Free Online Calculators & Converters
BMI, mortgage, age, unit, currency converters — all free, all instant.
🔢 Most Popular
BMI Calculator
Calculate Body Mass Index with category
🏠Kalkulator Cicilan KPR
Hitung cicilan KPR per bulan
🎂Age Calculator
Calculate exact age and next birthday
%Percentage Calculator
Calculate percentages in 3 modes
📏Unit Converter
Length, weight, temperature, and more
💱Currency Converter
Real-time currency conversion
🧮 More Tools
Discount Calculator
Calculate sale price and savings
💰Tip Calculator
Calculate tip and split the bill
📅Date Calculator
Days between dates, add/subtract days
🏦Loan Calculator
Monthly payment and total interest
⛽Fuel Cost Calculator
Calculate trip fuel cost
🍎Calorie Calculator
Calculate BMR and daily calorie needs
🌍Timezone Converter
Convert time between timezones
🔬Scientific Calculator
Advanced math with trig and log
📚 All Tools
GPA Calculator
Calculate semester and cumulative GPA
💡Electricity Cost Calculator
Estimate monthly electricity bill
🧾VAT/Tax Calculator
Calculate VAT and tax amounts
🏛️Roman Numeral Converter
Convert between Roman and Arabic numerals
📐Triangle Calculator
Calculate area, perimeter, angles
🚗Speed Calculator
Calculate speed, distance, or time
🏋️Body Fat Calculator
Estimate body fat percentage
📈Investment Calculator
Calculate compound interest returns
🔢Fibonacci Generator
Generate Fibonacci sequence
⚡Ohm's Law Calculator
Calculate voltage, current, resistance
📡Data Speed Converter
Convert between data transfer units
🧱Material Calculator
Calculate building material needs