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Home Free kitchen calculators and food science tools — no signup needed About Suzanne The registered dietitian behind Frugal Organic Mama since 2013 Contact Get in touch with questions or feedback Shop — Frugal Kitchen Toolkit Recommended kitchen tools that pay for themselves Kitchen Calculators All 15 free precision cooking calculators in one place Kitchen Wisdom Blog Food science and cooking guides organized by topic Search Search all calculators, guides, and articles Privacy Policy How your data is handled and affiliate disclosure Terms & Disclaimer Terms of service and medical disclaimer Sitemap Complete site index (you are here) RSS Feed Subscribe to new articles via RSS
Calculators
Baking Substitutions Calculator (Instant Ingredient Swaps & Exact Ratios) Out of buttermilk, eggs, or butter? Get exact baking substitutions with ratios tailored to your recipe — pancakes need a different fix than cakes. Instant, no signup. Cake Pan Size Converter | Baking Time & Batter Calculator Convert any cake pan size instantly. Get exact batter adjustments and baking time for round, square, rectangle, and loaf pans — any combination. Canning Jar Calculator | How Many Mason Jars Do I Need? Calculate exactly how many quart or pint jars you need for your harvest. Covers tomatoes, cucumbers, green beans, and peppers — based on USDA yield standards. Includes bushel-to-jar conversion chart and canning yield guide for home gardeners. Coffee Ratio Calculator | SCAA Golden Cup Standard Calculate exact coffee to water ratios for pour over, French press, drip, and cold brew. Based on SCAA Golden Cup Standard — brew better than Starbucks for $0.50 a cup. Cooking Energy Cost Calculator | Oven vs Air Fryer vs Instant Pot Compare real electricity costs for oven, air fryer, Instant Pot, microwave, and slow cooker. Enter your kWh rate to see exact savings for your kitchen. Cups to Grams Calculator — Free Kitchen Conversion Tool | Frugal Organic Mama Convert cups to grams for flour, sugar, butter and 55+ ingredients instantly — no signup, no ads. Based on USDA and King Arthur tested measurements. Microwave Defrost Calculator | Safe Thawing Times by Wattage Calculate safe defrost times for your exact microwave wattage — 700W to 1200W. Covers chicken, beef, fish, and pork. Based on USDA food safety guidelines. Pickle Brine Calculator | Exact Salt Ratio for Fermentation Calculate precise brine salinity (2–5%) for crisp fermented pickles and vegetables. Auto-converts between Morton, Diamond Crystal, and sea salt by weight. Raised Bed Soil Calculator | Cubic Feet & Hugelkultur Savings Calculate exact soil volume for any raised bed size in cubic feet or yards. See how cardboard and wood fillers reduce soil cost — plus Mel's Mix ingredient breakdown for organic beds. Rice Water Ratio Calculator | Perfect Rice Every Time Get exact rice-to-water ratios for basmati, jasmine, sushi, brown rice and more — adjusted by cooking method. Stovetop, rice cooker, and Instant Pot. No signup. Sourdough Hydration Calculator | Baker's Percentage Tool Calculate exact sourdough hydration percentages including your starter weight. Get baker's percentages instantly — fix flat, sticky, or dense dough before you bake. Taco Bar Calculator | How Much Food for 20 to 100 People Calculate exact taco meat, tortillas, cheese, and toppings for any crowd. Cooking loss already factored in. Includes nacho bar mode and kids vs adults adjustment. and leftover freezing tips. Turkey Defrost & Roast Planner | Serve-Time Thanksgiving Calculator Tell us your target serve time and turkey weight — the planner reverse-calculates when to move it to the fridge, when to start roasting, and a cold-water backup window. USDA safe. Vegetable Blanching Timer | USDA Chart for Freezing Get exact blanching times for broccoli, green beans, carrots, corn, and more. Includes ice bath alerts. Prevent mushy frozen vegetables with USDA-standard timing. Vinegar Cleaning Calculator | Exact Dilution Ratios Mix vinegar cleaning solutions at the right concentration for windows, mold, hard water stains, and all-purpose use. Get precise measurements for any spray bottle size.
Blog Topics
Articles
How to Blanch Mushrooms: Steam-Only Guide for Freezing 2026-06-26
How to Blanch Broccoli: Perfect Florets & Stems Every Time 2026-06-26
How to Cold Water Defrost Chicken: Timing Chart & Step-by-Step Guide 2026-06-23
Cake Pan Size Conversion: Complete Reference Chart for Round, Square, Rectangular & Loaf Pans 2026-06-23
Raised Bed Soil Mix Ratio: 3 Proven Recipes by Volume 2026-06-17
5 Kitchen Mistakes Costing You $500+ Per Year — And Exactly How to Stop 2026-06-17
Can You Defrost Chicken in the Microwave? USDA Says Yes 2026-06-17
How Long to Defrost Chicken in the Fridge: Hour-per-Pound Chart 2026-06-17
Your Honey Cake Collapsed: Why Measuring Sticky Ingredients by Volume Destroys Your Baked Goods 2026-06-17
Smelly Dishwasher? How to Clean It with Vinegar (3 Failure Scenarios & Fixes) 2026-06-17
Kitchen Appliance Energy Cost: Which Is Cheapest to Run? 2026-06-16
10 Beginner Canning Mistakes & USDA-Approved Fixes 2026-06-16
AeroPress Coffee Ratio: 1:13, 1:15, or 1:17 — Standard vs Inverted Method 2026-06-11
Bulk Fermentation Temperature Chart: Time Ranges at Every Kitchen Temperature 2026-06-10
How to Measure Butter Without a Scale: The Wrapper Method, Water Displacement, and When Each Works 2026-06-02
Tablespoon to Cup Conversion: The Kitchen Math That Goes Wrong When You Double a Recipe 2026-06-01
Oven Temperature Conversion: Fahrenheit, Celsius, Fan, and Gas Mark — The Complete Reference 2026-05-31
How to Can Green Beans: Pressure Canning Method, Times, and the Safety Rules That Cannot Be Skipped 2026-05-29
How to Make Kimchi at Home: The Complete Guide with Traditional Ratios 2026-05-28
Gas vs Electric vs Induction Cooking: Real Energy Costs, Real Performance, and How to Choose 2026-05-27
Freezing vs Canning vs Dehydrating: Which Food Preservation Method Is Right for Your Harvest 2026-05-26
Brown Rice vs White Rice: Nutrition, Arsenic, and When White Is Actually the Better Choice 2026-05-26
Cold Proofing vs Room Temperature Proofing: What the Temperature Does to Your Sourdough 2026-05-25
Vinegar vs Baking Soda vs Hydrogen Peroxide: Which Natural Cleaner for Which Job 2026-05-24
Compost vs Fertilizer vs Topsoil: What Your Raised Bed Actually Needs and When 2026-05-23
Sauerkraut vs Kimchi vs Curtido: Three Fermented Cabbage Traditions, One Science 2026-05-22
All-Purpose vs Bread vs Cake Flour: The Protein Difference That Changes Everything You Bake 2026-05-21
Butter vs Oil in Baking: When Each One Wins and Why the Recipe Knows Something You Don't 2026-05-20
Coffee Brewing Methods Compared: Which Is Best for You 2026-05-19
How to Build a Raised Garden Bed: Step-by-Step with Real Material Costs 2026-05-17
How to Blanch Leafy Greens: Spinach, Kale, and Swiss Chard Times and Technique 2026-05-17
Basmati Rice Water Ratio: Why Less Water Produces Better Results 2026-05-14
Power Outage Food Safety: How Long Does a Freezer Stay Cold? 2026-05-12
Can You Freeze Tomatoes Without Blanching? Yes — Here's the Method and the Trade-Off 2026-05-09
Kahm Yeast vs Mold on Fermented Vegetables: How to Tell the Difference and What to Do 2026-05-06
How to Store Sourdough Bread: Why the Fridge Is the Wrong Answer 2026-05-04
How Long Does Cooked Rice Last? The Food Safety Answer (And Why Rice Is Riskier Than Most Leftovers) 2026-05-03
How to Blanch Corn: Times, Ice Bath, and the Freezing Method That Actually Works 2026-05-02
Sourdough Scoring: Why It's Not Just Decorative (And How to Actually Do It) 2026-05-01
Turkey Brine: Dry Brine vs Wet Brine — Which Actually Makes a Better Bird 2026-04-30
How Much Turkey Per Person: The Formula That Actually Accounts for Bones, Leftovers, and Hungry Families 2026-04-30
How Long Does Sourdough Starter Last? Fed, Unfed, Refrigerated, and Frozen 2026-04-29
How Long Do Spices Last? The Honest Shelf Life Guide (With the Test That Actually Works) 2026-04-29
Pour Over Coffee Ratio: The Numbers, the Bloom, and Why Your First Cup Never Tastes Right 2026-04-26
Jasmine Rice Water Ratio: Why 1:1.25 Works Better Than the Package Says 2026-04-26
How Much Meat Per Person: A Party Planner's Guide to Every Cut and Event Type 2026-04-26
How Long Do Pickles Last? Refrigerator, Canned, and Fermented — With Food Safety Guidelines 2026-04-26
Baking Soda vs Baking Powder: Why They're Not Interchangeable (And What Happens When You Mix Them Up) 2026-04-26
Why 1 Cup of Flour Weighs Less Than 1 Cup of Sugar (And Why It Matters for Baking) 2026-04-25
Starter Percentage vs Bulk Fermentation Time: The Relationship I Wish I Learned Earlier 2026-04-22
Rice Cooker Water Lines vs Measuring Cups: Why the Numbers Don't Match 2026-04-22
How Much Does It Cost to Fill a Raised Bed? The Math I Actually Use Before Buying Soil 2026-04-22
How Long to Defrost Chicken Breast, Thighs, and Whole Chicken 2026-04-22
How to Make a Sourdough Starter from Scratch: Day-by-Day Guide with Honest Failure Points 2026-04-19
How to Roast a Turkey: Times, Temperatures, and What Actually Goes Wrong 2026-04-18
How to Can Tomatoes at Home: Water Bath Method, Safety Rules, and the Acid Step You Can't Skip 2026-04-17
Water Bath Canning vs Pressure Canning: Which Do You Actually Need? 2026-04-03
Hugelkultur Raised Beds: How to Build One and Cut Soil Costs by 40% 2026-04-03
Home Brew vs Starbucks: What Your Coffee Habit Actually Costs Per Year 2026-04-03
Why Coffee Tastes Bitter or Sour: The Extraction Science Behind Every Bad Cup 2026-04-02
What to Do With Overproofed Sourdough: Rescue Methods and When to Start Over 2026-04-02
Cold Brew Coffee Ratio: Concentrate vs Ready-to-Drink (With Exact Measurements) 2026-04-02
Sauerkraut Troubleshooting: Every Problem Fixed (No Bubbles, Mold, Slimy Brine) 2026-03-31
Brown Rice Water Ratio: Why It's Different and How to Get It Right Every Time 2026-03-31
Vinegar in Laundry: How Much to Use, What It Does, and What to Avoid 2026-03-30
How to Freeze Garden Vegetables: Blanching Times & Storage Guide for 25 Crops 2026-03-30
Buttermilk Substitute: 5 Options That Actually Work in Recipes 2026-03-30
French Press Coffee Ratio: 1:14, 1:15, or 1:17 — Which Is Right for You 2026-03-29
Best Egg Substitutes for Baking: What to Use for Cookies, Cakes, and Bread 2026-03-29
Cleaning Vinegar vs White Vinegar: Differences, Uses, and Which to Buy 2026-03-29
How to Blanch Green Beans: Time Chart, Ice Bath & Freezing Guide 2026-03-29
Raised Bed Depth Guide: How Deep Does Your Soil Really Need to Be? 2026-03-27
How to Compost at Home: The Beginner's Guide to Free Garden Soil 2026-03-27
Best Soil Mix for Raised Beds: Mel's Mix, Budget Alternatives & What Actually Works 2026-03-27
Why Rice Sticks to the Pot (And How to Fix It Every Time) 2026-03-26
Rice Cooking Methods Compared: Rice Cooker vs Stovetop vs Instant Pot vs Microwave 2026-03-26
Proofing Basket vs Loaf Pan: Which Is Better for Sourdough Bread? 2026-03-26
How to Reheat Rice So It Stays Fluffy: Best Methods + Safety Tips 2026-03-26
How to Make Sauerkraut at Home: 2% Salt Ratio, 5-28 Day Timeline & Troubleshooting 2026-03-26
Fermentation Temperature Guide: How to Control Flavor, Texture & Safety 2026-03-26
Does Preheating Your Oven Use More Energy? The Truth, Costs & When to Skip It 2026-03-26
Sourdough Bulk Fermentation: Temperature Guide & Time Chart 2026-03-26
Best Way to Defrost Meat: Safe Methods, Timing Chart & What NOT to Do 2026-03-26
Air Fryer vs Oven vs Microwave: Which Really Costs Less to Run? 2026-03-26
Sourdough Poke Test: The Only Proofing Guide You Need 2026-03-25
How Long to Cook Rice in a Rice Cooker (All Rice Types + Timing Chart) 2026-03-25
How to Defrost Ground Beef in Microwave (Without Cooking the Edges) 2026-03-25
Aroma Rice Cooker Instructions: Water Ratios, Settings & the Cup Mystery 2026-03-25
What to Plant in Raised Beds Your First Year: A Beginner's Guide to High-Yield Choices 2026-03-23
Vinegar and Baking Soda for Cleaning: What Works, What Doesn't, What to Never Mix 2026-03-23
When Is Sourdough Starter Ready to Use? The Float Test and 5 Better Signs 2026-03-23
How Long to Thaw a Turkey in the Fridge: Exact Times by Weight 2026-03-23
USDA Canning Guidelines Explained: What They Mean and Why They Exist 2026-03-22
Instant Pot Rice Water Ratio: The Exact Guide for Every Rice Type 2026-03-22
Coffee to Water Ratio: The Complete Guide to the Golden Cup Standard 2026-03-22
Baking on a Budget: 19 Pantry Swaps for Buttermilk, Cake Flour, Eggs, and More 2026-03-22
What Is Headspace in Canning? Why the Gap at the Top of Your Jar Matters 2026-03-19
Taco Bar Shopping List: Exactly What to Buy for Any Crowd Size 2026-03-19
What to Do With Leftover Taco Meat: 7 Easy Meals 2026-03-19
How Pan Size Affects Baking Time: The Heat Distribution Science 2026-03-19
How Much Food for a Taco Bar? The Math Behind Feeding a Crowd 2026-03-19
8x8 vs 9x13 Pan: How to Convert Any Baking Recipe 2026-03-19
Can You Use a Gas Stove During a Power Outage? Safety and Risks 2026-01-28
2026 Home Energy Tax Credits: Up to $3,200 - Which Upgrades Qualify and How to Claim 2026-01-27
Microwave vs Oven Baked Potato: Taste, Nutrition, and Energy Cost 2026-01-26
Best Non-Toxic Ceramic Air Fryers (2026): What PTFE-Free Actually Means 2026-01-25
The Master Rice Ratio Chart: Stovetop, Pressure Cooker & Steam 2026-01-23
Why Your Pickles Failed: The Science of Salt Density & Weight 2026-01-23
Food Safety 101: The Danger Zone Explained (40°F - 140°F) 2026-01-23
Baker’s Math Explained: How to Design Your Own Sourdough Recipes 2026-01-23
Should You Wash or Soak Rice? When It Helps, When It Hurts 2026-01-22
Seeraga Samba Rice Water Ratio Explained: Why This Aromatic Rice Fails So Often 2026-01-21
Does Rice Age Matter? Why Old Rice Needs More Water (and New Rice Doesn't) 2026-01-21
Why Rice Turns Mushy, Gummy, or Gluey (The Starch Science) 2026-01-20
Why Blanching Prevents Freezer Burn (And Why Skipping It Ruins Your Veggies) 2026-01-20
The Science of Vinegar Cleaning Ratios: Why Dilution Matters More Than 'Stronger Is Better' 2026-01-20
Rice Water Ratio Chart - Perfect Ratios for All Rice Types (2026 Guide) 2026-01-20
Hydration vs Flour Type: What Actually Creates Open Crumb (And Why Most Advice Is Wrong) 2026-01-20
Blanching vs. Steaming for Freezing Vegetables: Which Method Actually Works? 2026-01-20
Basmati vs Jasmine vs Short-Grain: Why Water Ratios Are Never the Same 2026-01-20
How to Sanitize Wooden Cutting Boards Naturally (Without Ruining Them) 2026-01-19
The Cow’s Milk Confusion: Raw, Pasteurized, Grass-Fed — What Actually Matters 2026-01-19
The Cost of Canning: Is Growing Your Own Food Actually Cheaper? 2026-01-19
How to Blanch Vegetables: Time Chart for Every Common Vegetable (USDA Guide) 2026-01-18
Stop Buying Dirt: How to Fill Raised Beds for Half the Price (Without Killing Your Plants) 2026-01-17
Why Are My Pickles Mushy? The 3 Main Culprits 2026-01-11
Lacto-Fermentation vs. Vinegar Pickling: Fermented Pickles and Quick Pickles Are Not the Same 2026-01-11
Countertop vs. Fridge vs. Water vs. Microwave: The Ultimate Thawing Showdown 2026-01-11
Why Rice Turns Mushy: The Starch Science Behind Wet, Gummy, Overwatered Rice 2026-01-10
Hard Water Stains? Why Vinegar Is Better Than Bleach 2026-01-10
DIY Vinegar Cleaner Cost: How Much Homemade Spray Saves vs Store-Bought 2026-01-10
Troubleshooting Sourdough: Why Is My Loaf Flat and Dense? 2026-01-09
Sourdough Discard 101: Stop Throwing Money in the Trash 2026-01-09
The Science of Open Crumb: Why Hydration Is Key 2026-01-09
Zucchini Overload? How to Freeze, Pickle, and Preserve Every Last One 2025-08-15