Calculators You Use Every Day
50+ practical calculators in one place
88 calculators
BMI Calculator
Calculate your Body Mass Index by height, weight, and gender.
Calorie Calculator
Calculate your daily calorie needs (TDEE) and basal metabolic rate (BMR).
Body Fat Calculator
Estimate your body fat percentage using waist, neck, and hip measurements.
Ideal Weight Calculator
Calculate the ideal weight range based on height and gender.
Daily Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity level.
Pregnancy Calculator
Calculate pregnancy weeks and due date from the last menstrual period.
Ovulation Calculator
Predict ovulation date and fertile window based on menstrual cycle.
Loan Calculator
Calculate monthly payments and total interest for loans.
Compound Interest Calculator
Calculate compound interest growth with principal, rate, and time.
Currency Converter
Convert between major currencies with up-to-date exchange rates.
Tax Calculator
Calculate VAT, income tax, and other taxes easily.
Savings Goal Calculator
Enter your savings goal and timeline to find the monthly amount needed.
Tip Calculator
Calculate tip amount and split the bill per person.
ROI Calculator
Calculate Return on Investment (ROI) from investment and profit.
Percentage Calculator
Easily calculate percentages, percentage change, and ratios.
Fraction Calculator
Add, subtract, multiply, and divide fractions with simplification.
Scientific Calculator
Supports advanced math: trigonometry, logarithms, exponents, and more.
GCD & LCM Calculator
Calculate the Greatest Common Divisor and Least Common Multiple.
Prime Factorization Calculator
Factorize natural numbers into prime factors and check primality.
Length Converter
Convert between cm, m, km, inches, feet, miles, and more.
Weight Converter
Convert between kg, g, lb (pounds), oz (ounces), and more.
Temperature Converter
Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K).
Area Converter
Convert between m², km², acres, hectares, and more.
Speed Converter
Convert between km/h, m/s, mph, knots, and more.
Data Storage Converter
Convert between Byte, KB, MB, GB, TB, PB, and more.
Age Calculator
Calculate your exact age, Korean age, and zodiac sign from birthdate.
Date Difference Calculator
Calculate the number of days, weeks, and months between two dates.
Time Zone Converter
Convert time between major cities and time zones worldwide.
Sleep Calculator
Calculate the best wake-up or bedtime based on sleep cycles.
Fuel Cost Calculator
Calculate fuel cost from distance, fuel efficiency, and gas price.
Electricity Bill Calculator
Estimate your electricity bill from monthly kWh usage.
GPA Calculator
Calculate your Grade Point Average (GPA) from course grades and credits.
Discount Calculator
Calculate discount amount and final price from original price and discount rate.
Concrete Calculator
Calculate the amount of concrete needed for your construction project.
Recipe Unit Converter
Convert between cups, tablespoons, teaspoons, ml, grams, and more.
Blood Alcohol Content Calculator
Estimate Blood Alcohol Content (BAC) from drinks, weight, and time.
Caffeine Intake Calculator
Calculate caffeine content in coffee, tea, and energy drinks vs. daily limits.
Ohm's Law Calculator
Calculate voltage (V), current (A), resistance (Ω), and power (W).
Density Calculator
Calculate density from mass and volume, and identify materials.
Speed, Distance & Time Calculator
Calculate speed, distance, or time given the other two values.
Children BMI Calculator
Calculate BMI percentile for children and teens aged 2-20.
Heart Rate Zone Calculator
Calculate exercise heart rate zones from age and max heart rate.
Protein Intake Calculator
Calculate daily recommended protein intake based on weight, activity, and goals.
Macronutrient Calculator
Calculate optimal carbs, protein, and fat ratios based on your goals.
Mortgage Calculator
Calculate monthly mortgage payments, total interest, and amortization.
Retirement Calculator
Estimate retirement savings needed based on current age, retirement age, and savings.
Inflation Calculator
Calculate the change in purchasing power due to inflation over time.
BMI Calculator (Imperial)
Calculate BMI using feet, inches, and pounds (imperial units).
Running Pace Calculator
Calculate running pace, speed, and estimated finish time from distance and time.
VO2max Calculator
Estimate your VO2max (maximal oxygen uptake) from age, gender, and exercise data.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
Random Number Generator
Generate random numbers in a range, lottery picks, and dice rolls.
Unit Price Calculator
Calculate and compare unit prices to find the best value.
Paint Calculator
Calculate the amount of paint needed for a room based on size and coats.
Sober Time Calculator
Estimate the time needed for blood alcohol to fully clear after drinking.
Solar Panel Calculator
Calculate the number of solar panels needed and estimated savings based on power usage.
Carbon Footprint Calculator
Calculate your carbon footprint from lifestyle, transportation, and energy use.
Numerology Calculator
Calculate your life path number and destiny number from birthdate and name.
Position Size Calculator
Calculate optimal position size based on account balance and risk tolerance.
Futures PnL Calculator
Calculate expected PnL, ROI, and fees for futures trading.
Liquidation Price Calculator
Predict liquidation price for long/short positions with leverage.
Take Profit / Stop Loss Calculator
Calculate TP/SL prices based on desired percentage and fees.
Break-Even Price Calculator
Calculate break-even price considering DCA and fees.
Risk-Reward Ratio Calculator
Analyze R:R ratio, expected value, and required win rate.
Leverage Optimizer
Recommend safe maximum leverage based on account size and drawdown.
Margin Requirement Calculator
Calculate initial and maintenance margin for positions.
Funding Rate Impact Calculator
Predict cumulative funding costs for perpetual futures.
Slippage & Fee Simulator
Simulate real PnL reflecting slippage and exchange fees.
DCA Profit Simulator
Simulate DCA strategy returns and portfolio value.
DCA Breakeven Price
Calculate breakeven price and required pump after DCA.
Portfolio Rebalancing
Suggest buy/sell amounts to reach target asset allocation.
Accumulation Phase
Predict time needed to reach portfolio goal with monthly investments.
HODL Return Projector
Project HODL returns based on future price targets.
Options Greeks Calculator
Calculate Delta, Gamma, Theta, Vega for options trading.
IV Rank Calculator
Calculate IV Percentile and Rank compared to history.
Pair Trading Spread
Calculate spread and cointegration for pair trading.
Arbitrage Opportunity
Identify price differences between exchanges or markets.
Grid Trading Simulator
Simulate grid trading returns and drawdown.
Martingale Calculator
Calculate risk and recovery for Martingale strategies.
Trailing Stop Optimizer
Recommend ATR-based trailing stop distance.
Maximum Drawdown Simulator
Estimate MDD and recovery time based on volatility.
Portfolio Volatility (VaR)
Calculate total portfolio volatility and VaR.
Kelly Criterion Calculator
Recommend optimal bet size based on win rate and R:R.
Tax Liability Estimator
Estimate capital gains tax for crypto and stocks.
Inflation-Adjusted Return
Calculate real return considering inflation rate.
Mining Profitability
Predict mining returns based on hashrate and power cost.
Staking/Airdrop Yield
Calculate APY and total yield for staking/airdrops.
Exchange Fee Comparator
Compare fees across multiple exchanges for best routes.