Calculators for packing, baking, and parties

BMI-for-age

CDC BMI-for-age percentile and weight category for children 2 to 20 years from sex, age, height, and weight.

Weight-for-age

WHO weight-for-age from birth to 24 months and CDC weight-for-age from 2 to 20 years.

Height-for-age

WHO recumbent length-for-age from birth to 24 months and CDC standing stature-for-age from 2 to 20 years.

Weight-for-length

WHO weight-for-recumbent-length percentile for infants, the usual US screen for wasting and overweight before age 2.

Head circumference

WHO head circumference-for-age percentile from birth to 24 months.

Juice by age

American Academy of Pediatrics daily limits for 100% fruit juice by age. Not a sugar or calorie calculator.

Lunchbox sugar

Add the grams of added sugar from snacks in a lunchbox and compare with the AHA child daily limit of 25 g (0 g under age 2).

Label sugar teaspoons

Turn the grams of sugar on a snack label into teaspoons for the amount actually eaten.

Cooking measurements

Convert teaspoons, tablespoons, cups, pints, quarts, gallons, milliliters, and liters for recipes.

Grams to cups

Convert grams to US cups for sugar, flour, butter, oats, rice, and other kitchen staples using USDA household densities.

Grams to teaspoons

Convert grams to teaspoons for sugar, salt, baking powder density foods, and other kitchen ingredients.

Grams to tablespoons

Convert grams to tablespoons using ingredient density and the US tablespoon (1/16 cup).

mL to grams

Convert milliliters to grams using the density of common kitchen ingredients.

Weight to volume

Convert pounds of a kitchen ingredient into US cups using USDA-style cup weights.

Butter weight

Convert US butter sticks, tablespoons, cups, and grams. One US stick is 113 g, 8 tablespoons, or 1/2 cup.

Oil to butter

Estimate how much oil replaces a given weight of butter in a bake.

Garlic cloves

Convert garlic cloves to minced teaspoons, garlic powder, and granulated garlic.

Fresh to dried herbs

Convert fresh herb volume to dried using the common 3-to-1 kitchen ratio.

Yeast types

Convert instant, active dry, and fresh yeast using standard volume ratios.

Dry to cooked pasta

Estimate cooked pasta yield from dry weight. Boiled wheat pasta is often about 2.2 times the dry weight.

Uncooked to cooked rice

Estimate cooked rice volume from dry cups for white, brown, and wild rice.

Rice to water

Water amounts for white, brown, jasmine, and sushi rice by the absorption method.

Cake pan size

Scale a batter between round, square, 9x13, loaf, and bundt pans using pan volume.

Baker's percentage

Compute hydration, salt, and yeast as a percent of flour weight.

Self-rising flour

Mix all-purpose flour, baking powder, and salt to stand in for self-rising flour.

Sourdough hydration

Dough hydration including starter flour and water.

Pancake scaler

Scale flour, milk, and eggs when you change pancake serving count.

Cake servings

Estimate party slices from common pan sizes and how many cakes you need.

Ice cream base

Philadelphia-style cream, milk, sugar, and salt for a quart of ice cream mix.

Cake cost

Sum flour, sugar, butter, and egg cost and divide by slices.

Coffee ratio

Dose coffee by weight from a brew ratio. This is brew math, not a daily caffeine limit.

Cold brew

Coffee to water for cold-brew concentrate or ready-to-drink steep.

Tea steep

Leaf amount, water temperature, and steep time for green, black, oolong, white, and herbal tea.

Pizza servings

How many pizzas to order from adult and kid headcount and pie size.

Popcorn

Popped cups and unpopped kernels for a movie night or class party.

Pizza size

Compare two pizzas by area and price per square inch.

Taco bar

Tortillas, protein, cheese, and salsa for a taco bar.

BBQ food

Meat, buns, and slaw amounts for a backyard cookout.

Grill size

Estimate cooking area and equivalent round-grill diameter from guest count.

Turkey weight

How large a turkey to buy, including a leftovers option, plus a fridge-thaw hint.

Turkey cook time

Estimate hours in a 325 °F oven. Always confirm 165 °F with a thermometer.

Turkey thaw

Refrigerator and cold-water thaw times from USDA turkey guidance.

Ham per person

Bone-in vs boneless ham purchase weight for a dinner.

Ham cook time

Oven time and USDA internal temperatures for fresh vs reheated ham.

Mashed potatoes

Raw potato, butter, and milk amounts for mashed potatoes.

Holiday meal

Combined turkey, potatoes, stuffing, cranberry, and rolls for a sit-down meal.

Pizza bake time

Starting bake windows for thin, New York style, pan, and frozen pizza.

Egg boil

Minutes after the water returns to a boil for soft, jammy, or hard eggs, with an altitude bump.

Steak temperature

Preference temperatures vs the USDA 145 °F minimum with a 3-minute rest.

Brine

Salt for a percent-by-weight water brine. This is not the HealthCalc sodium-in-salt nutrition converter.

Bacon cure

Starting salt, sugar, and Cure No. 1 amounts for a dry cure estimate. Follow USDA FSIS. Wrong nitrite is dangerous.