Cooking Calculators & Kitchen Tools — Recipe Conversion, Cooking Times & Ratios

Cooking is equal parts art and science. Our kitchen tools handle the science: recipe scaling, cooking time estimation, baker's percentages, coffee ratios, calorie calculation, and ingredient substitutions. Whether you're doubling a cake recipe for a party, converting a family recipe from metric, timing the perfect roast, or figuring out substitutions for missing ingredients, these calculators eliminate the mental math and reduce kitchen disasters. Perfect for home cooks, bakers, meal preppers, and anyone who's ever panicked mid-recipe because they're out of eggs.

Key Concepts

• 🍞 Baker's Percentages: All ingredients expressed relative to flour weight (flour = 100%). A dough with 70% hydration behaves the same whether making 500g or 50kg. The professional baker's scaling system.
• ☕ Coffee Brewing Ratios: SCA Golden Ratio: 1g coffee per 16-18g water. Varies by method: espresso 1:2-3, pour-over 1:15-17, French press 1:13-15, cold brew concentrate 1:4-8.
• 🥩 Cooking Time Science: Internal temperature, not clock time, determines doneness. Carryover cooking adds 5-10°F during rest. USDA safe temps: poultry 165°F, ground meat 160°F, pork 145°F.
• 📐 Recipe Scaling Math: Not all ingredients scale linearly. Spices and leavening agents need less than proportional increase when scaling 3×+. Eggs round to nearest whole number.
• 💰 Trip Budgeting: Major cost categories: flights (30-40%), accommodation (25-35%), food (15-20%), activities (10-15%), transport (5-10%). Always add 15% contingency for the unexpected.
• ⛽ Fuel Cost Planning: Fuel consumption increases 15-20% at 75 mph vs. 55 mph. Aerodynamic drag scales with speed squared — every 5 mph over 60 costs more than you think.
• 🕐 Time Zone Management: 38 time zones worldwide. DST varies by country. The 'golden hour' for global meetings: 8-9am PT = 4-5pm UK (only US→Europe overlap).
• 🚗 Mileage & Reimbursement: IRS business mileage rate: ~70¢/mile for 2026. Commuting is NOT deductible. Travel between work sites IS. Accurate mileage logs are essential for tax compliance.

Step-by-Step Guide

1. Scale the Recipe — Use Recipe Converter to adjust servings. If halving a recipe with 3 eggs, beat them and measure half by weight (~75g for 3 eggs).
2. Check Ratios — Use Baker's Percentage Calculator for bread, Coffee Ratio Calculator for brewing, or Food Calorie Calculator for nutrition tracking.
3. Calculate Timing — Use Cooking Time Calculator — enter weight, cooking method, and desired doneness. Always verify with a meat thermometer.
4. Handle Substitutions — Use Ingredient Substitution Calculator if missing an ingredient. Remember: baking is chemistry — substitutions affect texture and rise.
5. Set Your Budget — Use Travel Budget Calculator with your destination, duration, and travel style. It estimates per-category costs based on regional averages.
6. Plan Transportation — Use Fuel Cost Calculator for road trips (compare vehicles for efficiency). Use Mileage Calculator for business trips and reimbursement.

Expert Tips

• Always weigh ingredients for baking — 1 cup of flour can vary from 120-150g depending on how you scoop. A $20 kitchen scale is the best baking investment.
• The carryover cooking effect: remove meat 5-10°F BELOW target temp. It will rise during rest. Cutting immediately = dry meat (juices haven't redistributed).
• For coffee: water at 195-205°F (90-96°C). Too hot = bitter extraction. Too cold = sour, under-extracted. A gooseneck kettle gives pour-over control.
• Baking powder doesn't scale linearly. When doubling a cake recipe, use 1.5-1.75× the baking powder, not 2×. Otherwise your cake may over-rise and collapse.
• Can I just double all ingredients in a recipe?
• For savory cooking (soups, stews): generally yes, but season gradually. For baking: be cautious — leavening (baking powder/soda) and spices don't scale linearly.

Frequently Asked Questions

Can I just double all ingredients in a recipe?

For savory cooking (soups, stews): generally yes, but season gradually. For baking: be cautious — leavening (baking powder/soda) and spices don't scale linearly.

What's the best egg substitute for baking?

Depends on the recipe function: flax egg (binding, for cookies/muffins), applesauce (moisture, for cakes), commercial egg replacer (all-purpose), aquafaba/chickpea water (meringues/foam). No single substitute works for everything.

How much should I budget per day for travel?

Rough daily estimates: Southeast Asia $40-80, Eastern Europe $60-120, Western Europe $100-200, US/Canada $150-300, Japan/Australia $120-250. Budget vs. mid-range vs. luxury can halve or double these.

How do I schedule meetings across multiple time zones?

Use the Time Zone Converter. The only reliable US→Europe→Asia overlap is very limited. Rotate meeting times to share the burden of early/late calls fairly across your global team.

6 free tools in this category. No signup required, all processing client-side.