Calculators

Discount Calculator

Calculate single and stacked discounts, final sale price with tax, and savings amount. Perfect for shopping deals and promotions. Free online discount and sale price calculator.

Percentage Calculator

Calculate percentages, percentage change, increase, decrease, and ratio conversions with multiple calculation modes. Free online percentage calculator for math and finance.

Age Calculator

Calculate your exact age in years, months, days, hours. Find your zodiac sign and next birthday countdown.

BMI Calculator

Calculate your Body Mass Index using metric or imperial units. View BMI categories, healthy weight range, and personalized health insights. Free online BMI calculator.

Calorie Calculator

Calculate daily calorie needs using the Mifflin-St Jeor equation. Get BMR, TDEE, and calorie targets for weight loss, maintenance, or gain. Free online calorie calculator.

Tip Calculator

Calculate tip amounts and split the bill among friends with preset tip percentages and a convenient round-up option. Free online tip calculator for restaurants and services.

Fuel Cost Calculator

Calculate fuel cost for any trip based on distance, vehicle mileage, and fuel price. Round trip toggle and cost-per-km breakdown included. Free online fuel cost calculator.

BMR Calculator

Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. Free online BMR calculator for fitness planning.

GPA Calculator

Calculate your cumulative GPA on a 4.0 scale by adding courses with credits and letter grades. Supports weighted and unweighted calculations. Free online GPA calculator.

Binary Calculator

Perform binary, decimal, and hexadecimal arithmetic with bitwise operations (AND, OR, XOR, NOT). Visual bit representation included. Free online binary calculator.

Rent Split Calculator

Split rent fairly among roommates — equally or proportionally by income. Add shared utilities and calculate each person's fair share. Free online rent split calculator.

Sleep Calculator

Calculate optimal bedtime and wake-up times based on 90-minute sleep cycles. Get recommendations for better rest and improved energy. Free online sleep cycle calculator.

Body Fat Calculator

Calculate your body fat percentage using the US Navy method with neck, waist, and hip measurements. Visual gauge with fitness category display. Free online body fat calculator.

Pace Calculator

Calculate running pace, distance, or finish time with race presets for 5K, 10K, half marathon, and marathon. Splits table included. Free online running pace calculator.

Ideal Weight Calculator

Calculate your ideal body weight using four proven formulas: Devine, Robinson, Miller, and Hamwi. Includes BMI-based healthy weight range. Free online ideal weight calculator.

Dice Roller

Roll virtual dice — d4, d6, d8, d10, d12, d20, and d100 with multiple dice, modifiers, and full roll history tracking. Perfect for tabletop RPGs. Free online dice roller.

Electricity Bill Calculator

Calculate your electricity bill with tiered slab rates, editable rate structures, fixed charges, and tax percentages. Free online electricity bill estimator for any provider.

Date Difference

Calculate the exact difference between two dates in years, months, days, and hours. Includes business days and weekend counts. Free online date difference calculator.

Scientific Calculator

Full-featured scientific calculator with trigonometric, logarithmic, and memory functions. Supports sin, cos, tan, sqrt, factorial, and more. Free online scientific calculator.

Love Calculator

Check love compatibility between two names with a fun deterministic hash-based scoring algorithm. Animated heart display and shareable results. Free online love calculator.

Random Number Generator

Generate random numbers with custom range, count, and sorting options. Includes dice roll and coin flip modes for quick decisions. Free online random number generator.

Time Duration Calculator

Add or subtract time durations with ease. Convert between hours, minutes, and seconds with total seconds display. Great for payroll and scheduling. Free online time duration calculator.

Water Intake Calculator

Calculate your recommended daily water intake based on body weight, activity level, and climate conditions. Track glasses visually throughout the day. Free online water intake calculator.

Lottery Number Generator

Generate random lottery numbers for Powerball, Mega Millions, EuroMillions, or custom game configurations. Full draw history tracking included. Free online lottery number generator.

Steps to Calories

Convert your daily step count to calories burned based on walking or running mode, body weight, and stride length. Distance estimate included. Free online steps to calories calculator.

Grade Calculator

Calculate overall percentage and letter grades from subject-wise marks. Add subjects dynamically and view individual subject performance. Free online grade calculator for students.

Expense Splitter

Split shared expenses among friends and calculate minimum settlement transactions. See exactly who owes whom and how much to settle up. Free online expense splitter.

Password Entropy Calculator

Analyze password entropy in bits with estimated crack time at various attack speeds and a visual strength meter. Improve your password security. Free online password entropy calculator.

Time Addition Tool

Add and subtract multiple time durations with a running total displayed in HH:MM:SS format. Perfect for timesheets, payroll, and project tracking. Free online time addition tool.

Countdown Calculator

Calculate the number of days until any future date including business days, weeks, and months breakdown. Perfect for deadline tracking and event planning. Free online countdown calculator.

Age in Days Calculator

Calculate your exact age in total days, hours, and minutes lived. Discover upcoming milestones like your 10,000th or 20,000th day alive. Free online age in days calculator.

Fibonacci Calculator

Generate the Fibonacci number sequence with golden ratio convergence tracking and BigInt precision for large numbers. Visual ratio chart included. Free online Fibonacci calculator.

Running Calculator

Calculate running pace, distance, or finish time with per-kilometer split tables and pace zone charts. Supports metric and imperial units. Free online running pace calculator.

Pregnancy Calculator

Calculate your estimated due date, current gestational age, and trimester from your last menstrual period date. Week-by-week pregnancy milestones included. Free online pregnancy calculator.

Ovulation Calculator

Calculate your ovulation date and fertile window based on menstrual cycle length. Includes next period prediction and conception tips. Free online ovulation and fertility calculator.