion chart.
For the full formula: °F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9. But in the kitchen, memorised anchor pairs beat arithmetic — nobody wants to multiply by 1.8 with floury hands.
One more translation: the descriptive terms in old recipes. A “slow” oven is about 150 °C (300 °F), “moderate” is 180 °C (350 °F), “fairly hot” is 200 °C (400 °F) and “hot” is 220 °C (425 °F) and above. Vintage cookbooks assume you know this; now you do.
Halving and doubling are the most common recipe operations, and they are where unit discipline pays off. The safe method: convert everything to grams and millilitres first, do the multiplication, then round sensibly. “Half of 175 g” is an unambiguous 87–88 g; “half of three-quarters of a cup” is an invitation to error.
Eggs are the classic scaling problem — you cannot easily use half an egg, though beating one and using half the beaten egg works fine. Spices and leavening do not scale linearly either: double the paprika, but increase baking powder by only about one and a half times, or the cake may taste soapy. Salt, chilli heat and yeast all deserve a cautious hand when scaling up.
Cooking times do not scale with quantities. Doubling a cake recipe in a larger tin needs roughly the same temperature and a modestly longer time — not double the time. A doubled stew needs longer to come to the boil but a similar simmer. When in doubt, trust temperature probes and visual cues over the clock.
Write your scaled version down with its own ingredient list before you start cooking. Mid-recipe arithmetic with hot pans and timers running is where even careful cooks make their mistakes.
Mistake one: confusing fluid ounces with ounces. A recipe calling for “8 oz of chocolate” means 227 g of solid chocolate; “8 fl oz of milk” means 237 ml of liquid. Using a liquid measuring jug for flour, or a scale for milk when the recipe meant volume, introduces exactly the density errors this guide warns about.
Mistake two: packed versus sifted. “One cup of sifted flour” and “one cup of flour, sifted” are different quantities — the first is measured after sifting (lighter), the second before (heavier). Brown sugar is the mirror image: recipes usually mean firmly packed unless stated otherwise. When a recipe is ambiguous, weight is the tiebreaker.
Mistake three: the tablespoon trap across borders. As noted, an Australian tablespoon is 20 ml against the standard 15 ml — a 33% overdose on every spoonful. If a recipe’s seasoning seems wildly off and the source is Australian, check the spoons before blaming the recipe.
Mistake four: converting temperatures but forgetting the fan-oven offset, or converting the temperature while the recipe’s timings assumed a different oven type. Always convert the scale and check the oven type as two separate steps.
The fastest way to use this guide in a real kitchen is to convert the recipe once, before you start: rewrite the ingredient list in your own system’s units, adjust the oven setting, and note any scaling. Five minutes of conversion prevents forty minutes of regret.
For the fiddly cases — odd cup fractions, unfamiliar ingredients, or a recipe that mixes systems mid-list — PagalHo’s free unit converter handles length, weight, volume and temperature with exact factors. It is quicker than mental arithmetic and more reliable than memory.
Measurement systems are a historical accident, but dinner does not have to be. With the factors above, a scale on the counter, and a converter in your pocket, any recipe in the world is cookable — which, for anyone who loves food, is one of the finest freedoms there is.
It depends on the ingredient, because cups measure volume and grams measure weight. As rough guides per US cup: water 237 g, all-purpose flour 120–125 g, granulated sugar 200 g, butter 227 g, honey 340 g. For baking, always prefer a scale over cup conversions.
A US customary cup is 236.6 ml (often rounded to 240 ml), while the metric cup used in Australia and many other countries is exactly 250 ml — about 6% larger. Check your recipe’s origin when precision matters.
350 °F = 180 °C = gas mark 4. This is the most common baking temperature in Western recipes, so it is worth memorising as a trio.
No. Fluid ounces (fl oz) measure volume — 1 US fl oz = 29.6 ml — while ounces (oz) measure weight — 1 oz = 28.35 g. They only coincide for water-like liquids, where 1 fl oz weighs roughly 1 oz.
Convert to grams and millilitres first, then halve and round sensibly. For eggs, beat one egg and use half; for spices and baking powder, scale up cautiously rather than exactly doubling, as flavours and leavening don’t scale linearly.
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