Popular

BMI Calculator

Calculate your Body Mass Index (BMI) and get personalized health recommendations based on WHO guidelines.

1 min
12.5k uses
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Popular

Calorie Calculator

Estimate daily calorie needs based on age, sex, weight, height and activity level for weight management.

2 min
11.8k uses
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Health

Body Fat Calculator

Estimate body fat percentage using US Navy method and other tape-measure formulas.

2 min
3.9k uses
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Health

Ideal Weight Calculator

Find your ideal body weight range using multiple scientific formulas (Devine, Robinson, Miller).

1 min
7.2k uses
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Health

Pace Calculator

Convert between running pace, speed, time, and distance for training plans and race goals.

45 sec
5.1k uses
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Health

Pregnancy Calculator

Calculate due date, conception date, and track pregnancy week by week with trimester milestones.

1 min
8.6k uses
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Health

Ovulation Calculator

Predict your most fertile days and ovulation date based on menstrual cycle length.

30 sec
6.4k uses
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Health

Blood Alcohol Calculator

Estimate blood alcohol content (BAC) based on drinks consumed, weight, and time elapsed.

1 min
4.1k uses
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New

Macro Calculator

Calculate optimal macronutrient ratios (protein, carbs, fats) for your fitness goals.

2 min
5.8k uses
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Health

Water Intake Calculator

Determine your daily water intake needs based on weight, activity level, and climate.

30 sec
3.2k uses
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Health

Heart Rate Calculator

Calculate maximum heart rate and training zones for optimal cardio workouts.

1 min
4.7k uses
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Health

Sleep Calculator

Find the best time to wake up or go to bed based on 90-minute sleep cycles.

30 sec
6.9k uses
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Popular

Loan Calculator

Estimate monthly payments, total interest, and generate an amortization schedule for any loan.

2 min
9.7k uses
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Popular

Mortgage Calculator

Calculate monthly mortgage payments, total interest, and view detailed amortization schedules.

3 min
14.4k uses
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Popular

Compound Interest Calculator

Calculate investment growth with compound interest by year, month, or custom periods.

1 min
13.1k uses
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Finance

Simple Interest Calculator

Calculate simple interest on loans or investments with principal, rate, and time period.

45 sec
5.3k uses
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Finance

Investment Calculator

Project investment returns with regular contributions and compound growth over time.

2 min
8.9k uses
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Finance

Retirement Calculator

Plan your retirement savings and see if you're on track to meet your retirement goals.

3 min
7.6k uses
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Finance

Discount Calculator

Quickly find the final price after discount and the amount you save on purchases.

15 sec
4.3k uses
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Finance

Tax Calculator

Estimate your income tax liability and potential refund based on income and deductions.

4 min
10.2k uses
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Finance

Salary Calculator

Convert between hourly, daily, monthly, and annual salary with tax considerations.

1 min
6.8k uses
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Finance

Tip Calculator

Calculate tip amount and split bills among multiple people at restaurants.

30 sec
5.9k uses
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Popular

Currency Converter

Convert between 150+ world currencies with real-time exchange rates.

30 sec
18.2k uses
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Finance

Car Loan Calculator

Calculate monthly car payments, total interest, and affordability for auto loans.

2 min
7.1k uses
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New

Debt Payoff Calculator

Create a debt payoff plan using snowball or avalanche method to become debt-free.

3 min
4.8k uses
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Finance

ROI Calculator

Calculate return on investment (ROI) percentage and profit/loss for any investment.

1 min
6.3k uses
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Finance

Budget Calculator

Create a monthly budget plan and track income vs expenses to improve financial health.

5 min
5.4k uses
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Popular

Percentage Calculator

Work out percentages, percentage change, and find what percentage one number is of another.

30 sec
16.2k uses
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Math

Fraction Calculator

Add, subtract, multiply, divide, and simplify fractions with step-by-step solutions.

1 min
7.8k uses
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Math

Scientific Calculator

Advanced calculator with trigonometric, logarithmic, and exponential functions.

Variable
11.3k uses
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Math

Square Root Calculator

Calculate square roots and cube roots with detailed step-by-step explanations.

15 sec
4.6k uses
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Math

Average Calculator

Calculate mean, median, mode, and range for any set of numbers instantly.

1 min
6.1k uses
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Math

Ratio Calculator

Simplify ratios, solve proportions, and scale ratios up or down easily.

45 sec
3.9k uses
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Math

Exponent Calculator

Calculate powers and exponents with positive, negative, and fractional exponents.

30 sec
4.2k uses
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Math

GCD & LCM Calculator

Find Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of numbers.

30 sec
3.1k uses
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Math

Prime Number Checker

Check if a number is prime and find all prime numbers within a range.

15 sec
2.8k uses
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Math

Random Number Generator

Generate random numbers, dice rolls, lottery numbers, and custom ranges.

10 sec
8.7k uses
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Popular

Unit Converter

Convert between length, weight, temperature, volume, speed, area and more instantly.

1 min
15.3k uses
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Conversion

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin temperature scales.

15 sec
9.4k uses
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Conversion

Length Converter

Convert between meters, feet, inches, centimeters, miles, kilometers and more.

30 sec
7.2k uses
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Conversion

Weight Converter

Convert between kilograms, pounds, grams, ounces, tons and other weight units.

30 sec
6.8k uses
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Conversion

Time Converter

Convert between seconds, minutes, hours, days, weeks, months and years.

30 sec
5.1k uses
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Conversion

Speed Converter

Convert between mph, km/h, m/s, knots and other speed measurements.

30 sec
4.3k uses
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Conversion

Volume Converter

Convert between liters, gallons, cups, milliliters, fluid ounces and more.

30 sec
5.7k uses
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Conversion

Area Converter

Convert between square meters, feet, acres, hectares and other area units.

30 sec
3.9k uses
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Conversion

Pressure Converter

Convert between PSI, bar, pascal, atmosphere and other pressure units.

30 sec
2.8k uses
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Conversion

Energy Converter

Convert between joules, calories, kilowatt-hours and other energy units.

30 sec
3.2k uses
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Conversion

Data Storage Converter

Convert between bytes, KB, MB, GB, TB and other digital storage units.

15 sec
6.4k uses
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Conversion

Fuel Consumption Converter

Convert between MPG, L/100km and other fuel efficiency measurements.

30 sec
4.1k uses
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Popular

Age Calculator

Find your exact age in years, months, days, hours and minutes. See days until next birthday.

30 sec
9.1k uses
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Utility

Date Calculator

Calculate the difference between dates, add/subtract days, and find business days.

1 min
10.2k uses
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Utility

GPA Calculator

Compute your GPA (weighted or unweighted) and track term-by-term academic progress.

2 min
6.9k uses
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Utility

Grade Calculator

Calculate test scores, final grades, and what you need on finals to achieve target grades.

2 min
5.6k uses
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Utility

Time Zone Converter

Convert time between different time zones worldwide for meetings and travel planning.

1 min
8.3k uses
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New

Password Generator

Generate strong, secure random passwords with custom length and character options.

10 sec
12.7k uses
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Utility

QR Code Generator

Create custom QR codes for URLs, text, contact info, WiFi and more instantly.

30 sec
7.9k uses
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Utility

Color Picker & Converter

Pick colors and convert between HEX, RGB, HSL, and other color formats for design.

1 min
6.2k uses
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Utility

Text Case Converter

Convert text to uppercase, lowercase, title case, sentence case and more.

15 sec
4.8k uses
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Utility

Word Counter

Count words, characters, sentences, paragraphs and reading time for any text.

10 sec
9.4k uses
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Utility

Binary Converter

Convert between binary, decimal, hexadecimal, and octal number systems.

30 sec
5.3k uses
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Utility

Roman Numeral Converter

Convert between Roman numerals and standard numbers (Arabic numerals).

15 sec
3.7k uses
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Utility

IP Address Lookup

Find location, ISP, and other details about any IP address or your own IP.

30 sec
7.1k uses
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Utility

Concrete Calculator

Calculate concrete volume needed for slabs, footings, columns and other projects.

2 min
4.9k uses
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Utility

Paint Calculator

Calculate how much paint you need for walls, ceilings, and rooms with coverage estimates.

2 min
5.2k uses
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Utility

Tile Calculator

Calculate number of tiles needed for floors, walls, and backsplashes with waste factor.

2 min
4.6k uses
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Utility

Mulch Calculator

Calculate mulch, soil, or gravel needed for landscaping projects by area and depth.

1 min
3.8k uses
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Utility

Lumber Calculator

Calculate board feet, linear feet, and cost for lumber and wood projects.

2 min
3.4k uses
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Utility

Carpet Calculator

Calculate carpet needed for rooms in square feet or square yards with waste allowance.

1 min
4.1k uses
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Utility

Gravel Calculator

Calculate gravel or stone needed for driveways, paths, and landscaping in tons or cubic yards.

2 min
3.9k uses
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Utility

Brick Calculator

Calculate number of bricks needed for walls, patios, and construction projects.

2 min
3.2k uses
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Utility

Roof Calculator

Calculate roof area, pitch, and materials needed for roofing projects.

3 min
4.3k uses
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Utility

Gas Mileage Calculator

Calculate MPG, fuel cost, and trip expenses based on distance and gas prices.

1 min
6.7k uses
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Finance

Lease Calculator

Calculate monthly lease payments for cars and compare lease vs buy options.

2 min
5.8k uses
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Finance

Inflation Calculator

Calculate the effect of inflation on purchasing power over time using CPI data.

1 min
4.9k uses
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Finance

Paycheck Calculator

Calculate take-home pay after federal, state, and local tax withholdings.

3 min
8.4k uses
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Finance

Hourly to Salary Calculator

Convert hourly wage to annual salary and vice versa with customizable work hours.

1 min
7.3k uses
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Finance

Overtime Calculator

Calculate overtime pay with time-and-a-half and double-time rates.

2 min
4.6k uses
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Finance

Margin Calculator

Calculate profit margin, markup percentage, and pricing for business products.

1 min
5.1k uses
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Finance

Break Even Calculator

Calculate break-even point for business ventures with fixed and variable costs.

2 min
3.7k uses
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Finance

Depreciation Calculator

Calculate asset depreciation using straight-line, declining balance, and other methods.

2 min
3.4k uses
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Finance

Amortization Calculator

Generate detailed amortization schedules showing principal and interest breakdown.

2 min
6.2k uses
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Finance

APR Calculator

Calculate Annual Percentage Rate (APR) for loans and credit cards with fees.

2 min
4.8k uses
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Finance

College Savings Calculator

Plan and calculate savings needed for college education expenses and tuition.

3 min
4.1k uses
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Finance

Rent vs Buy Calculator

Compare the financial impact of renting versus buying a home over time.

4 min
5.9k uses
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Finance

Refinance Calculator

Calculate potential savings from refinancing your mortgage with lower interest rates.

3 min
5.3k uses
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Utility

Lottery Odds Calculator

Calculate odds of winning lottery games and compare different lottery formats.

1 min
4.2k uses
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Utility

Dice Roller

Roll virtual dice for games, D&D, and RPGs with multiple dice types and quantities.

10 sec
6.8k uses
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Utility

Coin Flip Simulator

Flip virtual coins for decisions, games, and probability experiments.

5 sec
5.4k uses
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Math

Probability Calculator

Calculate probability, odds, and statistical likelihood for various events.

2 min
4.7k uses
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Math

Standard Deviation Calculator

Calculate standard deviation, variance, and other statistical measures for data sets.

2 min
3.9k uses
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Math

Pythagorean Theorem Calculator

Calculate missing sides of right triangles using the Pythagorean theorem.

30 sec
5.2k uses
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Math

Circle Calculator

Calculate area, circumference, diameter, and radius of circles.

30 sec
4.3k uses
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Math

Triangle Calculator

Calculate area, perimeter, angles, and sides of triangles with various methods.

1 min
4.1k uses
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Math

Rectangle Calculator

Calculate area, perimeter, diagonal, and dimensions of rectangles and squares.

30 sec
3.6k uses
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Math

Cylinder Volume Calculator

Calculate volume and surface area of cylinders with radius and height.

45 sec
3.3k uses
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Math

Sphere Calculator

Calculate volume, surface area, and other properties of spheres.

30 sec
2.9k uses
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Math

Quadratic Equation Solver

Solve quadratic equations and find roots using the quadratic formula.

1 min
5.6k uses
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Math

Factorial Calculator

Calculate factorials, permutations, and combinations for any number.

15 sec
3.4k uses
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Math

Logarithm Calculator

Calculate logarithms with any base including natural log (ln) and common log.

30 sec
3.8k uses
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Math

Matrix Calculator

Perform matrix operations including addition, multiplication, determinant, and inverse.

2 min
4.2k uses
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New

Derivative Calculator

Calculate derivatives of functions with step-by-step solutions for calculus.

1 min
5.9k uses
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New

Integral Calculator

Calculate definite and indefinite integrals with detailed step-by-step solutions.

2 min
5.3k uses
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Math

Limit Calculator

Calculate limits of functions as x approaches any value including infinity.

1 min
4.1k uses
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Math

Sequence Calculator

Calculate arithmetic and geometric sequences, series, and find nth terms.

1 min
3.5k uses
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Math

Slope Calculator

Calculate slope, gradient, and equation of a line from two points.

45 sec
4.6k uses
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Math

Distance Calculator

Calculate distance between two points in 2D or 3D coordinate systems.

30 sec
3.7k uses
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Math

Midpoint Calculator

Find the midpoint between two points in 2D or 3D space.

30 sec
3.2k uses
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Conversion

Angle Converter

Convert between degrees, radians, gradians, and other angle measurements.

15 sec
3.9k uses
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Math

Trigonometry Calculator

Calculate sine, cosine, tangent, and solve trigonometric equations.

1 min
5.8k uses
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Popular

Pregnancy Calculator

Calculate due date, conception date, and track pregnancy week by week.

1 min
11.3k uses
Use Calculator
Health

Ovulation Calculator

Calculate ovulation dates and fertile window to help plan or prevent pregnancy.

1 min
8.9k uses
Use Calculator
Health

Period Calculator

Track menstrual cycle and predict next period dates based on cycle history.

1 min
7.6k uses
Use Calculator
Popular

Calorie Calculator

Calculate daily calorie needs based on age, weight, height, and activity level.

2 min
13.2k uses
Use Calculator
Health

Macro Calculator

Calculate optimal macronutrient ratios (protein, carbs, fat) for your fitness goals.

2 min
6.8k uses
Use Calculator
Health

Body Fat Calculator

Estimate body fat percentage using various measurement methods and formulas.

3 min
5.9k uses
Use Calculator
Health

Ideal Weight Calculator

Calculate your ideal body weight based on height, age, gender, and frame size.

1 min
6.4k uses
Use Calculator
Health

Pace Calculator

Calculate running pace, speed, time, and distance for training and races.

1 min
7.2k uses
Use Calculator
Health

Heart Rate Calculator

Calculate maximum heart rate and target heart rate zones for exercise.

1 min
5.1k uses
Use Calculator
Health

Water Intake Calculator

Calculate recommended daily water intake based on weight, activity, and climate.

1 min
4.7k uses
Use Calculator
Health

Sleep Calculator

Calculate optimal bedtime and wake time based on sleep cycles for better rest.

30 sec
8.3k uses
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Health

Blood Alcohol Calculator

Estimate blood alcohol content (BAC) based on drinks consumed, weight, and time.

2 min
5.6k uses
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Health

Caffeine Calculator

Track daily caffeine intake and calculate safe consumption limits.

1 min
4.2k uses
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Health

Smoking Cost Calculator

Calculate money spent on smoking and potential savings from quitting.

1 min
3.9k uses
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Health

Protein Calculator

Calculate daily protein requirements based on weight, activity, and fitness goals.

1 min
5.8k uses
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Health

One Rep Max Calculator

Calculate your one-rep max (1RM) for weightlifting and strength training.

30 sec
6.1k uses
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Health

Wilks Calculator

Calculate Wilks coefficient to compare powerlifting strength across body weights.

1 min
3.4k uses
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Health

VO2 Max Calculator

Estimate VO2 max to measure cardiovascular fitness and aerobic endurance.

2 min
4.3k uses
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Health

Army Body Fat Calculator

Calculate body fat percentage using U.S. Army and military standards.

2 min
4.7k uses
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Health

Lean Body Mass Calculator

Calculate lean body mass and fat-free mass for body composition analysis.

2 min
3.8k uses
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Finance

Mortgage Repayment Calculator

Calculate monthly mortgage repayments with detailed breakdown of principal and interest over loan term.

min
8.7k uses
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