🍞 酵母换算计算器Yeast Conversion Calculator
在干酵母（活性干酵母）、即发干酵母和鲜酵母之间换算用量，支持克、盎司、茶匙、标准包（7 克）和 2 盎司鲜酵母块；按 Red Star 酵母的换算：干酵母与即发酵母 1:1，鲜酵母约为干酵母的 2.7 倍重。Convert amounts between active dry, instant and fresh (cake) yeast in grams, ounces, teaspoons, standard 7 g packets or 2 oz fresh cakes — using Red Star Yeast's figures: active dry and instant swap 1:1, and fresh yeast is about 2.7 times the weight of dry.
使用说明与常见问题How-to & FAQ
「酵母换算计算器」是什么？What is the Yeast Conversion Calculator tool?
在干酵母（活性干酵母）、即发干酵母和鲜酵母之间换算用量，支持克、盎司、茶匙、标准包（7 克）和 2 盎司鲜酵母块；按 Red Star 酵母的换算：干酵母与即发酵母 1:1，鲜酵母约为干酵母的 2.7 倍重。Convert amounts between active dry, instant and fresh (cake) yeast in grams, ounces, teaspoons, standard 7 g packets or 2 oz fresh cakes — using Red Star Yeast's figures: active dry and instant swap 1:1, and fresh yeast is about 2.7 times the weight of dry.
如何使用「酵母换算计算器」？How do I use the Yeast Conversion Calculator tool?
在「酵母换算计算器」中，填写「用量」、「单位」、「原酵母类型」等参数，结果会随输入实时计算并显示在下方。In the Yeast Conversion Calculator: Fill in "Amount", "Unit", "Yeast you have"; results are recalculated instantly as you type.
干酵母和即发酵母能直接替换吗？Can active dry and instant yeast be swapped?
可以，按 1:1 等量替换（Red Star 和 King Arthur 都这样建议）。即发酵母发得稍快，用活性干酵母时注意观察面团、适当延长发酵时间。常见的「即发酵母少用 25%」说法并没有被这两家采用。Yes, one for one (both Red Star and King Arthur say so). Instant yeast may rise a little faster, so with active dry just watch the dough and allow more time. The common 'use 25% less instant' rule isn't what either of them recommends.
鲜酵母和干酵母怎么换算？How do fresh and dry yeast convert?
Red Star 的数据：一块 2 盎司（约 56.7 克）鲜酵母 = 3 包干酵母（21 克）；每 1/3 块约 18.9 克 = 1 包 7 克干酵母，所以鲜酵母约是干酵母重量的 2.7 倍。Red Star's figures: one 2 oz (about 56.7 g) fresh cake = 3 packets (21 g) of dry yeast, and each third, about 18.9 g, equals one 7 g packet — so fresh yeast is about 2.7 times the weight of dry.
配方里糖很多怎么办？What if the recipe is very sweet?
Red Star 建议：每 4 杯面粉中糖超过 1/2 杯时，整个配方多加 1 包干酵母，因为大量糖会减慢发酵。面粉估算按 1 杯约 120 克计。Red Star suggests adding one extra packet of dry yeast to the recipe when there's more than ½ cup of sugar per 4 cups of flour, since a lot of sugar slows fermentation. Flour estimates assume about 120 g per cup.
换算系数准确吗？Are the conversion factors exact?
「酵母换算计算器」采用国际单位制（SI）或公认标准中的定义值作为换算系数，结果保留约 10 位有效数字。The Yeast Conversion Calculator uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「酵母换算计算器」免费吗？需要注册吗？Is the Yeast Conversion Calculator free? Do I need an account?
「酵母换算计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Yeast Conversion Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.