Kitchen Math Made Simple
18+ free calculators for home cooks. Scale recipes, calculate yeast and dough hydration, plan holiday meals, and convert measurements. No sign-up. No clutter. Just answers.
Our Free Kitchen Calculators
Recipe Servings Calculator
Scale any recipe up or down in seconds. Enter your ingredients, original servings, and target servings. We handle the fractions.
Air Fryer Converter
Convert any oven recipe to air fryer instantly. Temperature and time adjustments for basket, oven-style, small, and large air fryers.
Coffee Ratio Calculator
Perfect coffee every time. Calculate coffee-to-water ratios for pour over, French press, espresso, drip, cold brew, and more.
Holiday Meal Planner
Plan the perfect holiday meal or party. Thanksgiving, Christmas, Easter, Super Bowl, 4th of July BBQ — get exact food amounts for any guest count.
Kitchen Measurement Converter
Convert cups to grams, tablespoons to milliliters, ounces to cups. Includes ingredient-specific density for flour, sugar, butter, and more.
Sourdough Calculator
Calculate sourdough starter feeding ratios, bread dough formulas, and hydration percentages. Baker's math made simple.
Yeast Calculator
Calculate exact yeast amounts for bread, pizza, and more. Convert between active dry, instant, rapid-rise, and fresh yeast with baker's percentages.
Dough Hydration Calculator
Calculate dough hydration percentage for bread, pizza, and sourdough. Or work backwards to hit your target hydration ratio perfectly.
Brine Calculator
Perfect brine every time. Calculate exact salt, sugar, and water amounts for turkey, chicken, pork chops, and more. Adjustable strength.
Sugar & Salt Concentration
Calculate sugar percentage, salt content, and Brix for syrups, brines, jams, and fermentations. Perfect for homebrewing and candy making.
Food Safety Temperature Guide
USDA safe internal temperatures for every food. Beef, pork, chicken, turkey, seafood — plus doneness guide and danger zone info.
Recipe Cost Calculator
Calculate total cost and per-serving cost of any recipe. Perfect for meal planning, home bakers, and small food businesses.
Cooking Time Calculator
Adjust cooking times for altitude, different cooking methods, meat doneness, and weight. Works with Fahrenheit and pounds.
Baking Pan Size Converter
Convert recipes between different pan sizes and shapes. Round to square, 8-inch to 9-inch — get the exact ingredient multiplier.
Oven Temperature Converter
Convert between Fahrenheit, Celsius, and gas marks instantly. Includes a cooking temperature guide for roasting, baking, and broiling.
Ingredient Substitution Finder
Missing an ingredient? Find tested substitutes for buttermilk, eggs, flour, brown sugar, butter, and dozens of other pantry staples.
BAC Calculator
Estimate your Blood Alcohol Content based on drinks, weight, and time. Educational tool for understanding alcohol metabolism.
Printable Conversion Chart
Free printable kitchen conversion charts. Cups to grams, volume equivalents, oven temps, pan sizes, butter, eggs — print and stick on your fridge.
Why The Kitchen Calc?
Mobile-Friendly
Designed for your phone. Use it right in the kitchen — big buttons, easy scrolling, no zooming required.
US-Centric
Built for American home cooks. Fahrenheit, pounds, cups, tablespoons — the units you actually use.
No Sign-Up
Just open the page and start calculating. We don't collect your email, and we never will.
From the Blog
Cooking Tips & How-To Guides
Practical kitchen advice, recipe scaling tips, and cooking math made simple.
How to Adjust a Recipe for a Different Pan Size (Step-by-Step Guide)
Learn how to adjust a recipe for a different pan size using simple area and volume math — plus a pan conversion chart, time and temperature fixes.
How to Convert Recipe Measurements When Doubling (Step-by-Step Guide)
Learn how to convert recipe measurements when doubling — cups to tablespoons, odd fractions to grams, plus a full doubling chart and egg workarounds.
Scaling a Recipe From 4 to 6 Servings: The 1.5x Method
Scaling a recipe from 4 to 6 servings sounds easy until you hit 1.5 eggs. Here's the exact 1.5x math, a conversion table, and what not to multiply.
Frequently Asked Questions
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