Calculator Tools
Free online calculators for finance, health, math, construction, and everyday life.
52 tools available
Popular
Loan Calculator
Calculate monthly loan payments, total interest, and total cost. Works for any loan type.
Mortgage Calculator
Calculate mortgage payments including principal, interest, taxes, and insurance (PITI).
Compound Interest Calculator
Calculate compound interest with optional monthly contributions. See your money grow over time.
Simple Interest Calculator
Calculate simple interest with the formula I = P × R × T. Instant results for any period.
ROI Calculator
Calculate Return on Investment (ROI) and annualized return for any investment.
Savings Goal Calculator
Calculate how long it takes to reach a savings goal with monthly contributions and interest.
Salary Calculator
Convert salary between hourly, daily, weekly, monthly, and annual rates instantly.
Profit Calculator
Calculate gross profit, net profit, profit margins for any business or product.
Investment Return Calculator
Project future investment value with regular contributions and compound growth.
Break-Even Calculator
Find the exact units and revenue needed to cover all fixed and variable costs.
Markup Calculator
Calculate selling price from cost with markup, or find the markup on any selling price.
Profit Margin Calculator
Calculate gross profit margin and markup for any product or service.
Car Loan Calculator
Calculate monthly car payments, total interest, and total cost for any auto loan.
Currency Converter
Convert between 20+ currencies using reference exchange rates. Quick and easy.
Sales Tax Calculator
Add sales tax to a price or remove tax from a tax-inclusive amount. Works for all US states.
BMI Calculator
Calculate BMI in metric or imperial units. Instantly see your BMI category.
Calorie Calculator (TDEE)
Calculate daily calorie needs (TDEE) based on age, weight, height, and activity level.
BMR Calculator
Calculate Basal Metabolic Rate (BMR) using Harris-Benedict and Mifflin-St Jeor formulas.
Ideal Weight Calculator
Calculate ideal body weight using Devine, Hamwi, and BMI-based formulas.
Body Fat Calculator
Estimate body fat percentage using the US Navy method. Requires neck, waist, and hip measurements.
Water Intake Calculator
Calculate your daily water intake recommendation based on weight, activity, and climate.
Pregnancy Due Date Calculator
Calculate estimated due date from last period date or conception date.
Pace Calculator
Calculate running pace, speed (km/h and mph) from distance and time.
Calories Burned Calculator
Calculate calories burned during any exercise using MET values and body weight.
Macro Calculator
Calculate daily protein, carbs, and fat targets from calorie goals and diet type.
Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles.
Age Calculator
Calculate exact age in years, months, days, and total days from any birthdate.
Days Between Dates
Calculate the number of days, weeks, months, and years between any two dates.
Time Duration Calculator
Calculate hours worked between two times with optional break deduction.
Working Days Calculator
Count business days between two dates, excluding weekends and holidays.
Countdown Timer
Create a live countdown to any future date and event. Real-time days, hours, minutes, seconds.
Percentage Calculator
Calculate X% of Y, what percent X is of Y, and percentage change between two values.
Fraction Calculator
Add, subtract, multiply, and divide fractions. Shows simplified, decimal, and mixed number results.
Scientific Calculator
Full scientific calculator with trigonometry, logarithms, memory, and more.
Average Calculator
Calculate mean, median, mode, sum, and standard deviation from a list of numbers.
Standard Deviation Calculator
Calculate population or sample standard deviation and variance from any dataset.
Logarithm Calculator
Calculate log base 10, natural log (ln), log base 2, and any custom log base.
Fuel Cost Calculator
Calculate total fuel cost and cost per 100km for any journey. Supports L/100km and MPG.
Electricity Cost Calculator
Calculate electricity cost for any appliance. Daily, monthly, and yearly estimates.
GPA Calculator
Calculate your GPA from course grades and credit hours. Supports all standard letter grades.
Grade Calculator
Calculate weighted course grade from assignments, exams, and homework with custom weights.
Tip Calculator
Calculate tip amount and split the bill evenly between any number of people.
Concrete Calculator
Calculate concrete volume in m³ and ft³, plus number of 60lb and 80lb bags needed.
Paint Calculator
Calculate paint needed for any room, accounting for doors, windows, and number of coats.
Tile Calculator
Calculate number of tiles needed for any floor or wall, including waste factor.
Area Calculator
Calculate area of rectangle, circle, triangle, square, trapezoid, and ellipse.
Volume Calculator
Calculate volume of box, sphere, cylinder, cone, and pyramid with any dimensions.
Bandwidth Calculator
Calculate download time and bandwidth requirements for any file size and connection speed.
Download Time Calculator
Calculate how long it takes to download any file at a given internet speed.
Storage Converter
Convert between Bits, Bytes, KB, MB, GB, TB, and PB instantly.
Fuel Consumption Calculator
Calculate fuel efficiency in L/100km, MPG, and km/L from distance and fuel used.
Trip Cost Calculator
Estimate total road trip cost including fuel, tolls, and cost per person.