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✖️ Rule of Three

Solve proportions with the rule of three. Free instant calculator.

If

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Then

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Result

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📐 Math

% Percentage 📈 Percentage Change 📉 Average ✖️ Rule of Three 📐 Pythagorean Theorem √ Square Root ^ Exponent ½ Fraction E Scientific Notation 🎲 Random Number log Logarithm %% Percentage of Percentage

🔄 Converters

📏 Length ⚖️ Weight 🌡 Temperature 🫗 Volume 📐 Area 🏎 Speed 💾 Data Size ⏱ Time 🌍 Time Zone 01 Number Base 👟 Shoe Size 👕 Clothing Size 🍳 Cooking Unit

💰 Finance

💰 Tip 📊 Profit Margin 🧾 VAT 🏦 Loan 💹 Compound Interest 🏷 Discount 💼 Salary to Hourly 💱 Currency 🧮 Sales Tax 🏠 Mortgage

❤️ Health & Body

🏃 BMI 🔥 Calories Burned 🍽 Daily Calorie Intake ⚖️ Ideal Weight 📏 Body Fat 💧 Water Intake 🤰 Due Date 😴 Sleep

📅 Date & Time

🎂 Age 📅 Days Between Dates 📆 Add Days to Date ⏳ Countdown 🕐 Unix Timestamp 📋 Week Number

🛠 Text & Tools

📝 Word & Character Counter 🔐 Password Aa Text Case 📄 Lorem Ipsum # Hash

🏠 Everyday Life

⛽ Gas/Fuel Cost ⚡ Electricity Cost 🏗 Concrete 🎨 Paint 🔲 Tile 📱 Screen Time 🎉 Event Food 🐕 Dog Age