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🎂Age Calculator·
🍺Alcohol Calculator·
📐Area Converter·
🖥️Aspect Ratio Calculator·
⚖️BMI Calculator·
💪Body Fat Calculator·
📊Break-Even Calculator·
🥗Calorie Calculator·
🔥Calories Burned Calculator·
🌍Carbon Footprint Calculator·
⭕Circumference Calculator·
📈Compound Interest Calculator·
🧱Concrete Calculator·
💳Credit Card Calculator·
💱Currency Converter·
💾Data Converter·
📅Date Difference Calculator·
🔬Density Calculator·
💧Dew Point Calculator·
🏷️Discount Calculator·
⚡Electricity Cost Calculator·
🏠Flooring Calculator·
➗Fraction Calculator·
💼Freelance Rate Calculator·
⛽Fuel Calculator·
🎓GPA Calculator·
📝Grade Calculator·
⛏️Gravel & Mulch Calculator·
☢️Half-Life Calculator·
❤️Heart Rate Calculator·
🌡️Heat Index Calculator·
🏋️Ideal Weight Calculator·
💰Inflation Calculator·
⚙️Kinetic Energy Calculator·
💡LED Resistor Calculator·
📏Length Converter·
🏦Loan Calculator·
📉Loan Payoff Calculator·
🥩Macro Calculator·
🔢Matrix Calculator·
🏡Mortgage Affordability Calculator·
💵Net Worth Calculator·
🔣Number Base Converter·
🔌Ohms Law Calculator·
🏋️One Rep Max Calculator·
📆Ovulation Calculator·
🎨Paint Calculator·
🔐Password Strength Checker·
💸Paycheck Calculator·
💯Percentage Calculator·
🏊Pool Volume Calculator·
🤰Pregnancy Calculator·
🌬️Pressure Converter·
🔍Prime Number Checker·
📊Profit Margin Calculator·
📐Pythagorean Theorem Calculator·
🔣Quadratic Formula Calculator·
🎲Random Number Generator·
📚Reading Time Calculator·
🏖️Retirement Calculator·
📈ROI Calculator·
🏛️Roman Numeral Converter·
🏃Running Pace Calculator·
🎯Savings Goal Calculator·
🧮Scientific Calculator·
🔬Scientific Notation Converter·
😴Sleep Calculator·
☀️Solar Panel Calculator·
🚀Speed Calculator·
🪜Stair Calculator·
🔢Standard Calculator·
📊Statistics Calculator·
🌐Subnet Calculator·
🌡️Temperature Converter·
🏗️Tile Calculator·
⏱️Time Duration Calculator·
🌐Time Zone Converter·
🍽️Tip Calculator·
🛒Unit Price Calculator·
🧾VAT Calculator·
⚡Voltage Divider Calculator·
💧Water Intake Calculator·
⚖️Weight Converter·
🌬️Wind Chill Calculator·
💰AU Income Tax·
🏠Stamp Duty Calculator·
🦘Superannuation·
📚HECS-HELP Repayment·
🏡AU Home Loan·
🧾GST Calculator·
📋Redundancy Pay·
🎓ATAR Estimator·
🎂Age Calculator·
🍺Alcohol Calculator·
📐Area Converter·
🖥️Aspect Ratio Calculator·
⚖️BMI Calculator·
💪Body Fat Calculator·
📊Break-Even Calculator·
🥗Calorie Calculator·
🔥Calories Burned Calculator·
🌍Carbon Footprint Calculator·
⭕Circumference Calculator·
📈Compound Interest Calculator·
🧱Concrete Calculator·
💳Credit Card Calculator·
💱Currency Converter·
💾Data Converter·
📅Date Difference Calculator·
🔬Density Calculator·
💧Dew Point Calculator·
🏷️Discount Calculator·
⚡Electricity Cost Calculator·
🏠Flooring Calculator·
➗Fraction Calculator·
💼Freelance Rate Calculator·
⛽Fuel Calculator·
🎓GPA Calculator·
📝Grade Calculator·
⛏️Gravel & Mulch Calculator·
☢️Half-Life Calculator·
❤️Heart Rate Calculator·
🌡️Heat Index Calculator·
🏋️Ideal Weight Calculator·
💰Inflation Calculator·
⚙️Kinetic Energy Calculator·
💡LED Resistor Calculator·
📏Length Converter·
🏦Loan Calculator·
📉Loan Payoff Calculator·
🥩Macro Calculator·
🔢Matrix Calculator·
🏡Mortgage Affordability Calculator·
💵Net Worth Calculator·
🔣Number Base Converter·
🔌Ohms Law Calculator·
🏋️One Rep Max Calculator·
📆Ovulation Calculator·
🎨Paint Calculator·
🔐Password Strength Checker·
💸Paycheck Calculator·
💯Percentage Calculator·
🏊Pool Volume Calculator·
🤰Pregnancy Calculator·
🌬️Pressure Converter·
🔍Prime Number Checker·
📊Profit Margin Calculator·
📐Pythagorean Theorem Calculator·
🔣Quadratic Formula Calculator·
🎲Random Number Generator·
📚Reading Time Calculator·
🏖️Retirement Calculator·
📈ROI Calculator·
🏛️Roman Numeral Converter·
🏃Running Pace Calculator·
🎯Savings Goal Calculator·
🧮Scientific Calculator·
🔬Scientific Notation Converter·
😴Sleep Calculator·
☀️Solar Panel Calculator·
🚀Speed Calculator·
🪜Stair Calculator·
🔢Standard Calculator·
📊Statistics Calculator·
🌐Subnet Calculator·
🌡️Temperature Converter·
🏗️Tile Calculator·
⏱️Time Duration Calculator·
🌐Time Zone Converter·
🍽️Tip Calculator·
🛒Unit Price Calculator·
🧾VAT Calculator·
⚡Voltage Divider Calculator·
💧Water Intake Calculator·
⚖️Weight Converter·
🌬️Wind Chill Calculator·
💰AU Income Tax·
🏠Stamp Duty Calculator·
🦘Superannuation·
📚HECS-HELP Repayment·
🏡AU Home Loan·
🧾GST Calculator·
📋Redundancy Pay·
🎓ATAR Estimator·
🖥️
Math
15🖥️
Aspect Ratio Calculator
Calculate display aspect ratios
Open →MAT
⭕Circumference Calculator
Calculate circle circumference
Open →MAT
➗Fraction Calculator
Add, subtract, multiply fractions
Open →MAT
🔢Matrix Calculator
Matrix math operations
Open →MAT
🔣Number Base Converter
Convert between number bases
Open →MAT
💯Percentage Calculator
Calculate percentages instantly
Open →MAT
🔍Prime Number Checker
Check if a number is prime
Open →MAT
📐Pythagorean Theorem Calculator
Solve right triangle sides
Open →MAT
🔣Quadratic Formula Calculator
Solve quadratic equations
Open →MAT
🎲Random Number Generator
Generate random numbers
Open →MAT
🏛️Roman Numeral Converter
Convert numbers to Roman numerals
Open →MAT
🧮Scientific Calculator
Full featured scientific calculator
Open →MAT
🔬Scientific Notation Converter
Convert to and from scientific notation
Open →MAT
🔢Standard Calculator
Basic arithmetic calculator
Open →MAT
📊Statistics Calculator
Mean, median, mode and more
Open →MAT
📊
Finance
16📊
Break-Even Calculator
Find your break-even point
Open →FIN
📈Compound Interest Calculator
Calculate compound interest growth
Open →FIN
💳Credit Card Calculator
Credit card payoff estimator
Open →FIN
💱Currency Converter
Convert between currencies
Open →FIN
💼Freelance Rate Calculator
Calculate your hourly freelance rate
Open →FIN
💰Inflation Calculator
Calculate inflation impact over time
Open →FIN
🏦Loan Calculator
Monthly payment and interest calculator
Open →FIN
📉Loan Payoff Calculator
Calculate loan payoff timeline
Open →FIN
🏡Mortgage Affordability Calculator
How much house can you afford
Open →FIN
💵Net Worth Calculator
Calculate your total net worth
Open →FIN
💸Paycheck Calculator
Estimate your take-home pay
Open →FIN
📊Profit Margin Calculator
Calculate business profit margins
Open →FIN
🏖️Retirement Calculator
Plan your retirement savings
Open →FIN
📈ROI Calculator
Calculate return on investment
Open →FIN
🎯Savings Goal Calculator
Plan how to reach a savings target
Open →FIN
🧾VAT Calculator
Add or remove VAT from prices
Open →FIN
🍺
Health
14🍺
Alcohol Calculator
Blood alcohol content estimator
Open →HEA
⚖️BMI Calculator
Body mass index calculator
Open →HEA
💪Body Fat Calculator
Estimate your body fat percentage
Open →HEA
🥗Calorie Calculator
Daily calorie needs estimator
Open →HEA
🔥Calories Burned Calculator
Calories burned during exercise
Open →HEA
❤️Heart Rate Calculator
Target heart rate zones
Open →HEA
🏋️Ideal Weight Calculator
Calculate your ideal body weight
Open →HEA
🥩Macro Calculator
Calculate daily macronutrient targets
Open →HEA
🏋️One Rep Max Calculator
Calculate your 1RM for lifts
Open →HEA
📆Ovulation Calculator
Estimate ovulation and fertile window
Open →HEA
🤰Pregnancy Calculator
Calculate due date and milestones
Open →HEA
🏃Running Pace Calculator
Calculate running pace and finish time
Open →HEA
😴Sleep Calculator
Calculate ideal sleep and wake times
Open →HEA
💧Water Intake Calculator
Daily water intake recommendation
Open →HEA
📐
Science
18📐
Area Converter
Convert between area units
Open →SCI
🌍Carbon Footprint Calculator
Estimate your carbon emissions
Open →SCI
💾Data Converter
Convert between data units
Open →SCI
🔬Density Calculator
Calculate mass, volume, density
Open →SCI
💧Dew Point Calculator
Calculate atmospheric dew point
Open →SCI
☢️Half-Life Calculator
Radioactive decay calculator
Open →SCI
🌡️Heat Index Calculator
Feels-like temperature calculator
Open →SCI
⚙️Kinetic Energy Calculator
Calculate kinetic energy of objects
Open →SCI
💡LED Resistor Calculator
Calculate LED series resistor value
Open →SCI
📏Length Converter
Convert between length units
Open →SCI
🔌Ohms Law Calculator
Calculate voltage, current, resistance
Open →SCI
🌬️Pressure Converter
Convert between pressure units
Open →SCI
☀️Solar Panel Calculator
Estimate solar panel output and savings
Open →SCI
🚀Speed Calculator
Calculate speed, distance, or time
Open →SCI
🌡️Temperature Converter
Convert between temperature scales
Open →SCI
⚡Voltage Divider Calculator
Calculate voltage divider circuits
Open →SCI
⚖️Weight Converter
Convert between weight units
Open →SCI
🌬️Wind Chill Calculator
Calculate wind chill temperature
Open →SCI
🏷️
Everyday
8🏷️
Discount Calculator
Calculate sale prices and savings
Open →EVE
⚡Electricity Cost Calculator
Estimate electricity costs
Open →EVE
⛽Fuel Calculator
Calculate trip fuel costs
Open →EVE
🔐Password Strength Checker
Check how strong your password is
Open →EVE
📚Reading Time Calculator
Estimate reading time for text
Open →EVE
🌐Subnet Calculator
Calculate IP subnets and CIDR ranges
Open →EVE
🍽️Tip Calculator
Calculate tips and split bills
Open →EVE
🛒Unit Price Calculator
Compare unit prices while shopping
Open →EVE
🎂
Date & Time
4🧱
Construction
7🧱
Concrete Calculator
Estimate concrete volume needed
Open →CON
🏠Flooring Calculator
Estimate flooring materials needed
Open →CON
⛏️Gravel & Mulch Calculator
Estimate gravel or mulch needed
Open →CON
🎨Paint Calculator
Estimate paint needed for a room
Open →CON
🏊Pool Volume Calculator
Calculate swimming pool volume
Open →CON
🪜Stair Calculator
Calculate stair dimensions and rise/run
Open →CON
🏗️Tile Calculator
Estimate tiles needed for a floor or wall
Open →CON
🎓
Education
2💰
Australia Specific
8💰
AU Income Tax
2025-26 take-home pay & tax breakdown
Open →AUS
🏠Stamp Duty Calculator
All states — NSW, VIC, QLD, WA, SA, TAS, ACT, NT
Open →AUS
🦘Superannuation
Retirement projection with 12% SG rate
Open →AUS
📚HECS-HELP Repayment
2025-26 marginal repayment rates + payoff timeline
Open →AUS
🏡AU Home Loan
Repayments with offset account & P&I vs IO
Open →AUS
🧾GST Calculator
Add or remove 10% Australian GST instantly
Open →AUS
📋Redundancy Pay
Fair Work notice period & severance entitlements
Open →AUS
🎓ATAR Estimator
HSC, VCE, QCE, WACE & SACE with subject scaling
Open →AUS
Why Calcosmos
Built for real people
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⚡
Instant results
Every calculation updates live as you type. No submit buttons, no loading.
📱
Works everywhere
Fully responsive - as comfortable on mobile as on a wide desktop monitor.
🔍
Searchable
Fuzzy search across all calculators by name, category, or keyword.
🎨
Beautifully designed
Dark, modern UI with a consistent design language across every calculator.
🏗️
Easily extensible
Add a new calculator in minutes - one file and one registry entry.
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