All Calculators & Tools
Browse our complete collection of free online calculators, generators, and converters.
Calculators
42Calculator
Free online calculator with basic and scientific modes.
BAC Calculator
Calculate your Blood Alcohol Content based on drinks, weight, and time.
Percentage Calculator
Calculate percentages, percentage change, and percentage difference.
Percentage Increase Calculator
Calculate percentage increase or decrease between two values with step-by-step formulas.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions.
Discount Calculator
Calculate sale prices and savings with any discount percentage.
Tip Calculator
Calculate tips and split bills between multiple people.
Margin Calculator
Calculate profit margin, markup, and revenue from cost and selling price.
Markup Calculator
Calculate markup percentage, selling price, and profit from cost.
Sales Tax Calculator
Calculate sales tax on any purchase with US state tax rates.
BMI Calculator
Calculate your Body Mass Index and see if your weight is healthy.
Calorie Calculator
Calculate daily calorie needs based on your age, gender, and activity level.
TDEE Calculator
Calculate your Total Daily Energy Expenditure with BMR breakdown and macro plans.
Calorie Deficit Calculator
Calculate your daily calorie target and timeline to reach your goal weight.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy Method with simple body measurements.
Loan Calculator
Calculate monthly payments, total interest, and amortization for any loan.
Mortgage Calculator
Calculate monthly mortgage payments, total interest, and amortization schedule.
Home Equity Calculator
Calculate your current home equity, LTV ratio, and borrowable amount. Project how equity grows over time.
Reverse Mortgage Calculator
Estimate HECM reverse mortgage proceeds, fees, and payment options based on age and home value.
HELOC Calculator
Calculate your home equity line of credit limit, draw period payments, and total interest cost.
CD Calculator
Calculate CD interest, total earnings, APY, and final value by term and compounding frequency.
Compound Interest Calculator
Calculate compound interest growth with monthly contributions over time.
Investment Calculator
Project investment growth over time with monthly contributions and scenario comparison.
Date Calculator
Calculate date differences or add and subtract days from any date.
Time Calculator
Add or subtract time values and convert between HH:MM:SS and decimal hours.
Hours Calculator
Calculate work hours from clock-in/out times with break deductions and weekly tracking.
Time Card Calculator
Track daily work hours, overtime, and estimated pay with a weekly timesheet.
Age Calculator
Calculate your exact age in years, months, days, and more.
GPA Calculator
Calculate your GPA from course grades and credit hours.
Grade Calculator
Calculate weighted class grades and find out what score you need on remaining work.
Concrete Calculator
Calculate concrete volume, bags needed, and cost for slabs, columns, walls, and stairs.
Real Hourly Rate Calculator
Calculate your true hourly rate by factoring in commute, overtime, and hidden work costs.
Math Solver
Solve equations step by step — linear, quadratic, and arithmetic expressions.
Salary Calculator
Calculate take-home pay after federal and state taxes for all 50 US states.
Overtime Calculator
Calculate overtime pay with time-and-a-half and double-time rates.
Timesheet Calculator
Track weekly work hours and calculate pay with FLSA overtime.
CPM Calculator
Calculate cost per thousand impressions, CPC, and CTR for ad campaigns.
Macro Calculator
Calculate daily protein, carbs, and fat needs based on your body and fitness goal.
Dividend Calculator
Calculate dividend income and DRIP portfolio growth over time.
Options Profit Calculator
Calculate potential profit or loss for call and put options.
Crypto Profit Calculator
Calculate crypto profit, ROI, total fees, and break-even sell price after exchange fees.
Futures Profit Calculator
Calculate futures P&L, tick and point value, fees, and margin for ES, NQ, CL, GC, and more.