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    <title>calculatorapp.io — Free Calculators &amp; Guides</title>
    <link>https://calculatorapp.io</link>
    <description>Free calculators and guides for finance, health, cooking, AI, and everyday decisions. 41 tools across 7 categories — no sign-up required.</description>
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    <lastBuildDate>Sun, 26 Apr 2026 12:00:00 +0000</lastBuildDate>
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    <!-- ── COOKING ARTICLES ── -->
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      <title>How to Scale a Recipe: The Complete Guide to Multiplying and Dividing Any Dish</title>
      <link>https://calculatorapp.io/blog/how-to-scale-a-recipe.html</link>
      <description>Learn exactly how to scale any recipe up or down — with formulas, tips on ingredients that don't scale linearly (leavening, spices, eggs), and how to adjust cook time. References Smitten Kitchen, Serious Eats, Food Network Kitchen, Sally's Baking Addiction, and Escoffier.</description>
      <pubDate>Sat, 26 Apr 2026 08:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/how-to-scale-a-recipe.html</guid>
      <category>Cooking</category>
      <dc:creator>calculatorapp.io</dc:creator>
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    <item>
      <title>Coffee to Water Ratio Guide: The Perfect Ratio for Every Brew Method</title>
      <link>https://calculatorapp.io/blog/coffee-ratio-guide.html</link>
      <description>The definitive guide to coffee-to-water ratios for pour over, French press, espresso, cold brew, AeroPress, and drip. Includes the SCA Golden Ratio and how to adjust for strength and roast level. References the Specialty Coffee Association, Bean Ground, Methodical Coffee, and Coffee Slang.</description>
      <pubDate>Sat, 26 Apr 2026 08:30:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/coffee-ratio-guide.html</guid>
      <category>Coffee</category>
      <dc:creator>calculatorapp.io</dc:creator>
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    <item>
      <title>How to Calculate Food Cost Per Serving: A Guide for Home Cooks and Small Food Businesses</title>
      <link>https://calculatorapp.io/blog/food-cost-guide.html</link>
      <description>Learn how to calculate food cost per serving, food cost percentage, and recipe margins. Includes current USDA food price benchmarks (2026), food inflation data from the USDA ERS, and tips from Budget Bytes, The Kitchn, and Food52.</description>
      <pubDate>Sat, 26 Apr 2026 09:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/food-cost-guide.html</guid>
      <category>Cooking &amp; Budgeting</category>
      <dc:creator>calculatorapp.io</dc:creator>
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    <item>
      <title>Baking Pan Sizes &amp; Conversions: How to Switch Pan Sizes Without Ruining Your Recipe</title>
      <link>https://calculatorapp.io/blog/baking-pan-size-guide.html</link>
      <description>Complete guide to baking pan conversion formulas, volume charts, and time adjustments. Covers round, square, rectangular, loaf, bundt, and springform pans. References Sally's Baking Addiction, Food Network Kitchen, Taste of Home, Baking Like a Chef, and Chef Gail Sokol.</description>
      <pubDate>Sat, 26 Apr 2026 09:30:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/baking-pan-size-guide.html</guid>
      <category>Baking</category>
      <dc:creator>calculatorapp.io</dc:creator>
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    <item>
      <title>How Much Food Per Person? The Complete Portion Size Guide for Any Event</title>
      <link>https://calculatorapp.io/blog/portion-size-guide.html</link>
      <description>Exact food quantities per person for dinner parties, holiday meals, meal prep, and buffets. Based on catering industry standards with adjustments for meal type. References Serious Eats, Pinch of Yum, Escoffier School of Culinary Arts, The Kitchn, and Budget Bytes.</description>
      <pubDate>Sat, 26 Apr 2026 10:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/portion-size-guide.html</guid>
      <category>Cooking Tips</category>
      <dc:creator>calculatorapp.io</dc:creator>
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    <!-- ── EXISTING BLOG ARTICLES ── -->
    <item>
      <title>Sleep Timer: What It Is, How It Works &amp; Why You Should Use One Tonight</title>
      <link>https://calculatorapp.io/blog/sleep-timer-guide.html</link>
      <description>How 90-minute sleep cycles work, why waking between cycles eliminates grogginess, how an on-screen countdown changes your bedtime behavior, and 6 sleep hygiene tips backed by sleep science.</description>
      <pubDate>Tue, 22 Apr 2026 08:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/sleep-timer-guide.html</guid>
      <category>Lifestyle</category>
      <dc:creator>calculatorapp.io</dc:creator>
    </item>

    <item>
      <title>Metric to Imperial Conversion Guide: Every Formula You Need (2026)</title>
      <link>https://calculatorapp.io/blog/metric-to-imperial-guide.html</link>
      <description>Complete metric to imperial conversion guide. cm to inches, kg to lbs, Celsius to Fahrenheit, km to miles, liters to gallons — with exact formulas, quick-reference tables, and mental math shortcuts for every category.</description>
      <pubDate>Tue, 22 Apr 2026 09:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/metric-to-imperial-guide.html</guid>
      <category>Conversions</category>
      <dc:creator>calculatorapp.io</dc:creator>
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    <item>
      <title>AI API Cost Guide: How to Compare and Minimize Your LLM Spending</title>
      <link>https://calculatorapp.io/blog/ai-api-cost-guide.html</link>
      <description>How to calculate, compare, and reduce AI API costs across Claude, GPT-4o, and Gemini. Input vs output token pricing, batch discounts, and cost-per-query analysis for production applications.</description>
      <pubDate>Mon, 20 Apr 2026 08:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/ai-api-cost-guide.html</guid>
      <category>AI Tools</category>
      <dc:creator>calculatorapp.io</dc:creator>
    </item>

    <item>
      <title>VA Disability Combined Rating: How the Math Actually Works</title>
      <link>https://calculatorapp.io/blog/va-disability-combined-rating.html</link>
      <description>The VA disability combined rating formula explained — why adding 30% + 30% doesn't equal 60%, and how the whole-person method calculates your final combined rating and monthly compensation.</description>
      <pubDate>Sun, 19 Apr 2026 08:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/va-disability-combined-rating.html</guid>
      <category>Financial</category>
      <dc:creator>calculatorapp.io</dc:creator>
    </item>

    <item>
      <title>1099 vs W2: The True Cost of Being a Contractor</title>
      <link>https://calculatorapp.io/blog/1099-vs-w2-true-cost.html</link>
      <description>Why a $100k 1099 contract is not the same as a $100k salary — self-employment tax, benefits cost, quarterly payments, and deductions explained for freelancers and contractors making the switch.</description>
      <pubDate>Sat, 18 Apr 2026 08:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/1099-vs-w2-true-cost.html</guid>
      <category>Income</category>
      <dc:creator>calculatorapp.io</dc:creator>
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    <item>
      <title>How Many Calories Should I Eat Per Day?</title>
      <link>https://calculatorapp.io/blog/how-many-calories-should-i-eat.html</link>
      <description>How to calculate your TDEE (total daily energy expenditure) and set the right calorie target for your goal — weight loss, maintenance, or muscle gain — using the Mifflin-St Jeor equation.</description>
      <pubDate>Fri, 17 Apr 2026 08:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/how-many-calories-should-i-eat.html</guid>
      <category>Health</category>
      <dc:creator>calculatorapp.io</dc:creator>
    </item>

    <item>
      <title>House Hacking Guide: How to Get Paid to Live in Your Home</title>
      <link>https://calculatorapp.io/blog/house-hacking-guide.html</link>
      <description>How to use rental income from your primary residence to offset or eliminate your mortgage payment — strategies, numbers, tax implications, and the best property types for house hacking in 2026.</description>
      <pubDate>Thu, 16 Apr 2026 08:00:00 +0000</pubDate>
      <guid>https://calculatorapp.io/blog/house-hacking-guide.html</guid>
      <category>Financial</category>
      <dc:creator>calculatorapp.io</dc:creator>
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