Why can't I convert ml to g directly?

Volume and mass require an ingredient density (g / ml). Water is 1 ml = 1 g, but flour is ~125 g per US cup (240 ml) and sugar is ~200 g — wildly different. Rather than approximate via water, we keep them in separate categories.

What are the Japanese 小さじ / 大さじ / カップ values?

Under the JAS (Japanese Agricultural Standard): teaspoon (小さじ) = 5 ml, tablespoon (大さじ) = 15 ml, cup (カップ) = 200 ml. (The rice gō, 合, is a separate 180 ml unit.)

How do US tsp / tbsp / cup differ from the Japanese versions?

US tsp = 4.93 ml (≈ Japanese tsp 5 ml), US tbsp = 14.79 ml (≈ Japanese tbsp 15 ml), but US cup = 236.59 ml is ~18% bigger than the Japanese 200 ml cup. The cup difference is large enough that a US recipe measured with a Japanese cup will come out diluted.

A traditional Japanese volume unit, mainly used for rice. 1 gō ≈ 180 ml — the cup that ships with a Japanese rice cooker. Easy to confuse with the 200 ml general-purpose cup.

What's the difference between oz and fl oz?

In US recipes solids (meat, flour, cheese) use oz / lb (mass) while liquids use fl oz (volume). They are different physical quantities, despite both being called 'ounce'. This tool puts oz / lb under Weight and fl oz under Volume.

Is my input uploaded?

No. All computation runs in your browser and the value never leaves the page.

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Recipe Unit Converter (tsp / tbsp / cup ⇄ JP & US)

Convert recipe quantities between Japanese (tsp 5 ml, tbsp 15 ml, cup 200 ml, gō 180 ml) and US (tsp 4.93 ml, tbsp 14.79 ml, cup 236.59 ml, fl oz 29.57 ml) units side-by-side. Weight units (g, kg, oz, lb) sit in a separate Mode. Handy when cooking a US recipe with Japanese measuring tools — the JP cup is **~18% smaller** than the US cup, a gap big enough to spoil sauces and bakes. Volume and weight stay separate because the conversion depends on ingredient density (see FAQ). Runs entirely in your browser — no uploads.

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How to use

1) Pick a category (Volume / Weight). 2) Pick the input unit (Japanese tsp / tbsp / cup / gō / ml / L / US tsp / US tbsp / US cup / fl oz, or g / kg / oz / lb) and enter a value. 3) All other units within the same category appear instantly in the table. Each row has a Copy button. No run button — everything is live.

FAQ

Why can't I convert ml to g directly?: Volume and mass require an ingredient density (g / ml). Water is 1 ml = 1 g, but flour is ~125 g per US cup (240 ml) and sugar is ~200 g — wildly different. Rather than approximate via water, we keep them in separate categories.
What are the Japanese 小さじ / 大さじ / カップ values?: Under the JAS (Japanese Agricultural Standard): teaspoon (小さじ) = 5 ml, tablespoon (大さじ) = 15 ml, cup (カップ) = 200 ml. (The rice gō, 合, is a separate 180 ml unit.)
How do US tsp / tbsp / cup differ from the Japanese versions?: US tsp = 4.93 ml (≈ Japanese tsp 5 ml), US tbsp = 14.79 ml (≈ Japanese tbsp 15 ml), but US cup = 236.59 ml is ~18% bigger than the Japanese 200 ml cup. The cup difference is large enough that a US recipe measured with a Japanese cup will come out diluted.
What is 合 (gō)?: A traditional Japanese volume unit, mainly used for rice. 1 gō ≈ 180 ml — the cup that ships with a Japanese rice cooker. Easy to confuse with the 200 ml general-purpose cup.
What's the difference between oz and fl oz?: In US recipes solids (meat, flour, cheese) use oz / lb (mass) while liquids use fl oz (volume). They are different physical quantities, despite both being called 'ounce'. This tool puts oz / lb under Weight and fl oz under Volume.
Is my input uploaded?: No. All computation runs in your browser and the value never leaves the page.

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