SmartCalc
All-in-One
Finance & Wealth
Inflation Calculator
Calculate the purchasing power of money over time.
Korea Salary Calculator (Net)
Calculate your estimated net income for 2025 in Korea.
Hourly to Monthly Calc
Calculate monthly salary based on hourly wage and hours worked.
Holiday Pay Calc (KR)
Calculate mandatory weekly holiday pay in Korea.
US Salary Calculator (Federal)
Calculate US federal take-home pay for 2024.
Germany Salary Calculator (Brutto-Netto)
Calculate net salary in Germany (2024 Tax Class 1).
UK Salary Calculator (Take Home Pay)
Calculate Take Home Pay for 2024/25.
France Salary Calculator (Brut en Net)
Convert Gross Salary (Brut) to Net Salary (Net) in France (2024).
Netherlands Salary Calculator
Calculate Net Salary in Netherlands including 30% Ruling (2024).
Japan Salary Calculator
Calculate Net Salary in Japan (Tokyo rates, 2025).
Compound Interest Calc
Calculate the power of compound interest for savings/investments.
VAT Calculator
Calculate Supply Value and VAT from Total.
Loan Calculator (Amortization)
Calculate monthly payments (Amortization).
Savings Goal
Monthly savings needed for goal
Simple Interest
Interest on principal only
Inflation Calculator
Future value of money
ROI Calculator
Return on Investment
Break-even Point
Calculate BEP
Tip Calculator
Calculate gratuity
Fuel Cost
Trip cost based on MPG/Distance
Electricity Cost
Device energy cost
CPM Calculator
Cost Per Mille
Margin Calculator
Profit Margin
Margin & Markup Calc
Calculate margin and markup based on cost and selling price.
Sales Tax & VAT Calculator
Calculate tax based on net amount and tax rate.
Stock & Crypto Profit
Calculate profit and ROI from buy/sell price and quantity.
CAGR Calculator
Calculate Compound Annual Growth Rate.
Health & Fitness
BMI Calculator
Calculate Body Mass Index based on height and weight.
Ovulation Calculator
Predict ovulation and fertile window from LMP.
Pregnancy Due Date
Calculate due date based on Last Menstrual Period.
BMR Calculator
Calculate Basal Metabolic Rate using Harris-Benedict.
Calorie Calculator (TDEE)
Calculate Total Daily Energy Expenditure based on activity.
Body Fat Percentage
US Navy Method Estimate
Ideal Weight
Based on Height (Devine)
Water Intake
Daily recommended water
Heart Rate Zone
Karvonen Formula Zones
One Rep Max
Estimate Max Strength
Protein Intake
Daily Protein Needs
Target Weight (Reverse BMI)
Weight for target BMI
Waist-to-Height Ratio
Obesity Indicator
Creatine Intake
Loading/Maintenance phase
Steps to Calories
Estimate calories derived from steps
Body Fat Calc (Navy)
Estimate body fat percentage using body measurements.
1RM Calculator
Calculate your One Rep Max (1RM) based on weight and reps.
Sleep Calculator
Find best wake/sleep times
Life & Handy
Tip Calculator
Calculate tip and split the bill between people.
D-Day Calculator
Count down days to your important events.
International Age Calc
Calculate your exact international age from birthdate.
Meeting Cost Calc
Calculate the cost of a meeting based on attendees and salary.
Rent Conversion Calc
Convert between Jeonse (Deposit) and Monthly Rent.
Date Difference
Days between two dates
Time Duration
Hours/Minutes between times
Add Days to Date
Add/Sub days from date
Business Days
Add business days (skip weekends)
Age in Weeks
Total weeks/days alive
Days Until
Countdown to date
Work Hours
Calculate hours worked
Leap Year Checker
Check if year is Leap Year
Age Calculator
Exact age in years, months, days
Global & Taxes
Math & Engineering
Fraction Calculator
Perform arithmetic operations with fractions.
Percentage Calculator
Calculate percentage of a value.
Unit Converter
Convert Length (cm/inch) and Weight (kg/lb).
GCD / LCM
Calculate Great. Common Divisor & Least Common Multiple
Circle Calculator
Area and Circumference
Triangle Area
Base and Height
Pythagorean Calc
Hypotenuse length
Sphere Calculator
Volume and Surface Area
Random Number Gen
Generate random integer
Average Calculator
Average of comma numbers
Linear Interpolation
Estimate value between two points
Percentage Change
Increase/Decrease %
Cube Calculator
Volume/Surface from edge
Time to Decimal
Convert Hours:Minutes to Decimal
Decimal to Time
Convert Decimal to Hours:Minutes
Speed Converter
Convert speed units
Temp Converter
Celsius, Fahrenheit, Kelvin
Area Converter
sq m, sq ft, ac, ha
Volume Converter
L, gal, oz
Time Unit Converter
sec, min, hr, day
Data Storage
MB, GB, TB
Energy Converter
Joules, Calories, kWh
Pressure Converter
bar, psi, Pa
Power Converter
Watt, Horsepower
Angle Converter
Degree, Radian
Shopping & Sales
IT & Dev Tools
Base Converter (Bin/Dec/Hex)
Convert numbers between different bases.
Data Unit Converter
Convert between data units like MB, GB, TB.
HEX ↔ RGB Color Converter
Convert between HEX and RGB color formats.
JSON Size Calculator
Calculate the size of a JSON string in bytes.
Scientific Notation Converter
Convert between decimal numbers and scientific notation.
Fun & Fortune
Love Calculator
Calculate love compatibility (%) between two names.
Love Calculator
Check compatibility between two names
Zodiac Sign Finder
Find your zodiac sign by birthday
Chinese Zodiac
Find your Chinese zodiac animal
Lucky Number
What is your lucky number today?
Biorhythm
Check your physical, emotional, intellectual rhythm