Why does 2+2×3 give 8 and not 12?

Calcnest follows the standard order of operations: multiplication and division are done before addition and subtraction. So 2 + 2 × 3 is 2 + 6 = 8. Simple calculators that work strictly left to right show 12 instead.

How does percent work? Is 50+10% equal to 55?

Yes. The percent key works like a desk calculator: 50 + 10% adds 10% of 50 to get 55, 50 − 10% gives 45, and 50 × 10% gives 5 (10% of 50). For "X is what % of Y" or percent change, use the Percent tool.

Can I convert cups to grams?

Yes. In the unit converter's cooking section, pick water, milk, flour, sugar, butter or rice and convert cups, tablespoons or teaspoons to grams. The ingredient matters: 1 US cup of flour is about 125 g, while 1 cup of sugar is about 200 g.

Is my calculation history limited?

No. Every calculator and tool result is saved automatically with no limit. You can pin important entries, add notes, tap to reuse a result, swipe to delete (with undo) and share an entry as text.

Does it work offline?

Yes. All calculations and unit conversions run on your phone, so it works without internet. There is no currency converter.

How do I add the widget or the Quick Settings tile?

Long-press an empty spot on your home screen, tap Widgets and drag Calcnest onto the screen; it shows your last result, the calculator and 2 favorite tools. For the tile, pull down Quick Settings, tap the edit (pencil) button and drag the Calcnest tile into place.

Do I need an account? Where is my data stored?

No account or sign-up is needed. Your history and settings stay on your phone. The app is supported by ads, and ad sound is muted.

Can I change decimal places or turn off key vibration?

Yes. In settings you can choose decimal places and a thousands separator, turn key vibration on or off, and switch between light and dark theme.

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Cups to grams for baking: why every ingredient is different

A cup measures volume and a gram measures weight, so how many grams are in a cup depends on the ingredient's density. Using one US cup (236.59 ml): water is about 237 g, all-purpose flour about 125 g, granulated sugar about 200 g, butter about 227 g and uncooked rice about 185 g. The formula is grams = volume in ml × density in g/ml.

Why one cup weighs differently

A cup of flour has lots of air between the particles, so it's light. Sugar and butter pack tightly, so the same cup is much heavier. That's why no single "1 cup = X grams" number works for every ingredient. The table below uses densities of 1.0 (water), 0.53 (flour), 0.85 (sugar), 0.96 (butter) and 0.78 (rice) g/ml.

Ingredient	1 cup (236.59 ml)	1 tbsp (14.79 ml)	1 tsp (4.93 ml)
Water	≈ 237 g	≈ 14.8 g	≈ 4.9 g
Flour	≈ 125 g	≈ 7.8 g	≈ 2.6 g
Sugar	≈ 200 g	≈ 12.6 g	≈ 4.2 g
Butter	≈ 227 g	≈ 14.2 g	≈ 4.7 g
Rice	≈ 185 g	≈ 11.5 g	≈ 3.8 g

How to convert it yourself

If you know the density, you can convert any amount.

Cups → ml: cups × 236.59. Example: ½ cup = 118.3 ml
ml → grams: ml × density. Example: flour 118.3 ml × 0.53 ≈ 63 g
Grams → cups: grams ÷ density ÷ 236.59. Example: 250 g flour ÷ 0.53 ÷ 236.59 ≈ 2 cups

Tips for accurate baking

Flour weight varies with how you fill the cup: sifted flour weighs less, packed flour weighs more. If a recipe gives grams, weighing on a kitchen scale is the most reliable option.

Check which cup the recipe uses. These numbers are for the US cup (236.59 ml); a 200 ml cup, common in Korean recipes, holds about 15% less, so a cup of flour is closer to 106 g.

How Calcnest converts it

In Calcnest's unit converter, the cooking section lets you pick water, milk, flour, sugar, butter or rice and convert cups, tablespoons and teaspoons to grams and back. Length, weight, volume, temperature, area, speed and data conversions are in the same place, every result is saved to history, and it all works offline.

Convert recipe units by ingredient

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