How to use the tools

Paste your ingredients

One ingredient per line, quantity first. "1 1/2 cups flour" and "3 to 4 eggs" both parse correctly, including the range.

Pick a scaling mode

Choose "By multiplier" and enter a number (2 to double, 0.5 to halve), or choose "By servings" and enter your original and desired servings.

Read the scaled list

Every quantity updates, rounded to a fraction you can measure with, such as eighths and thirds, instead of a decimal like 1.583.

Save or share it

Use the shareable link to bookmark the conversion or send it to someone else. Nothing is stored on a server.

Choose your ingredient

Pick from the ingredient list so the converter uses that ingredient's real density instead of a flat multiplier.

Enter the amount and unit

Type the quantity and select cups, tablespoons, teaspoons, grams, kilograms, ounces, or pounds.

Pick the unit to convert to

Select the target unit. The result updates immediately based on that ingredient's density.

Swap direction if needed

Use the swap button to flip which unit is the source and which is the target.

Enter a temperature

Type a value into any one field: Fahrenheit, Celsius, or gas mark.

Read the other two

The remaining fields update automatically. Gas mark uses the standardized UK table, so gas mark 4 shows as 180°C.

Check the fan adjustment

If your oven is fan-assisted, use the fan/convection figure, which is 20°C or 25°F lower than the conventional setting shown.

Add each ingredient

Use "Add ingredient" and pick from the list for every ingredient in your recipe, rather than typing free text.

Enter the amount and unit

Type the quantity you actually used and pick its unit: cups, grams, ounces, or another supported unit.

Set your servings

Enter how many servings the recipe makes. The calculator divides the recipe total to show calories and macros per serving.

Check the full breakdown

Open "Full recipe totals and per-ingredient breakdown" to see exactly which ingredient contributes what, for the whole recipe.

Calibrate your screen

Click the gear icon in the header and choose Auto-detect, Diagonal, or Card. Card, matching a real card to an on-screen box, is the most accurate.

Save the calibration

Click Save. It's stored on this device, so you only need to do this once per screen.

Compare a real pan

Open the pan size guide and hold your actual pan up to the on-screen circles to see which size it matches.